Cole Hersee Illuminated Toggle Switch SPST On-Off 4 Screw

The Cole Hersee Illuminated Toggle Switch SPST On-Off 4 Screw (part number 54109-BP) is a dual-function electrical control component designed for vehicle dash installations, marine electrical systems, and off-road equipment where operator feedback and low-light visibility are critical. This single-pole, single-throw (SPST) switch combines a tactile mechanical contact with integrated illumination, making it ideal for applications requiring positive engagement confirmation in low-visibility operational environments.

The illuminated toggle switch features a 15/32"-32 threaded mounting stem, 15/32" long, designed to secure into panels up to 1/8" thick with provided black metal facenut and nickel-plated hexnut hardware. Silver contacts rated at 25 amps at 12V DC deliver consistent electrical performance across repeated switching cycles. Terminals are available in both .250" blade and 6-32 screw configurations, accommodating different wiring harness standards. The handle is available in standard or lighted black nylon or clear plastic form, measuring 11/16" (17.5mm) in length, providing ergonomic tactile feedback during operation in dark or vibration-prone environments.

This switch is widely specified in 12V DC electrical systems found in patrol vehicles, off-road recovery rigs, marine vessels, and equipment installations where dashboard visibility and switch status confirmation are operational priorities. The illuminated handle serves as a status indicator without requiring separate indicator lights, reducing wiring complexity. Cole Hersee components are industry-standard in marine and automotive markets, known for consistent contact reliability and long operational life under harsh environmental conditions.

The SPST configuration provides simple on-off control without intermediate positions, making it suitable for systems requiring straightforward binary switching (lights, pumps, auxiliary equipment activation). The 25A capacity handles moderate-draw loads typical of auxiliary lighting, fuel pumps, and fan motors in 12V systems, while silver contact composition ensures minimal voltage drop and resistance to corrosion in salt-air or high-humidity operational environments.