AEM, Inc. thick film fuses are produced for the aerospace industry in AEM’s MIL-STD-790 / AS9100 facility in San Diego, CA. AEM’s fuses have been selected by most major space programs and have been in orbit for the past 35-plus years with zero reported failures. AEM, Inc. is the sole QPL listed manufacturer of FM12/P600L series solid body fuses.
AEM’s High Reliability Solid Body Fuses
Benefits
Thick film fusible element construction with glass arc suppressing system
Designed and screened specifically for high reliability applications where failure is not an option
QPL approved to MIL-PRF-23419/12
Manufactured and screened entirely in AEM’s San Diego Facility
Material and process traceability maintained for all fuse products (Group A and B screening and data standard)
Supplied with gold plated or Sn/Pb terminal finishes
Features
Operating temperature range of -55ºC to +125ºC
Consistent minimum and maximum clearing times at overload currents regardless of vacuum conditions
Solid body construction not subject to the de-rating factors of MIL-STD-975
Solid body construction able to withstand greater vibration and shock exposure without damage
Positive temperature coefficient of fusible element causing resistance to increase (prior to opening) preventing absolute short circuit to the power source
Internal construction ensuring that arc, plasma, and vapor contained within the fuse package during clearing process
Reliability plans for fuse products including ongoing 2000 hour life testing with over 10,000,000 life test hours completed with no failures reported
Applications
Military and commercial satellites and spacecraft
Protection of power supplies, batteries, and solar arrays
Isolation of redundant and branch circuits
Short circuit protection of squib and jettison circuitry
Available in matched set configurations for higher current applications
Fuse Selection Considerations
Applied DC voltage level
Steady-state operating current level
Ambient temperature/ PCB mount temperature
Potential overload current levels and length of time at which fuse must open
Surge in-rush and/or pulse currents
Lead configuration required: radial, formed, surface mount, and flexible or solid leads
Fuse Model Options
FM12
-
QPL listed to MIL-PRF-23419/12
DC voltage ratings of 50V, 72V, and 125V
Current ratings of 1/8A to 20A as single fuses
Matched sets available for higher current requirements
Formed, straight, and solder coated terminal options
Overload interrupt and clearing time
characteristics specified at 250%, 400%, and 600% levels
P600L 
Commercial version of the QPL FM12 series fuses
DC voltage ratings of 50V, 72V, 125V, 135V, and higher (consult factory)
Current ratings of 1/8A to 20A as single fuses
Matched sets available for higher current requirements
Straight, flexible, and solder coated terminal options
Overload interrupt and clearing time characteristics specified at 250%, 400%, and 600% levels
P700L 
Surface mountable version
Available on tape & reel for automated manufacturing processes
Internal solder either standard (Sn96/Ag4
(P700L) or high temp (Sn10/Pb88/Ag2
(P700LH)
DC voltage ratings of 50V, 72V, 125V, and higher (consult factory)
Current ratings of 1/8A to 20A as single fuses
Matched sets available for higher current requirements
Wraparound reverse “J” tab terminal for surface mounting
Overload interrupt and clearing time characteristics specified at 250%, 400%, and 600% levels
P800L 
Slow blow version
Designed to operate with slower clearing times
DC voltages 72V and higher (consult factory)
Current ratings of 2A to 15A as single fuses
Matched sets available for higher current requirements
Straight and solder coated terminal options
Overload interrupt and clearing time characteristics specified at 250%, 400%, and 600% levels
SK406
Formed terminal version of the P600L fuse models
DC voltage ratings of 50V, 72V, 125V, 135V, and higher (consult factory)
Current ratings of 1/8A to 20A as single fuses
Matched sets available for higher current requirements
Modified radial lead configuration allows for alternate surface mount flexibility
Overload interrupt and clearing time characteristics specified at 250%, 400%, and 600% levels
SM1206
Surface mount chip version (solid body construction)
EIA 1206 case size
DC voltages of 24V and 32V
Current ratings 1/4A to 7A as single fuses
Overload interrupt and clearing time characteristics specified at 250%, 400%, and 600% levels
Sn/Pb plated end terminations
Non-Standard
For custom fuse model current ratings, voltage ratings, terminal finish, modules, and other alternate configurations, please contact the factory.