13735102 - ESAB 3PDT Control Relay 42V Coil

Precision Control for Industrial Welding Systems

The ESAB 13735102 is a high-performance enclosed relay designed specifically for the demanding environments of industrial welding and fabrication. As a critical component in the control logic of ESAB welding power sources and wire feeders, this electromechanical device ensures the precise switching of auxiliary circuits. The relay features a Three Pole Double Throw (3PDT) configuration, which provides three separate sets of changeover contacts. This allows a single control signal to simultaneously manage multiple operations, such as activating a gas solenoid, engaging a contactor, and triggering a wire feed motor, thereby streamlining the internal logic of the machine.

Engineered with a 42VAC coil, this relay integrates seamlessly into standard low-voltage safety control circuits found in most modern heavy-duty welding equipment. The 42-volt standard is chosen for operator safety while maintaining sufficient potential to drive electromechanical components reliably over longer cable runs if necessary. The contacts are rated for 10 Amperes, providing ample capacity to handle resistive and slightly inductive loads common in welding machine internals. This rating ensures that the relay can endure the high-cycle nature of tack welding and trigger-operated processes without premature pitting or welding of the contact points.

The "Enclosed" designation refers to the protective housing surrounding the armature and contact assembly. In a welding shop environment, airborne contaminants such as conductive grinding dust, metal shavings, and oily fumes are omnipresent. The enclosed design of the ESAB 13735102 mitigates the risk of these contaminants fouling the contacts, which could otherwise lead to high resistance connections or open circuits. By using genuine OEM parts like this relay, maintenance personnel can guarantee that the replacement component matches the exact coil resistance and pull-in voltage specifications of the original design, preventing potential damage to the driving transistors on the main control board.

Reliability is paramount in MRO (Maintenance, Repair, and Operations). A failed relay can bring an entire production line to a halt. This ESAB spare part is manufactured to strict quality standards, ensuring consistent performance and longevity. Whether you are troubleshooting a legacy machine or performing preventative maintenance on a fleet of power sources, installing the correct specification relay is the first step in restoring full functionality.