Schneider Electric KF300D1 Control Transformer

Schneider Electric’s Square D KF300D1 control transformer is a 1‑phase, 300 VA industrial power source in the Class 9070 family, designed to deliver a reliable, isolated secondary supply for control circuits in MCCs, starter panels, and OEM equipment. In common catalog configurations, it provides a 240/480 VAC primary input and a 120/240 VAC secondary output, enabling dual‑voltage sourcing from standard building supplies and machine controls. Rated for 50/60 Hz operation, this transformer suits both North American and international control systems that require a compact, robust low‑voltage feed for relays, timers, and logic circuits. The KF300D1/9070K300D1 family is widely cataloged alongside related 9070 models such as the TF300D1 variants, offering interchangeability within Square D’s 9070 platform for serviceability and replacement planning. Typical applications include control power for motor starters, relay panels, and automation logic in industrial equipment, where a dependable 300 VA supply helps maintain control circuits during startup transients.