MARS 43316 Switch

The MARS 43316 High Pressure Switch is a heavy-duty manual reset safety control engineered for refrigeration and air conditioning systems. This SPST N/C (Single Pole Single Throw, Normally Closed) switch is factory-set to trip at 475 PSI, providing reliable protection for compressors and condensers by opening the circuit upon a significant pressure rise. Built for longevity in the field, it features a hermetically sealed sensor and a tamper-proof design that prevents unauthorized setpoint changes, ensuring system stability under varying thermal loads. The 43316 includes a 48-inch black PVC wire lead with 1/2" stripped ends for simplified wiring into control circuits, and a 1/4" female flare fitting with a built-in deflator for direct mounting to service valves. Supporting voltages from 24V to 250V and rated up to 6 amps, this 475 PSI pressure switch is an essential component for any HVAC high pressure cut out application where manual intervention is required to restart operations after a high-limit event.

Key Benefits:

• Fail-Safe Protection: The manual reset mechanism forces a technician to inspect the system before restarting, preventing equipment damage from recurring faults.
• Wide Compatibility: Rated for use in circuits ranging from 24V to 250V, making it suitable for both residential and commercial HVACR equipment.
• Durable Construction: Features a hermetically sealed sensor that resists moisture and contaminants, maintaining high-quality pressure monitoring accuracy.
• Simplified Installation: The 48-inch lead length and 1/4" female flare connection allow for flexible positioning and rapid replacement in tight service areas.

Common Questions:

What is the trip point for the MARS 43316?
This switch is designed to open on a pressure rise at 475 PSI with a range of +/- 10 PSI, acting as a critical high-limit safety cut-out.

Can this switch be used on the low side of the system?
No, the MARS 43316 is specifically calibrated as a high pressure switch. Using it for low-side monitoring will not provide the necessary protection for the compressor.

Does this switch automatically close when pressure drops?
This model is a manual reset SPST N/C switch. Once the pressure hits 475 PSI and the contacts open, a technician must manually press the reset button to close the circuit, even after the pressure returns to normal levels.

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.