36680 - ESAB TC-3A Fingertip Contactor Switch for HW-18/26

Technical Overview of the ESAB TC-3A Remote Switch

The ESAB TC-3A Remote Switch (SKU: 36680) is a specialized control accessory designed to interface directly with the Heliarc line of TIG torches, specifically the HW-18 and HW-26R models. This device functions as a remote contactor switch, allowing the operator to initiate and terminate the welding arc directly from the torch handle. This capability is essential for applications where standard foot controls are not feasible due to positional constraints or workspace geometry.

Technically, the TC-3A integrates a durable mechanical switch housed in a protective casing that straps securely to the torch body. The assembly includes a control cable that routes back to the power source's remote terminal. When the switch is depressed, it closes the contactor circuit, triggering the high-frequency start (if enabled) and main welding current. Upon release, the circuit opens, extinguishing the arc. This binary on/off functionality is distinct from variable amperage controls (potentiometers), making the TC-3A ideal for applications requiring constant current output with precise start/stop timing.

The unit is engineered to withstand the thermal and mechanical stresses typical of industrial welding environments. The cabling is insulated to resist heat and abrasion, ensuring signal integrity. Installation is straightforward, utilizing mounting hardware that accommodates the specific handle geometry of the HW-18 and HW-26R series, ensuring the switch remains fixed in an ergonomic position relative to the welder's thumb or finger.

Key Technical Specifications:

• Compatibility: Optimized for ESAB/L-Tec HW-18 and HW-26R TIG torches.


• Functionality: Remote contactor closure (Arc Start/Stop).


• Connection: Hardwired control cable compatible with standard ESAB remote receptacles (verify pin configuration).


• Construction: High-impact polymer housing with industrial-grade switch contacts.