The Siemens 3RV1928-1HA00-0FH0 is a terminal block accessory for the 3RV2 motor starter protector family. It provides the screw-cluster connection point for control wiring on the breaker base — what ships in the carton is the block itself, no extra hardware needed for a clean panel termination.
One terminal block, designed to snap onto the 3RV2 series circuit breaker. No separate mounting bracket or screw pack required — the kit is complete as delivered. The block accepts the standard control-circuit wiring for the motor starter protector auxiliary contacts and coil connections.