Description
The Supco SHL180 is a precision-engineered snap disc temperature limit switch designed for reliable over-temperature protection in HVAC and appliance applications. With a fixed 140°F cut-in temperature and a fixed 180°F cut-out temperature, this switch automatically opens the circuit when temperatures rise beyond the set threshold and resets once temperatures return to a safe operating range — no manual intervention required.
Key Features
- 140°F fixed cut-in temperature for precise circuit re-engagement
- 180°F fixed cut-out temperature for reliable over-temperature protection
- Open on rise switch action — circuit opens as temperature increases
- Snap disc mechanism delivers fast, positive switching response
- Auto reset functionality — automatically restores circuit once temperature drops
- Includes adapter flange plate for simplified mounting and installation
How It Works
The SHL180 utilizes a snap disc bimetal element that reacts quickly to temperature changes. When the sensed temperature reaches the 180°F cut-out point, the disc snaps and opens the circuit, interrupting power to the controlled load. As temperatures cool back down to the 140°F cut-in threshold, the disc snaps back and automatically restores the circuit — providing continuous, hands-free protection.
Typical Applications
- Furnace and air handler limit control
- Appliance over-temperature protection
- HVAC equipment safety circuits
- Heat pump and electric heating element protection
- OEM equipment replacement and retrofit installations
Product Specifications
- SKU: SHL180
- Brand: Supco
- Fixed Cut-in Temperature: 140°F
- Fixed Cut-out Temperature: 180°F
- Switch Action: Open on Rise
- Reset Type: Auto Reset
- Switch Type: Snap Disc Limit Switch
- Includes: Adapter Flange Plate
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