What is the difference between the 392877 and the 392877/U

the limiter is designed to function regardless of the actuator's mounting orientation (CW or CCW)

This hub is specifically designed for Lau 3

14004447-001 is identical to 14004447-001/U

The IDEC SR3B-05 Relay Socket is a professional-grade 11-pin DIN rail mount socket engineered specifically for IDEC RR Series power relays

Nordyne 626375R Rollout Switch What is the difference betweenThe Nordyne 626375R is a critical manual reset rollout switch designed for Nortek, Intertherm, and Miller gas fired furnaces and packaged units. Engineered to trip at a 210F temperature limit (L210), this safety component monitors the burner vestibule for flame rollout conditions. When excessive heat is detected outside the combustion chamberoften caused by a cracked heat exchanger, clogged vent piping, or inducer motor failurethe switch opens the 24V