Description
The Supco SHL524 is a board mounted general purpose limit switch engineered to provide dependable high-temperature protection in HVAC heating systems. Designed for direct board mounting, this limit switch offers precise fixed temperature actuation and automatic reset functionality, making it an ideal choice for furnaces and other forced-air heating equipment.
Key Features
- Fixed open temperature: 170°F — trips the circuit to prevent overheating
- Fixed close temperature: 150°F — automatically resets once the system cools
- SPST (Single Pole, Single Throw) Normally Closed switch configuration
- Auto reset operation — no manual intervention required after cool-down
- 7″ insertion length for proper depth placement in the air stream
- Board mounted design for direct integration onto control boards
- General purpose construction suitable for a wide range of HVAC heating applications
Application
The SHL524 limit switch monitors supply air or heat exchanger temperatures and opens the circuit when temperatures reach 170°F, cutting power to the burner or heating element to prevent damage. Once temperatures drop to 150°F, the switch automatically resets and closes the circuit, restoring normal operation. This auto reset feature reduces service calls and keeps systems running efficiently.
Specifications
- Brand: Supco
- Part Number: SHL524
- Switch Type: SPST Normally Closed
- Open Temperature: 170°F (Fixed)
- Close Temperature: 150°F (Fixed)
- Reset Type: Auto Reset
- Insertion Length: 7″
- Mounting Style: Board Mounted
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