Industrial BUC438UMM20 Definite Purpose Contactor

BUC438UMM20 Definite Purpose Magnetic Contactor is a three-pole, 40 A device from Breakers Unlimited designed for use where a definite purpose control is specified. It features a 120 VAC control coil and is marketed under both Breakers Unlimited and Arrow Hart brands; distributors such as Murray Lighting and Radwell list the model with the same coil voltage and current rating, confirming the 3-pole, 40 A, 120 V coil configuration. The model name BUC438UMM20 appears consistently in replacement-part catalogs and online listings, underscoring its role as a standard DP contactor within equipment that requires a dedicated control device. This part is typically used as a replacement in systems that originally used BU/Arrow Hart compatible DP contactors, providing a direct replacement option for maintenance and repair without changing the control circuit.