Description
The Supco SHL519 is a board-mounted general purpose limit switch engineered for dependable temperature control and equipment protection in HVAC and related heating applications. With a fixed open temperature of 155°F and a fixed close temperature of 125°F, this switch automatically interrupts the circuit when an over-temperature condition is detected and resets itself once temperatures return to safe operating levels — eliminating the need for manual intervention.
Designed for direct board mounting, the SHL519 integrates cleanly into control assemblies and furnace boards, making it an ideal replacement or OEM-style component for a wide range of heating systems. Its 7.12″ insertion length provides reliable thermal sensing in duct or heat exchanger applications.
Key Features
- Fixed Open Temperature: 155°F — interrupts circuit on over-temperature
- Fixed Close Temperature: 125°F — restores circuit as temperature drops
- Switch Type: SPST (Single Pole, Single Throw), Normally Closed
- Auto Reset operation — no manual reset required after trip
- Insertion Length: 7.12″ for accurate thermal sensing
- Board Mounted design for easy integration into control boards and assemblies
- General purpose limit switch suitable for a wide range of HVAC heating equipment
Applications
- Furnace and air handler limit control
- Heat exchanger over-temperature protection
- Board-level replacement in residential and light commercial heating systems
- OEM and aftermarket service applications
Specifications
- Brand: Supco
- Model / SKU: SHL519
- Open Temperature: 155°F (Fixed)
- Close Temperature: 125°F (Fixed)
- Switch Configuration: SPST, Normally Closed
- Reset Type: Auto Reset
- Insertion Length: 7.12″
- Mounting Style: Board Mounted
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