Campbell Hausfeld CW209000AJ Electrical Switch

Campbell Hausfeld CW209000AJ is a four-port pressure switch with a built‑in unloader that precisely controls the start/stop cycling of Campbell Hausfeld air compressors, delivering a 100/135 psi cut‑in/cut‑out range. This OEM replacement part is commonly listed as compatible with VT‑series units, with examples including VT631538, VT613106, EX800700AJ, and VT631900, making it a standard choice when servicing Campbell Hausfeld portable or tank‑mounted systems. In many installations it is paired with a CV220301AJ check valve (1/2" MPT x 1/2" tube inlet) to regulate airflow from the pump to the tank while preventing backflow and aiding recharge efficiency. Campbell Hausfeld manuals and replacement-part catalogs confirm CW209000AJ as the pressure‑switch component for these configurations, underscoring its role in 4‑port switch assemblies with unloader functionality.