New Franchise – Karl Kruse Adds Golledge to Authorized Portfolio with New Strategic Distribution Agreement

Karl Kruse is now an authorized distributor and design-in partner for Golledge throughout Germany and Europe.

As a global supplier of frequency control products, Golledge Electronics has been an industry leader for over 25 years. Every day, Golledge Electronics works with the world’s leading designers and manufacturers to create competitive RF products that are an integral part of their designs. Golledge Electronics’ broad product range includes all types of timing components including: Crystals, Oscillators, TCXOs, VCXOs, OCXOs, SAW and Crystal Filters, Duplexers and RTC Modules.

The products are used in a wide variety of areas in the electronics industry, such as telecommunications, satellites, microprocessors, aerospace, the automotive industry, instrumentation and medical applications.

Hi-Rel Fuses P600L

AEM, Inc. HRB Series Ferrite Chip Beads are manufactured in an AS9100 facility in the USA (San Diego, CA) and offer full material and process traceability. All components are manufactured with qualified materials and process systems and tested according to DSCC drawing 03024.


HRB Series beads are designed for mission critical applications. Capable of operating in harsh environments and extreme temperatures, these Hi-Rel chips are tin whisker free with Sn/Pb or Au terminations. A variety of EIA/EIAJ chip sizes from 0603 to 1206 are offered and feature nickel barrier terminations with a solder pad finish to ensure a reliable solder connection.



AEM, Inc. is the only US manufacturer of solid state current limiting fuses manufactured using thick film technology followed by testing and qualification for spacecraft/satellite applications. AEM, Inc.’s P600L series fuses have been selected by most major space programs and have been in orbit without failure for the past 35 years.


• Used in military and commercial satellites and spacecraft,including manned spacecraft

• Protection of power supplies, batteries and solar systems

• Isolation of redundant and branch circuits

• Short-circuit protection by fired squib and ejector circuit



  • Consistent clearing times achieved at overload currents regardless of vacuum conditions
  • Solid body construction without outgassing and not subjected to the de-rating factors of MIL-STD-975
  • Solid body construction capable of withstanding greater vibration and shock exposure without damage
  • Positive temperature coefficient of fuse element causing resistance to increase (prior to opening) thereby preventing absolute short to the power source
  • Internal construction ensuring that arc, plasma, and vapor are contained within the fuse package during overload current conditions
  • Groups A/B data supplied with each shipment and Group C inspection optional
  • High-reliability fuse series with over 29 million hours of life testing without a failure
  • Available as QPL Certified per MIL-PRF-23419/12

Introducing Geehy Semiconductor, an ST Micro Alternative with Shorter Lead Times

As an authorized distributor, Karl Kruse  has partnered with Geehy, in effort to provide seamless access to Geehy solutions worldwide including ST Micro Alternatives.

Geehy now brings over 20 years of experience in the development of application-specific semiconductor Geehy is a professional supplier of products and solutions for the industrial-grade general MCU, BLE SoC, and domestic leading IIoT SoC-eSE security SoC.

Geehy is committed to providing higher quality products and services in industrial control, consumer electronics, medical equipment, smart home, and automobile application.

Products & Solutions: 


✓ APM32 Microcontrollers – Achieve competitive advantage

  • ARM® Cortex®-M7
  • ARM® Cortex®-M3
  • ARM® Cortex®-M0+ 

✓ BLE SoC – Fully upgraded transmission performance

  • BLE 5.1
  • BLE 4.2

✓ Dachuan Series SoC – Based on the T-head CPU cores

  • GS300
  • GS400
  • GS500

✓ Security SoC Platform – Ensure the security of internet information

As a licensee of ARM, the microcontrollers of the APM32 series are based on Cortex-M0+, Cortex-M3 and Cortex-M4 (with FPU) cores. For applications requiring high performance, Cortex-M7 based controllers are under development. In addition to this architecture, RISC-V and T-head cores are also in the focus of development.

The overview on the left shows Geehy’s current product portfolio.



In addition to the standard microcontrollers already mentioned, which were introduced to the market in the period 2019 to 2021, 2022 shows that Geehy is now concentrating in the low-power, automotive as well as motor control areas.

Introducing Geehy Semiconductor, an ST Micro Alternative with Shorter Lead Times | Request Cross Reference &  Samples.

Have you become interested? Our team will be happy to advise you in detail about currently available derivatives and packages.

