MARS 43327 Pressure Switch
For service calls involving high-side protection, the MARS 43327 Pressure Switch is a reliable HVAC high pressure cut-out designed to prevent compressor damage during critical over-pressure events. This SPST normally closed switch features a factory-set 350 PSI cut-out and an automatic 250 PSI cut-in, making it an essential component for maintaining system safety in R410A refrigeration and heavy-duty air conditioning applications. Built with tamper-proof construction, this Klixon 4-series equivalent ensures long-term stability by eliminating field-adjustment errors. The compact, lightweight design allows for direct mounting on tubing via a 1/4 inch female flare S.A.E. connection with a built-in deflator. Whether you are troubleshooting a fixed high pressure switch failure or performing a standard retrofit, this hermetically sealed sensor handles up to 6 amps at 240V and includes 18-inch leads for straightforward wiring into the control circuit.
Key Benefits for Contractors:- Automatic Reset Logic: Restores circuit continuity once pressure drops to 250 PSI, reducing unnecessary manual service resets.
- Direct Tubing Mount: Features a 1/4" female flare fitting that threads directly onto the service port for a fast, leak-resistant installation.
- Severe Duty Rating: Rated for up to 100,000 cycles, providing consistent performance in demanding commercial HVACR cycles.
- R-410A Compatibility: Specifically engineered to handle the higher operating pressures associated with modern refrigerants.
What is the reset behavior of the MARS 43327?
This is an automatic reset pressure switch. It will open the circuit (Cut-Out) when system pressure reaches 350 PSI and will automatically close the circuit (Cut-In) once the pressure falls back to 250 PSI.
Can this switch be used on the suction side?
No, with a 350 PSI opening point, this is strictly a high pressure cut-out switch. Using it on the low-pressure side would result in the system never cycling properly under standard cooling parameters.
Does it require a mounting bracket?
No, the compact peanut switch design is intended for direct mounting to the refrigerant line, minimizing vibration fatigue on the 18-inch wire leads.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
MARS 43327 Pressure Switch
For service calls involving high-side protection, the MARS 43327 Pressure Switch is a reliable HVAC high pressure cut-out designed to prevent compressor damage during critical over-pressure events. This SPST normally closed switch features a factory-set 350 PSI cut-out and an automatic 250 PSI cut-in, making it an essential component for maintaining system safety in R410A refrigeration and heavy-duty air conditioning applications. Built with tamper-proof construction, this Klixon 4-series equivalent ensures long-term stability by eliminating field-adjustment errors. The compact, lightweight design allows for direct mounting on tubing via a 1/4 inch female flare S.A.E. connection with a built-in deflator. Whether you are troubleshooting a fixed high pressure switch failure or performing a standard retrofit, this hermetically sealed sensor handles up to 6 amps at 240V and includes 18-inch leads for straightforward wiring into the control circuit.
Key Benefits for Contractors:- Automatic Reset Logic: Restores circuit continuity once pressure drops to 250 PSI, reducing unnecessary manual service resets.
- Direct Tubing Mount: Features a 1/4" female flare fitting that threads directly onto the service port for a fast, leak-resistant installation.
- Severe Duty Rating: Rated for up to 100,000 cycles, providing consistent performance in demanding commercial HVACR cycles.
- R-410A Compatibility: Specifically engineered to handle the higher operating pressures associated with modern refrigerants.
What is the reset behavior of the MARS 43327?
This is an automatic reset pressure switch. It will open the circuit (Cut-Out) when system pressure reaches 350 PSI and will automatically close the circuit (Cut-In) once the pressure falls back to 250 PSI.
Can this switch be used on the suction side?
No, with a 350 PSI opening point, this is strictly a high pressure cut-out switch. Using it on the low-pressure side would result in the system never cycling properly under standard cooling parameters.
Does it require a mounting bracket?
No, the compact peanut switch design is intended for direct mounting to the refrigerant line, minimizing vibration fatigue on the 18-inch wire leads.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
For service calls involving high-side protection, the MARS 43327 Pressure Switch is a reliable HVAC high pressure cut-out designed to prevent compressor damage during critical over-pressure events. This SPST normally closed switch features a factory-set 350 PSI cut-out and an automatic 250 PSI cut-in, making it an essential component for maintaining system safety in R410A refrigeration and heavy-duty air conditioning applications. Built with tamper-proof construction, this Klixon 4-series equivalent ensures long-term stability by eliminating field-adjustment errors. The compact, lightweight design allows for direct mounting on tubing via a 1/4 inch female flare S.A.E. connection with a built-in deflator. Whether you are troubleshooting a fixed high pressure switch failure or performing a standard retrofit, this hermetically sealed sensor handles up to 6 amps at 240V and includes 18-inch leads for straightforward wiring into the control circuit.
Key Benefits for Contractors:- Automatic Reset Logic: Restores circuit continuity once pressure drops to 250 PSI, reducing unnecessary manual service resets.
- Direct Tubing Mount: Features a 1/4" female flare fitting that threads directly onto the service port for a fast, leak-resistant installation.
- Severe Duty Rating: Rated for up to 100,000 cycles, providing consistent performance in demanding commercial HVACR cycles.
- R-410A Compatibility: Specifically engineered to handle the higher operating pressures associated with modern refrigerants.
What is the reset behavior of the MARS 43327?
This is an automatic reset pressure switch. It will open the circuit (Cut-Out) when system pressure reaches 350 PSI and will automatically close the circuit (Cut-In) once the pressure falls back to 250 PSI.
Can this switch be used on the suction side?
No, with a 350 PSI opening point, this is strictly a high pressure cut-out switch. Using it on the low-pressure side would result in the system never cycling properly under standard cooling parameters.
Does it require a mounting bracket?
No, the compact peanut switch design is intended for direct mounting to the refrigerant line, minimizing vibration fatigue on the 18-inch wire leads.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
