
MARS 43350 Pressure Switch
The MARS 43350 Pressure Switch is a heavy-duty low pressure control designed for precise refrigeration and HVAC system protection. Engineered as a SPST auto reset switch, this Klixon-style component features a factory-set cut-out pressure of 40 PSI and a cut-in pressure of 80 PSI. The 1/4" female flare S.A.E. mounting allows for direct connection to tubing, eliminating the need for bulky capillary tubes and reducing potential leak points. With contacts rated at 6 amps for 24V to 240V applications, it provides reliable switch action for a wide range of residential and commercial equipment, including R410A systems. The hermetically sealed sensor and tamper-proof construction ensure consistent performance in demanding environments. This HVAC pressure switch includes 18-inch blue XLP leads with 1/2-inch stripped ends for streamlined wiring during field replacement or new installations.
Key Benefits- Automatic Reset: Resumes operation once system pressure rises to 80 PSI, ensuring minimal downtime.
- Compact Direct Mount: The 1/4" female flare connection with internal deflator simplifies installation on standard service valves.
- Broad Voltage Range: Rated for use across 24V, 120V, and 240V circuits to handle diverse control configurations.
- Robust Environmental Protection: Hermetically sealed design resists moisture and contaminants.
- High Cycle Life: Engineered for over 100,000 cycles at rated current for long-term operational stability.
Is this switch compatible with R410A systems?
Yes, the MARS 43350 is designed to handle the high-pressure requirements and specific oil types associated with R410A and traditional refrigerants.
Does this switch open or close on pressure rise?
This is an "Open on Fall" (Close on Rise) switch. It breaks the circuit when pressure drops to 40 PSI and closes it when pressure reaches 80 PSI.
Can this be used for high-side protection?
No, this model is specifically calibrated for low-pressure monitoring; high-side applications require a switch with significantly higher cut-out thresholds.
This item is not eligible for free shipping.
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.
Original: $53.86
-65%$53.86
$18.85MARS 43350 Pressure Switch
The MARS 43350 Pressure Switch is a heavy-duty low pressure control designed for precise refrigeration and HVAC system protection. Engineered as a SPST auto reset switch, this Klixon-style component features a factory-set cut-out pressure of 40 PSI and a cut-in pressure of 80 PSI. The 1/4" female flare S.A.E. mounting allows for direct connection to tubing, eliminating the need for bulky capillary tubes and reducing potential leak points. With contacts rated at 6 amps for 24V to 240V applications, it provides reliable switch action for a wide range of residential and commercial equipment, including R410A systems. The hermetically sealed sensor and tamper-proof construction ensure consistent performance in demanding environments. This HVAC pressure switch includes 18-inch blue XLP leads with 1/2-inch stripped ends for streamlined wiring during field replacement or new installations.
Key Benefits- Automatic Reset: Resumes operation once system pressure rises to 80 PSI, ensuring minimal downtime.
- Compact Direct Mount: The 1/4" female flare connection with internal deflator simplifies installation on standard service valves.
- Broad Voltage Range: Rated for use across 24V, 120V, and 240V circuits to handle diverse control configurations.
- Robust Environmental Protection: Hermetically sealed design resists moisture and contaminants.
- High Cycle Life: Engineered for over 100,000 cycles at rated current for long-term operational stability.
Is this switch compatible with R410A systems?
Yes, the MARS 43350 is designed to handle the high-pressure requirements and specific oil types associated with R410A and traditional refrigerants.
Does this switch open or close on pressure rise?
This is an "Open on Fall" (Close on Rise) switch. It breaks the circuit when pressure drops to 40 PSI and closes it when pressure reaches 80 PSI.
Can this be used for high-side protection?
No, this model is specifically calibrated for low-pressure monitoring; high-side applications require a switch with significantly higher cut-out thresholds.
This item is not eligible for free shipping.
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.
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Product Information
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Shipping & Returns
Description
The MARS 43350 Pressure Switch is a heavy-duty low pressure control designed for precise refrigeration and HVAC system protection. Engineered as a SPST auto reset switch, this Klixon-style component features a factory-set cut-out pressure of 40 PSI and a cut-in pressure of 80 PSI. The 1/4" female flare S.A.E. mounting allows for direct connection to tubing, eliminating the need for bulky capillary tubes and reducing potential leak points. With contacts rated at 6 amps for 24V to 240V applications, it provides reliable switch action for a wide range of residential and commercial equipment, including R410A systems. The hermetically sealed sensor and tamper-proof construction ensure consistent performance in demanding environments. This HVAC pressure switch includes 18-inch blue XLP leads with 1/2-inch stripped ends for streamlined wiring during field replacement or new installations.
Key Benefits- Automatic Reset: Resumes operation once system pressure rises to 80 PSI, ensuring minimal downtime.
- Compact Direct Mount: The 1/4" female flare connection with internal deflator simplifies installation on standard service valves.
- Broad Voltage Range: Rated for use across 24V, 120V, and 240V circuits to handle diverse control configurations.
- Robust Environmental Protection: Hermetically sealed design resists moisture and contaminants.
- High Cycle Life: Engineered for over 100,000 cycles at rated current for long-term operational stability.
Is this switch compatible with R410A systems?
Yes, the MARS 43350 is designed to handle the high-pressure requirements and specific oil types associated with R410A and traditional refrigerants.
Does this switch open or close on pressure rise?
This is an "Open on Fall" (Close on Rise) switch. It breaks the circuit when pressure drops to 40 PSI and closes it when pressure reaches 80 PSI.
Can this be used for high-side protection?
No, this model is specifically calibrated for low-pressure monitoring; high-side applications require a switch with significantly higher cut-out thresholds.
This item is not eligible for free shipping.
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.