Call +49 211 27403530

us or send us an enquiry  to

Sourcing The Correct Display

Displays play an active role in all environments of our lives – at home, in the workplace, when travelling, and in leisure venues.

Electronic displays provide visual information and data, to be easily consumed by the target audience. There are many different types of displays technology available, but what do you need to consider when selecting the correct display for a specific application?

Application value – if your application is being designed with a high-end price point, you may need to consider a high-quality display to match the application design. For example, a TFT display with IPS technology (for high quality all-round viewing angles), and high brightness, will ensure that the product looks impressive visually.

Type of information – a simple character LCD or OLED may be appropriate for displaying a basic level of information, such as a security panel simply stating ‘armed’. However, if you want to promote something you are going to want an eye-catching display, such as a TFT which provide a full colour, graphic, image or video.

Environment – If the application is going to be outdoors, you will need to consider how the display will perform in direct sunlight. There are reflective displays that work well in this situation and modules that can be enhanced to cope with such environments. Also, extreme temperatures can cause displays to experience failure or issues, and some technologies can cope better in harsh, cold, or hot, temperatures.

Enhancement – if the product requires some form of user interaction, you may consider touch screen technology. TFT technology is most suited for touch screen applications, with some OLEDs also capable. Displays can also be enhanced in many ways, such as adding cover glass which can improve a displays durability, and sunlight readability.

Budget – display technologies vary in cost. Monochrome LCDs tend to be the best option for a low-cost application that needs to display basic character or graphic information. TFTs would be the most expensive option, however, this comes down to the specification required. Smaller, less technical TFTs have become more economical as the technology has developed over time.

When all the above has been considered, you will be in a good position to select the appropriate technology. Below is a brief breakdown of the four main display technologies.

Monochrome LCD

This technology is the oldest technology, but it certainly still has a valuable role to play in the market. These displays are easy to interface, with simple character and graphic options available. They are most used in low-cost applications, such as fire and security panels.


TFT display technology is improving all the time. These displays cover a huge range of the market and are generally considered the most ‘premium product’. High bright displays, IPS all-round viewing angles, touch screen technology, and high-definition resolutions are just a few of the key features.


A simple way to describe this technology would be a much-improved LCD, although the display is a completely different technology. They have brighter text/graphics on a true black background and are viewable from all angles.


This is a relatively new technology which is ideal for ultra-low power applications. The bi-stable technology enables the display to retain the image, even when the power is disconnected. The most recognisable application for this technology now is shelf-edge labelling.

Contact Karl Kruse at Schirmer Strasse 59, 40211 Düsseldorf
by phone at + 49-211 27403530, e-mail to or in the shop at

Megawin MCU provide Flash memory from 4KB to 132KB with competitive price and good quality

Megawin Technology was formed by a group of IC design and sale specialists in 1999. The company’s mission is to become the worldwide MCU supplier through nonstop research & development and patent portfolio plan.

Megawin 8bit 8051 MCU and 32bit Cortex M0 MCU , which are widely used  for the application such as Telecom, Instrument equipment and lots of controller requirement.

Item                 Flash memory size

—————–     ————————————–

MG82F6D17     16KB ,      8bit 8051 MCU

MG82F6D32     32KB ,      8bit 8051 MCU

MG82F6D64     64KB ,      8bit 8051 MCU

MG32F02A032    32KB  , 32bit M0 MCU

MG32F02A064   64KB ,   32bit M0 MCU

MG32F02A128  128KB ,  32bit M0 MCU

MG32F02U128   128KB , 32bit M0 USB MCU

MG32F02U064     64KB , 32bit M0 USB MCU

Reverse Logistics

The reverse logistics applies to all operations related to the reuse of products and materials. It is “the process of moving goods from their typical final destination for purposes of valuation or proper disposal”.

Reverse logistics is a long-overlooked element in the consumer electronics fulfillment cycle. While the forward logistics commands are focused (the flow of product from the factory to the end user), the reverse logistics takes place after a product has reached the customer

Karl Kruse reverse supply chain logistics include:

  • Disposal of IT assets: Global, secure and compliant disposition services for IT assets at the end of their life, including deletion and disposal of data, recycling and re-marketing of systems and components.
  • Electronic Components Distribution: Electronic components distribution, Electronic components sourcing service and quality control programs based on extensive testing capabilities, integrated systems, industry information, and a global market presence.
  • Product returns management: Value recovery through our asset distribution and the re-marketing of materials back into the global supply chain.
  • Service Spare Parts Management: Optimizing inventory and reducing the risk of excess spare parts using our planning processes to improve serviceability and overall sales.

