Service CTR02578 Definite Purpose Contactor

CTR02578 is a three-pole definite-purpose contactor engineered to switch 3-phase loads in equipment that uses a 110–120 V coil. Rated for 40 A, it provides a compact, reliable means to start and stop motors, compressors, fans, pumps, and other equipment in HVAC, refrigeration, and light industrial applications. The unit’s coil voltage—110 to 120 VAC—allows control from typical building automation and control circuits without requiring low-voltage transformers. As a definite-purpose design, it is intended as a replacement in OEM equipment or service scenarios where a standard DP contactor is specified, without additional overload protection. The three-load paths are controlled by the coil, enabling straightforward integration into existing control circuits, while the 40 A rating supports modest motor starting and running currents common in condenser fans, blowers, and water pumps. When energised, the coil pulls in the contacts to close the power circuits; when de-energised, the contacts open to interrupt current. This CTR02578 variant is configured in a three-pole arrangement, offering independent switching for each phase, and is suitable for use in systems that require a compact, maintenance-friendly DP contactor with a standard coil voltage.