Micropac Solid State Power Controllers | APC Technology Group

Solid State Power Controllers

Provides overload protection, telemetry, and remote reset

Solid State Power Controllers are the next generation in the evolution in “systemising” of Solid State/ Smart Solid State Relay technology. The SSPC typically is a smaller, lighter, and more reliable replacement for the combined functions of a circuit breaker, associated intelligent Solid State Relay combinations, and output power requirements. The Solid State Power Controller provides internal “self-protection”, in addition to protecting the ultimate load and associated interconnected systems.


Typically SSPCs utilise transformer isolation due to the higher power levels. Instant trip protection is provided to protect against shorts with an I2t trip, similar to a MIL-STD-704 trip profile, added to support higher in-rush current and system start-up current while providing protection for wiring, connectors, and other equipment

Space Flight projects benefit from high reliability SSPCs (up through MIL-PRF 38534 “K LEVEL”), payload monitoring and remote trip reset functions


  • Radiation Tolerant - radiation characterisation to 100KRads (Si) TIDS and LET up to 87 MeV/(mg/cm2)
  • 100 Volt
  • 1 to 30 Amps
  • TTL / CMOS compatible control
  • Instant Trip and I2T short circuit protection
  • Designed for 28VDC, 270VDC, and 115VAC applications
  • Custom designs are possible to satisfy requirements not addressed by the standard product offerings

Target Applications

  • Satellite/Space systems
  • Military/High Reliability Systems
  • DC Electromechanical and Solid State Relay Replacement
  • I/O Modules
  • Switching Heaters
  • 28V Bus applications

Typical Schematic & Trip Profile

Part No.
Programmable Instant Trip
Short Circuit Protection
TTL / CMOS compatible control
Status Interface
53282 100 1, 2 Yes No Yes Yes
53502 100 1, 2 Yes No Yes No
53506 100 5, 10, 15 Yes Yes Yes Yes
53507 100 2.5 to 25 Yes Yes Yes Yes
53508 270 10 Yes Yes Yes No
53509 100 10 Yes Yes Yes No
53513 100 5, 10, 15 Yes Yes Yes Yes
53514 100 20 Yes Yes Yes Yes

Ask our team

Our specialist High-Reliability components team have a long heritage supporting avionics projects. Our team of experts can offer technical advice and insight relating to Micropac's Solid State Power Controllers. Request a callback from a member of our team to get dedicated one-to-one support with your latest projetcs and applications.

0330 313 3220 | [email protected]