New Series Of Enclosed AC-DC Switching Power Supplies

Power supplies for 15-150W in particularly flat housings

The power supplies of the new LMxx-23Bxx series with their first-class electrical, climatic and mechanical parameters are an ideal choice for demanding applications in many areas of application.

The new AC / DC power supplies of the LMxx-23Bxx series can be used very universally in the industrial, laboratory and consumer sectors. Typical applications are e.g. Measuring and control devices, automation equipment, distributed networks, security technology, smart home, IoT and household appliances.

The power supplies of the LM series have a highly compact metal housing and can be operated with either AC or DC voltage. New devices with particularly wide input voltage ranges of 85-305 VAC or 100 / 120-430 VDC were recently introduced under the name LMxx-23Bxx. The addition to the program includes a total of seven series with output powers of 15W, 25W, 35W, 50W, 75W, 100W and 150W, each of which has up to seven product versions with an output voltage of 3.3V, 5V, 12V, 15V, 25V, 36V or 48V.

The isolation between input and output is designed for voltages up to 4 kVAC and the EM interference emission fulfills the requirements of class B of EN 55032 even without additional external components high efficiency of the new power supplies. The output is protected against short circuit, overcurrent and overvoltage; a range of -30 ° C to + 70 ° C is permitted for the temperature at the place of use. A protective coating of the housing (article number with suffix “Q”) and a protective cover for the connections (article number with suffix “C”) are available as optional equipment.

Power supplies for 100-320W with active PFC and wide range input

The power supplies of the new LMFxx-23Bxx series are ideal solutions for demanding applications.

As they are equipped with high peak input voltages, the LMFxx-23Bxx power supplies have wide input voltage ranges of 85-305 VAC or 120-430 VDC. This makes them suitable for connection to networks with nominal voltages of 115V, 230V and 277V and remain operationally reliable even in the event of significant transient or long-term overvoltages. The new series deliver output powers of up to 100W, 150W, 200W and 320W and nominal output voltages of 5V, 12V, 15V, 24V or 48V, which can be trimmed with a potentiometer. An active power factor correction (PFC) ensures, among other things, ensure that the harmonic currents always remain well below the relevant limit values ​​for electromagnetic interference emissions according to EN 61000-3-2.

The isolation between input and output is designed for voltages up to 4.0 kVAC. Functions for protection against short circuit, overcurrent, overvoltage and overtemperature and an MTBF over 250,000 h ensure safe and reliable operation. A protective coating of the housing (article number with suffix “Q”) or a protective cover for the connections (article number with suffix “C”) are available as optional equipment.

Application Areas

The new AC / DC power supplies of the LMxx-23Bxx + LMF100 / 150/200 / 320-23Bxx series can be used very universally in the industrial, laboratory and consumer sectors. Typical applications are e.g. Measuring and control devices, automation equipment, distributed networks, security technology, smart home, IoT and household appliances.

Contact Karl Kruse at Schirmer Strasse 59, 40211 Düsseldorf by phone at + 49-211 27403530, e-mail to .

You will find the perfect switching power supplies for your application here.

EC Fans – Growing In Popularity

Energy conservation is of ever increasing importance in today’s world. About 25% of the primary energy consumption in the residential and commercial sectors is used by electric motor-driven systems and components in appliances and equipment. Replacing existing equipment with advanced energy-efficient motors results in a substantial reduction in energy usage and cost.For today’s demanding applications that require increased electrical efficiency,EC (electronically commutated) fans represent a significant advancement in power savings technology, providing cooling and air flow solutions.

What Are EC Fans

EC fans are powered by brushless DC motors, which are also known as EC motors. Due to its inherent design that uses permanent magnets to generate a secondary magnetic field rather than copper windings, DC motors can be up to 30% more efficient than AC motors . Brushless DC motors are typically 85-90% efficient while brushed DC motors are generally in the range of 75- 80% efficient; the brushed motors lose efficiency from brush friction. The increased efficiency of the brushless motor means that less energy is lost as heat, while more energy is turned into rotational force and therefore power.

EC motors are controlled by external or onboard electronics that convert the incoming AC power signal to the DC voltage needed by the motor. The electronic circuitry performs the function of the mechanical commutation that switches the direction of the current and the magnetic field polarity to induce the motor’s rotation. As adjusting the power to the EC motor controls the EC fan speed, thereby improving performance, the design allows for more accurate and efficient motor control.

