Hi-Rel Fuses

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.