Schneider Electric (Barber Colman) 21-933-1 Cover Heavy-duty 220V AC rating designed

Heavy-duty 220V AC rating designed to meet precise 50/60 Hz technical specifications

this unit serves as the updated version for models 335-3/4-30 and M335-3/4-30

Double Pole Double Throw means this relay can switch two separate circuits at once

The shunt provides a continuous path on one pole which is often used for crankcase heaters or transformer power

Superior Conductivity: Welded terminal bolts eliminate the mechanical failure points common in crimped alternatives

Schneider Electric (Barber Colman) 21-933-1 Cover Heavy-duty 220V AC rating designedFor field technicians maintaining legacy pneumatic systems, the Schneider Electric (Barber Colman) 21 933 1 Cover provides a standardized replacement solution for aging or damaged thermostat faces. This gray plastic cover is engineered as the direct successor for a wide array of vintage components, including the 21 933, 21 934, 21 939, and high frequency units like the CT 12 and CT 921. Designed for 2x2 dial type pneumatic room thermostats, it