Mars 33350 Manual Reset Pressure Switch

Product Description

The MARS 33350 is a manual reset pressure switch designed for use in HVAC and refrigeration systems where reliable pressure protection is essential. This switch monitors system pressure and opens the circuit when pressure falls outside the acceptable operating range. Unlike automatic reset switches, the MARS 33350 requires a technician to manually reset the switch after a fault condition is cleared. This design prevents equipment from cycling back on without direct human intervention, reducing the risk of repeated compressor or equipment damage caused by unresolved pressure faults. HVAC technicians and refrigeration service professionals rely on manual reset pressure switches like this one to add a layer of protection to compressors, condensing units, and other refrigerant-circuit components. When a low-pressure or high-pressure event trips the switch, the system stays locked out until a qualified tech inspects the equipment and resets the control. This approach helps protect costly equipment and meets best practices for safe system operation. The MARS 33350 carries UL Recognized approval, confirming it meets established safety and performance standards used across the industry. Its compact form factor makes it easy to install in tight equipment compartments. With dimensions of 3 inches in length, 2.5 inches in width, and 1.3 inches in height, and a weight of approximately 0.15 pounds, this switch fits well in residential and light commercial HVAC applications. It ships as an individual unit and is manufactured in Mexico. HVAC service technicians, refrigeration mechanics, and equipment installers will find the MARS 33350 a dependable replacement or upgrade for existing pressure switch installations requiring manual reset functionality.

• Manual reset design keeps system locked out after a pressure fault until a technician inspects and resets the switch
• UL Recognized approval confirms compliance with industry safety and performance standards
• Compact size at 3 inches by 2.5 inches by 1.3 inches fits residential and light commercial HVAC equipment

Product Highlights

The MARS 33350 manual reset pressure switch provides reliable pressure fault protection for HVAC and refrigeration systems, requiring technician intervention before the system can restart after a trip event. Its UL Recognized rating and compact build make it a trusted choice for professional service and replacement applications.

Product Information

Standard Information

• Brand: MARS
• Manufacturer Part Number: 33350

Technical Specifications

• Switch Type: Manual Reset Pressure Switch
• Approvals: UL Recognized
• Length: 3 inches
• Width: 2.5 inches
• Height: 1.3 inches
• Weight: 0.15 pounds
• Country of Origin: Mexico
• Unit of Measure: Each
• UPC: 685744333500