Aube Tech Honeywell RC840T Relay With built-in 24V Transformer. Compatible with 2- and 3-wire thermostats - Relays and Transformers (Electromechanical and Solid state) - Line & Low Voltage Thermostats, Relays & Transformers,
RC840T-347 - Honeywell Home RC840T-347 Aube Electromechanical 347V Relay With Built in 24V Transformer | Plumbing Hub Canada – Plumbing Hub Canada Inc.