0349309879 - ESAB Replacement Contactor CL07A300M2 with BCLF10 Aux

Technical Overview of the ESAB 0349309879 Contactor Assembly

The ESAB 0349309879 is a specialized electrical spare part designed for the maintenance and repair of ESAB welding power sources. This assembly is comprised of two primary components: the CL07A300M2 main contactor and the BCLF10 auxiliary contact block. The integration of these components provides the necessary electromechanical switching capabilities required to control the high-current circuits typical in industrial welding equipment. As an OEM (Original Equipment Manufacturer) part, it guarantees adherence to the precise electrical and mechanical specifications of the original machine design, ensuring seamless integration and optimal performance.

The core of this assembly, the CL07A300M2, is a 3-pole contactor belonging to the CL series, known for its compact footprint and reliability in motor starting and resistive load applications. The "M2" suffix typically denotes the coil voltage specification, which is critical for proper actuation within the welder's control circuit. The contactor is responsible for making and breaking the main power lines to the transformer or inverter block, handling the repetitive cycling inherent in welding operations. Its robust contact materials are engineered to withstand arcing and thermal stress, prolonging the service life of the power source.

Attached to the main unit is the BCLF10 auxiliary contact block. The "10" designation generally indicates a configuration of one Normally Open (NO) contact. This auxiliary component plays a vital role in the control logic of the welding machine, often providing feedback to the control board that the contactor has successfully closed, or interlocking with other safety circuits. By supplying the contactor and auxiliary block as a pre-assembled unit, ESAB simplifies the replacement process for technicians, reducing downtime and eliminating the need to source individual sub-components. This part is essential for restoring the functionality of ESAB equipment that has experienced contactor failure due to electrical wear or mechanical fatigue.