this 20 Amp power relay is rated for 1 HP at 120VAC and 2 HP at 277VAC

Can this replace a shorter thermocouple

The "20CI" refers to a 20 PSI Cut-In (close)

and C-R427-G

This is an SPDT temp control

Aaon P51910 Relay Els PW 17895 this 20 Amp power relayThe Aaon P51910 Relay is a heavy duty 4PDT (4 Pole Double Throw) electromechanical component manufactured by IDEC, specifically engineered for high cycle reliability in commercial HVAC systems. This 24V AC coil relay serves as a critical interface for Aaon rooftop units (RTU) and air handling systems, allowing low voltage control circuits to manage multiple high load auxiliary functions simultaneously. With its 14 pin plug in design, the P51910