Solid State Power Controllers

Solid State Power Controllers (solid state circuit breakers) use electronic components (semiconductor devices) to monitor and control current levels rather than simple electrical devices. These elements are much more precise, and they shut down the circuit more quickly. The SSPC consists of the main JFET switch, current sensor, gate drive, bias power supply, control section, and the communications section. In the control section, there is a detection system designed to detect over-current, exceeded I2T conditions, and over-temperature of the SSPC switch. The over-current and exceeded I2 T detection protects the external circuit while the over-temperature detection protects the SSPCs power switching device.