Supco SRL350 Manual Reset Limit Switch 350 Degrees F

Product Description

The SUPCO SRL350 is a manual reset bimetal limit switch designed for high-temperature cutout applications in heating and HVAC systems. Part of the SRL Series of 1/2 inch bimetal temperature controls, it opens the circuit when the sensed temperature reaches 350 degrees F and holds open until manually reset by a technician. The bimetal construction provides reliable thermal response in a compact, low-profile package. Vertical 1/4 inch terminals simplify wiring connections during installation. This switch is intended for licensed HVAC technicians servicing residential and light commercial heating equipment.

The SRL350 is suited for use as a high-limit safety control in gas furnaces, electric furnaces, and other heating appliances where an automatic reset would be unsafe or non-compliant. It is typically installed in the supply air plenum or heat exchanger vicinity to protect against overtemperature conditions. The compact bimetal design fits into tight equipment enclosures common in residential forced-air systems. Because the switch requires a manual reset, it ensures a technician inspects the root cause of the trip before the appliance is returned to service.

Key Features

• Manual reset operation requires technician intervention after a trip event
• 350 degrees F cutout temperature for high-limit safety protection
• 1/2 inch bimetal sensing element in a compact, versatile housing
• Vertical 1/4 inch quick-connect terminals for straightforward wiring
• UL recognized and CSA approved for use in listed appliances
• Uses 36T electrical ratings
• Made in the United States

Compatibility

Designed as an OEM-style replacement manual reset limit switch for residential and light commercial gas or electric heating appliances requiring a 350 degrees F cutout bimetal control.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect all power to the appliance and, for gas units, shut off the gas supply before servicing any limit switch. Ensure the replacement switch mounting orientation matches the original to maintain proper thermal contact. After installation, do not restore power without first diagnosing the condition that caused the original limit trip.