EPC Space – A Compact Power Switch for Extreme Conditions in Space (03/2025)

With the EPC7003ASH, EPC Space is introducing a cutting-edge power semiconductor component designed specifically for harsh space environments. Based on eGaN® (enhanced Gallium Nitride) technology, this transistor combines high switching speed, extreme radiation resistance, and compact design—making it ideal for use in satellites, avionics systems, and deep-space missions.

Technological Highlights

The EPC7003ASH is a surface-mountable (FSMD-A) transistor with a maximum drain-source voltage of 100 V and a continuous drain current of 10 A. Its particularly low on-resistance (typically 42 mΩ) combined with extremely low gate charge (only 2.2 nC) enables high-frequency switching with excellent efficiency—a crucial advantage in space systems where size and power consumption are critical.

Thanks to its lateral structure, the device features minimal parasitic effects and fast response times. Its small size (only 0.068 g) saves valuable space and weight—both essential in satellite design.

Radiation Hardening to Space Standards

Special emphasis is placed on radiation resistance: the EPC7003ASH is hardened against both Total Ionizing Dose (TID) at low and high dose rates, and Single Event Effects (SEE). It can withstand ion doses with a Linear Energy Transfer (LET) of up to 83.3 MeV/(mg/cm²)—even at 100% of the specified operating voltage. Furthermore, the component remains functional up to a neutron exposure of 4×10¹⁵ neutrons/cm².

Typical Applications

The EPC7003ASH is suitable for a wide range of high-reliability applications, including:

  • Rad-hard high-efficiency DC/DC converters
  • Electronic motor controllers in space systems
  • Power supplies in satellites
  • Components for deep-space probes where absolute reliability under extreme conditions is essential

Compact and Reliable

The hermetically sealed FSMD-A package not only protects against environmental influences but also facilitates integration into existing designs. Electrical connection is made via four pins (Gate, Drain, Source Sense, Source), with the “Source Sense” function enabling precise gate control.

The EPC7003ASH is a prime example of the synergy between modern semiconductor technology and robust space-readiness. With its excellent electrical performance, high radiation tolerance, and compact form factor, it provides system developers with a reliable solution for demanding applications—from geostationary satellites to interplanetary missions.