The SRH1 series single phase solid state relays feature integrated heatsinks for excellent heat dissipation efficiency, and the standard top/bottom terminal layout allows easy installation. The voltage input type models are available in zero cross turn-on and random turn-on models. The current input type models offer both phase control (equal power/equal phase) and cycle control (fixed/variable) options. The units support both DIN rail mount and panel mount methods for easy installation.