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The ECM INDUSTRIES LLC GSW-117 is a heavy-duty momentary toggle switch rated for 20 amps at 125 volts and 3/4 horsepower. It operates in a Single Pole Double Throw (SPDT) configuration with an On-Off-On switching sequence, returning to center when released. Connections are made via screw terminals, which allows for secure, tool-tightened wiring in demanding environments. The switch is designed for installation in a 0.5-inch diameter mounting hole. It is sold in packages of 5 and arrives carded for easy identification at the counter or on the truck. Electricians and HVAC technicians reach for this type of switch when a temporary contact closure is needed for motor control, test circuits, or manual override applications.
The GSW-117 suits residential and light commercial electrical and mechanical control panels where a momentary actuation is required. Common applications include manual motor start circuits, HVAC test and balance setups, pump control panels, and general-purpose electrical enclosures. The On-Off-On momentary action makes it appropriate for bidirectional motor jogging or any circuit that requires two separate momentary outputs from a single operator. The screw terminal design is compatible with standard branch-circuit wiring practices and does not require special tooling beyond a slotted or Phillips screwdriver.
Designed as an OEM-style replacement or new-installation toggle switch for residential and light commercial electrical control panels requiring a momentary SPDT switching function.
Installation should be performed by a qualified electrician in accordance with NEC guidelines. De-energize and lock out the panel or enclosure before wiring the switch. Secure conductors firmly under the screw terminals and verify the torque is sufficient to prevent loosening under vibration. Confirm the circuit load does not exceed the 20-amp and 3/4-horsepower ratings before energizing.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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