
MARS 43370 Pressure Switch
The MARS 43370 Pressure Switch is a mission-critical fan cycling switch designed for precision condenser control in high-performance cooling systems. This SPST open fall switch features fixed settings of 180/240 PSI, specifically engineered to open on a pressure drop to 180 PSI and close on a pressure rise to 240 PSI. This sequence ensures optimal head pressure regulation, preventing compressor short-cycling and maintaining system efficiency during low ambient conditions. Built for the rigors of field use, this high pressure cut-out includes a hermetically sealed sensor and tamper-proof construction for long-term reliability in the most demanding HVACR environments.
The unit comes with 1/4 inch female flare S.A.E. mounting for direct attachment to system tubing, eliminating the need for complex capillary runs. Rated for 6 amps at 24-240 volts, the MARS 43370 is compatible with R410A and legacy refrigerants, making it a versatile choice for commercial HVAC pressure control service calls. Every 18-inch lead is factory-terminated to streamline wiring and reduce installation time for technicians.
Key Benefits
- Optimized Fan Cycling: Precise 180/240 PSI setpoints ensure stable head pressure in low ambient temperatures.
- Broad Compatibility: Rated for use with modern R410A systems and critical 120/240V circuits.
- Direct Tubing Mount: The 1/4" female flare fitting allows for quick, leak-resistant direct mounting.
- Industrial Durability: Hermetically sealed design protects internal contacts from moisture and debris.
- Compact Footprint: Lightweight architecture fits within tight condenser housing constraints.
Common Questions
What is the reset logic for the MARS 43370?
This switch operates on an open fall logic, meaning it breaks the circuit when pressure drops to 180 PSI and automatically resets (closes) when pressure rises back to 240 PSI.
Can this switch be used for R410A applications?
Yes, the MARS 43370 is fully compatible with the higher operating pressures of R410A refrigerants as well as standard CFC/HCFC systems.
Is this a manual or automatic reset switch?
This is an automatic reset pressure control, ideal for fan cycling applications where the system must resume operation once safe head pressure is achieved.
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: $65.91
-65%$65.91
$23.07MARS 43370 Pressure Switch
The MARS 43370 Pressure Switch is a mission-critical fan cycling switch designed for precision condenser control in high-performance cooling systems. This SPST open fall switch features fixed settings of 180/240 PSI, specifically engineered to open on a pressure drop to 180 PSI and close on a pressure rise to 240 PSI. This sequence ensures optimal head pressure regulation, preventing compressor short-cycling and maintaining system efficiency during low ambient conditions. Built for the rigors of field use, this high pressure cut-out includes a hermetically sealed sensor and tamper-proof construction for long-term reliability in the most demanding HVACR environments.
The unit comes with 1/4 inch female flare S.A.E. mounting for direct attachment to system tubing, eliminating the need for complex capillary runs. Rated for 6 amps at 24-240 volts, the MARS 43370 is compatible with R410A and legacy refrigerants, making it a versatile choice for commercial HVAC pressure control service calls. Every 18-inch lead is factory-terminated to streamline wiring and reduce installation time for technicians.
Key Benefits
- Optimized Fan Cycling: Precise 180/240 PSI setpoints ensure stable head pressure in low ambient temperatures.
- Broad Compatibility: Rated for use with modern R410A systems and critical 120/240V circuits.
- Direct Tubing Mount: The 1/4" female flare fitting allows for quick, leak-resistant direct mounting.
- Industrial Durability: Hermetically sealed design protects internal contacts from moisture and debris.
- Compact Footprint: Lightweight architecture fits within tight condenser housing constraints.
Common Questions
What is the reset logic for the MARS 43370?
This switch operates on an open fall logic, meaning it breaks the circuit when pressure drops to 180 PSI and automatically resets (closes) when pressure rises back to 240 PSI.
Can this switch be used for R410A applications?
Yes, the MARS 43370 is fully compatible with the higher operating pressures of R410A refrigerants as well as standard CFC/HCFC systems.
Is this a manual or automatic reset switch?
This is an automatic reset pressure control, ideal for fan cycling applications where the system must resume operation once safe head pressure is achieved.
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
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Description
The MARS 43370 Pressure Switch is a mission-critical fan cycling switch designed for precision condenser control in high-performance cooling systems. This SPST open fall switch features fixed settings of 180/240 PSI, specifically engineered to open on a pressure drop to 180 PSI and close on a pressure rise to 240 PSI. This sequence ensures optimal head pressure regulation, preventing compressor short-cycling and maintaining system efficiency during low ambient conditions. Built for the rigors of field use, this high pressure cut-out includes a hermetically sealed sensor and tamper-proof construction for long-term reliability in the most demanding HVACR environments.
The unit comes with 1/4 inch female flare S.A.E. mounting for direct attachment to system tubing, eliminating the need for complex capillary runs. Rated for 6 amps at 24-240 volts, the MARS 43370 is compatible with R410A and legacy refrigerants, making it a versatile choice for commercial HVAC pressure control service calls. Every 18-inch lead is factory-terminated to streamline wiring and reduce installation time for technicians.
Key Benefits
- Optimized Fan Cycling: Precise 180/240 PSI setpoints ensure stable head pressure in low ambient temperatures.
- Broad Compatibility: Rated for use with modern R410A systems and critical 120/240V circuits.
- Direct Tubing Mount: The 1/4" female flare fitting allows for quick, leak-resistant direct mounting.
- Industrial Durability: Hermetically sealed design protects internal contacts from moisture and debris.
- Compact Footprint: Lightweight architecture fits within tight condenser housing constraints.
Common Questions
What is the reset logic for the MARS 43370?
This switch operates on an open fall logic, meaning it breaks the circuit when pressure drops to 180 PSI and automatically resets (closes) when pressure rises back to 240 PSI.
Can this switch be used for R410A applications?
Yes, the MARS 43370 is fully compatible with the higher operating pressures of R410A refrigerants as well as standard CFC/HCFC systems.
Is this a manual or automatic reset switch?
This is an automatic reset pressure control, ideal for fan cycling applications where the system must resume operation once safe head pressure is achieved.
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.












