Allen-Bradley X-343858 Control Circuit Module

The Allen-Bradley X-343858 Control Circuit Transformer delivers 75 VA of control power by stepping 240/480 VAC input down to 220/440 VAC output, making it a dedicated power source for industrial control circuits. The primary voltage range is 240 VAC or 480 VAC, with a secondary delivering 220 VAC or 440 VAC to feed relays, timers, and PLC peripherals in control panels that operate from higher-voltage mains. Rated for 50/60 Hz operation, this transformer is designed to be installed in Allen-Bradley automation cabinets and other compatible equipment to supply control power while the main power rail handles higher loads. The X-343858 designation identifies the control circuit transformer commonly encountered in both legacy and newer Allen-Bradley installations, providing compatible power for control devices without altering main drive or motor circuits. This transformer is intended for use where control circuits require a voltage near 220–440 V and where a step-down from 240/480 V is appropriate; it provides isolation between the control circuitry and the main power line, helping to minimize transients affecting relays and PLC peripherals.