What is the difference between 392449-4 and 392449-4/U

having a genuine Honeywell key ensures that environmental controls remain protected and energy management protocols stay intact

allowing for faster wiring without the need for specialized tools

1/2" discharge) and comes pre-charged with 25 oz

Hermetic (H)

White-Rodgers 120-106131 Solenoid What is the difference betweenThe White Rodgers 120 106131 is a high performance 12VDC solenoid designed specifically for intermittent duty power switching in demanding electrical systems. This SPNO (Single Pole Normally Open) relay features a rugged construction with a continuous contact rating of 80 Amps and an impressive 400 Amp inrush capacity, making it a staple for high torque starter motors and hydraulic pump circuits. Engineered with an isolated coil configuration, it