Resideo/Honeywell AUBE RC840T-120 Electromechanical Relay W/ 24V - 120V Transformer

Compatible with 2-wire and 3-wire thermostats. This all-in-one relay includes a built-in 24V transformer. Features: Direct replacement for any brand name relay Built-in 24 V transformer for easy installation. Compatible with 24V thermostats with 2-wire connections (R,W) or 3-wire connections (R,W,C) Immediate relay activation provides improved temperature control and comfort Epoxy-soundproofed relay ensures quiet operation Terminal board connection enables easy installation Low current consumption means multiple relays can be controllers by a single thermostat