RIB TR75VA003 AC Control Transformer

Functional Devices’ RIB TR75VA003 is a 75 VA transformer that steps 277 VAC down to 24 VAC to power low‑voltage control circuits, with a built‑in circuit breaker for convenient protection in panels or junction boxes. It supports flexible mounting with both a foot mount and a single threaded hub mount, making it easy to install in enclosures or on equipment rails. The 24 VAC secondary output is suitable for relays, contactors, PLC input modules, and other control devices commonly used in commercial and industrial environments where a 277 VAC supply is available. This UL‑listed transformer covers US and Canada and is designed as a Class 2 power source, helping meet common safety and wiring standards for control circuits. When selecting this unit, verify that your load does not exceed 75 VA at 24 VAC and that your primary is a 277 VAC source. The TR75VA003 part number identifies the 75 VA, 277→24 VAC transformer in the RIB family, a compact solution for reliable, code‑compliant control power in panel and cabinet installations.