Description
The Supco SHL503 is a board-mounted, general-purpose temperature limit switch engineered for reliable overheat protection in a wide range of HVAC and heating applications. With a fixed open temperature of 190°F and a fixed close temperature of 150°F, this switch automatically interrupts the circuit when unsafe temperatures are detected and resets itself once conditions return to the safe operating range — eliminating the need for manual intervention.
Key Features
- Fixed open (trip) temperature: 190°F — breaks the circuit on overheat
- Fixed close (reset) temperature: 150°F — automatically restores circuit continuity
- Auto reset operation — no manual reset required after temperature normalizes
- SPST Normally Closed (NC) switch configuration for fail-safe circuit design
- 3.12″ insertion length for secure, accurate board-mounted installation
- Board-mounted design for direct integration into control assemblies and PCBs
Application
The SHL503 is ideal for use as a general-purpose limit switch in furnaces, air handlers, heat pumps, and other HVAC equipment where temperature monitoring and overheat protection are critical. Its normally closed SPST configuration ensures the controlled circuit remains active under normal operating conditions and opens only when the 190°F threshold is exceeded, providing dependable safety control.
Specifications
- Brand: Supco
- Part Number: SHL503
- Switch Type: SPST Normally Closed (NC)
- Fixed Open Temperature: 190°F
- Fixed Close Temperature: 150°F
- Reset Type: Auto Reset
- Insertion Length: 3.12″
- Mounting Style: Board Mounted
- Application: General Purpose Limit Switch
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