Solid state power controller（SSPC）Cards, distribution units, and modules provide the latest switches and circuit protection for secondary and primary distribution. Compared to it, SPC has functional and performance advantages over relays and circuit breakers, including higher reliability, precise measurement, extremely low power consumption, controlled rise to reduce EMI radiation drop time, "soft start" of loads, and controlled shutdown. The protection function includes quick short circuit

Protection, with a circuit shutdown time of approximately 1 ms and I2t overload protection. I2t protection can protect the wiring, load, and SSPC itself from overheating, while reliably switching to electric motors, capacitive or

Incandescent lamp load. SSPC boards and modules are processor based, providing advantages in flexibility, measurement and calculation accuracy, and connectivity with external power sources through data buses or network management computer interfaces such as CAN bus or RS-485.

SSPCChannels can be programmed for different rated currents to adapt to changing loads, and multiple SSPC channels can be connected in parallel to achieve higher current capacity. The power management computer can poll various SSPC values on the onboard bus or network interface parameters, including basic on/off and built-in test status; Input voltage, output voltage, and current board rail and/or load temperature. This data can be used to support system level diagnosis and prediction, enabling state based predictive maintenance to protect generators, batteries, wires, connectors, loads, and SSPC faults and potential damage.