A solid state circuit breaker assembly includes a transistor, a transient voltage suppression device, and a circuit board. The transistor and/or the transient voltage suppression device may be electrically connected to the circuit board. The solid state circuit breaker module may be configured to be connected to one or more non-scalable modules to regulate current. The solid state circuit breaker module may be configured to receive one or more scalable modules. The transistor and/or the transient voltage suppression device may be disposed on the circuit board in a substantially symmetrical configuration.