The HP Agilent 34903A 20 Channel Actuator / General Purpose Switch Module has 20 independent single-pole, double-throw (SPDT) relays. Use the 34903A to cycle power to products under test, control indicator and status lights, and to actuate external power relays and solenoids. Combine it with matrix and multiplexer modules (not included) to build custom switch systems. Its 300V, 1A contacts can handle up to 50W, enough for many power line switching applications. The 34903A module is designed for use with the 34970A Data Acquisition/Switch Unit.