Why Use EC Fans

As long as the interface between the fan and the device is left unchanged, EC fans can be used in most applications where AC fans are used.When this interface is properly designed, EC fans can be used as “drop-in” replacements for AC fans. Compared to AC fans, EC fans are the same size while offering the same or higher airflow capacity — all with significantly less power.

Because they have built-in variable speed control a A large portion of the energy efficiency of EC fans occurs . Small reductions in the fan speed lead to large reductions in the power requirement, since the relationship between the fan speed and the power required by the fan is a cube function. Precisely controlling the fan speed to match the airflow demand of the application can result in substantial energy savings.

High efficiency EC fans have gained popularity and are being used in applications where there is a need to meet energy efficiency regulations, yet they offer other advantages as well. EC motors avoid the sparking and potential electromagnetic interference of brushed motors. They have longer service life due to the smaller heat losses and lower operating temperatures. The lower operating temperature means that the fan does not have to do extra work to remove wasted heat that is generated by the motor itself. EC motors offer a wide operating window of fairly constant efficiency over a range of speeds due to their variable fan speed control, when compared to AC motors, which tend to have peak efficiency at a single speed. In addition, EC motors require little to no maintenance and provide increased reliability. Since EC fans have lower operating costs, this leads to shorter payback periods for new equipment.

EC fans are ideal for use in major home appliances such as refrigerators, freezers, ovens, range hoods, microwaves, dishwashers and clothes washer-dryers.

Originally used only in high-end appliances, they are now used in high volume/mass market appliances due to their energy savings advantages (i.e., their higher efficiencies). Additional applications may include air conditioning units, heat pumps, furnace fans, dehumidifiers, beverage vending machines, automatic icemakers, commercial appliances, commercial chillers, duct fans for ventilation, condenser units and extraction fans for removing smoke and exhaust. However, the biggest uses for motor-driven elements in both the residential and commercial sectors are refrigeration and HVAC (heating, ventilation and air conditioning).

Market Requirements for Energy Usage

Government eco-design regulations and marketplace requirements for energy efficiency standards are driving design considerations, in the consumer appliance market.Energy efficiency has become one of the performance specifications for new appliances. The high electrical efficiency of EC fans aids in meeting these requirements.

In the U.S. market, the Department of Energy (DOE) is responsible for upholding the minimum energy efficiency standards for household appliances that were established in 1987 as the National Appliance Conservation Act. Under the Federal Trade Commission falls, labeling appliances with the ENERGY GUIDE, which lists energy consumption, efficiency and operating cost information. The ENERGY STAR label, a voluntary program under the Environmental Protection Agency, has even more strict requirements on energy savings. The Building Technologies Office of the DOE has outlined potential energy savings using EC motors in commercial and residential equipment.

While others are in process, some energy conservation standards have been established so far.

Examples of some of these standards are as follows:

Residential refrigerators and freezers – 76 FR 57516 (September 15, 2011)
Residential clothes dryers – 80 FR 16309 (March 27, 2015 – proposed rule)
Commercial and industrial fans and blowers – 81 FR 75742 (November 1, 2016 – proposed rule)
Residential mechanical ventilation system fans – 82 FR 2857 (January 10, 2017)
The European Union established two eco-design directives on minimum energy efficiency requirements. Directive 2009/125/EC extends the requirements for energy-related products (ErP) which help to reduce electrical usage, such as insulation materials, while Directive 2005/32/EC sets the requirements for energy-using products (EuP) such as household appliances.

Several energy conservation standards have been established, and others are under consideration:

Household refrigerators – Commission Regulation (EC) No 643/2009
Household dryers – Commission Regulation (EU) No 932/2012
Domestic ovens, cook tops, and range hoods – Commission Regulation (EU) No 66/2014
Professional refrigeration units (storage cabinets, blast cabinets, condensing units and process chillers) – Commission Regulation (EU) 1095/2015.


Home appliances, those that operate continuously, such as refrigerators and freezers, provide the best opportunity for energy savings. Improvements on features such as seals and compressors, the usage of vacuum panels for added insulation, and the switch to LED lighting made some reduction in energy consumption for these appliances. The best opportunity for energy savings offers the use of EC motors and fans. Fans and motors are used both inside the refrigerator, to circulate air around the coils and maintain specified temperatures, and outside, to cool air around the condenser.

