Description
The Mars 43306 is a Single Pole Single Throw (SPST) open-on-fall temperature switch engineered for dependable temperature sensing and equipment protection in HVAC and heating applications. Designed to open its contacts as temperature falls below the cut-out setpoint and close as temperature rises to the cut-in setpoint, this switch provides precise, automatic control to safeguard heating systems, boilers, and related equipment.
How It Works
This open-on-fall switch closes its contacts when the sensed temperature reaches the 275°F cut-in point, enabling equipment operation. When temperature drops to the 210°F cut-out point, the contacts open, interrupting the circuit. This action is ideal for high-limit protection, burner sequencing, and temperature-based interlock functions.
Key Specifications
- Switch Type: SPST (Single Pole Single Throw)
- Action: Open on Fall (contacts open as temperature decreases)
- Cut-In Temperature: 275°F
- Cut-Out Temperature: 210°F
- Differential: 65°F
- Brand: Mars
- SKU / Part Number: 43306
Features & Benefits
- Reliable SPST switching action for straightforward circuit control
- Open-on-fall design provides automatic high-temperature hold and low-temperature shutoff
- Wide differential range supports stable, chatter-free operation
- Suitable for use in heating systems, boilers, furnaces, and industrial temperature control circuits
- Compact design for easy integration into existing control panels and equipment
Typical Applications
- Boiler and furnace high-limit or operating control
- Burner sequencing and interlock circuits
- Heating element temperature monitoring
- Industrial and commercial HVAC temperature control
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