Square D 9013FHG59J52M1X Air Compressor Pressure Switch

Product Description

The SQUARE D 9013FHG59J52M1X is a diaphragm-actuated air compressor pressure switch designed to control an electrically driven air compressor within a power circuit. The switch cuts out at a fixed 125 PSI setting and features an adjustable cut-out range of 100 to 200 PSI, with a non-adjustable differential of 40 PSI. Electrical connections are screw terminal style with two 2-pole normally closed contacts that open on rising pressure. The cut-out threshold adjusts via a screw nut. Installed by licensed electricians or HVAC-R technicians, this switch suits compressor systems requiring reliable automated pressure control.

This pressure switch is rated for use with higher-horsepower motors of 2 HP or greater, making it appropriate for commercial-grade or heavy-duty residential air compressor installations. The 1/4 inch NPT external fluid connection provides a standard fitting interface for integration into existing compressor plumbing. The switch includes a 2-way pressure release valve and a maintained manual cut-out lever with auto and off positions, supporting controlled startup and manual override scenarios common in shop and industrial compressor setups.

Key Features

• Fixed cut-out setting at 125 PSI with adjustable cut-out range of 100 to 200 PSI
• Non-adjustable differential of 40 PSI for consistent pressure cycling
• Diaphragm-actuated mechanism with fixed differential and screw-nut threshold adjustment
• Two 2-pole normally closed contacts open on rising pressure via screw terminal connections
• 1/4 inch NPT external fluid connection for standard plumbing integration
• Includes 2-way pressure release valve and maintained manual cut-out lever with auto and off positions
• Rated for motors 2 HP or greater

Compatibility

Designed as an OEM-style replacement or upgrade switch for electrically driven air compressor systems requiring a 1/4 inch NPT pressure connection and rated for motors of 2 HP or greater.

Installation Notes

Installation should be performed by a licensed electrician following applicable NEC guidelines. De-energize the compressor circuit and bleed all system pressure before removing or installing the pressure switch. Ensure the NPT fitting threads are properly sealed with appropriate thread sealant rated for compressed air service. Verify the cut-out pressure setting matches the compressor tank rating before returning the system to service.