Range hoods provide another opportunity for using EC fans. While not in continuous operation, the function of a range hood, or exhaust hood, is to remove heat, steam, fumes, smoke, odors, grease and airborne particles in the area above a cooktop by means of an electric fan. To remove all these potential contaminants while not being so noisy that it is never used, the fan needs to be sufficiently powerful . In a more energy-efficient way EC fans provide both of these functions. As the appropriate fan speed can be selected as needed, Dual-speed range hoods provide even greater energy savings.

Washer-dryer combos and Clothes dryers (which, while more common in the European market, are growing in popularity in the U.S. market) are a third example of home appliances where EC fans provide a great benefit. To remove moisture from the clothing EC fans are used to bring hot air into the dryer . The humid air is either sent out through an exhaust vent or passed by a heat exchanger to remove moisture through condensation before more hot air enters the dryer. Increases in air flow performance are provided by EC fans, and this improves the energy efficiency of these appliances, while their lower noise level improves customer satisfaction.

Central air conditioning systems use several motors, one each for the compressor, the outdoor fan and the indoor blower. To circulate air throughout the ductwork a similar indoor blower is used in furnace systems. Replacing existing AC fans with more energy- efficient EC fans offers the highest potential savings due to the variable fan speed motor, although maximum energy savings can only be achieved if the entire system, including the compressor, is designed for variable speed. Also, running a furnace fan at a reduced speed may require it to operate for a longer time period, reducing some of the savings.


To meet the more stringent energy efficiency standards in place EC fans are being used in both the U.S. and European markets. EC fans can be used as drop-in replacements for less efficient AC fans, by maintaining the same interface between the fan and the appliance. EC motors can drive both axial and radial fans, as needed by the specific application. Orion Fans will be introducing a family of EC fans and blowers offering low power, dual speed, energy-efficient cooling solutions. Ranging in sizes from 60mm to 280mm, some of these EC series fans feature universal voltage input making them easy to design in for a wide variety of applications. Enabling customers to meet energy-consumption requirements from agencies like ENERGY STAR, they offer energy savings of up to 50%. Additional models and sizes of EC fans will be available from Orion Fans.

OLED, LCD, TFT And Customized Display Solutions For Industry

Karl Kruse GmbH & Co KG, based in Kaarst is now the authorized distributor for OLED, LCD, TFT and custom displays for the Chinese manufacturer Tsingtek displays Company Ltd for Germany, Austria and Switzerland. As a specialized partner to display the processing industry, it is our strength in customer-specific solutions.

The focus of the products are the application areas and target groups of customers with applications in automotive, measurement, analysis, medical, audio and video, energy, security, household and water treatment technology, telecommunications and household goods and many more.

Tsingtek Displays Company Ltd of China, one of the leading suppliers of display products in China. Established since 2002, Tsingtek uses the latest high-tech techniques and processes to design and produce displays that range from a simple LCD alphanumeric component to the more complex LCD and OLED Graphic Modules. Their advanced production facilities utilize COB, SMT, COG, and TAB processes to support the production of standard and customized display modules with many font, voltage, power and temperature options.

Highlights at the Embedded at booth 268, Hall 1

At Embedded in Nuremberg from 24 to 02/26/15 the Kaarster Karl Kruse shows GmbH in cooperation with the company Open China Gateway in Hall 1, Stand 268 amd the wide range of display products, including LCD, OLED, TFT and custom modules.
For signed visitors, we keep free admission tickets. Please contact to arrange an appointment and tickets please email and

Overcurrent Power Protection For Industrial Applications

The AirMatrix® Family (mains voltage fuses) has been developed especially for the over-current protection of AC voltage circuits and is widely used in power applications. Based on an innovative technological platform, AEM (Sales Karl Kruse) has successfully developed the family with unique polymer materials, product design and manufacturing process. AirMatrix® fuses have a higher reliability, stability and PPR.
AEM’S AIRMATRIX 2410 is the industry’s smallest fuse with 250VAC. The operating temperature of -55 ° AIRMATRIX operates at up to + 125 ° C. The series met with several safety standards such as UL, PSE, TUV and CQC.
The AIRMATRIX surface mount devices (SMD) are lead-free, halogen-free and RoHS 2A (250VAC / 125VDC), 2.5A – 10A (125VAC / 125VDC) and 12A – 20A (65VAC / 65VDC) 0.5A.
As a distributor of AEM we are specialist for fuses, those will fulfill important functions in LCD TV, LED Lighting, Battery Pack protection, telecom / datacom, computer server / storage system, power adapters, backlight drivers and in industrial applications and medical technology.