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Small grey metal pressure switch with brass port and black adjustment cover

SQUARE D

SQUARE D 9013FH 135-175 psi pressure switch

SKU CH-MXVD-FFXJ1

Pressure switch for air compressors, factory set at 135 to 175 psi with a 40 psi differential

  • TypeLight Switch
  • Factory-set 135-175 psi range suits common compressor duties
  • 40 psi differential prevents short-cycling and extends motor life
  • DPST contacts handle 1.5 hp at 120 V and 2 hp at 240 V single-phase
  • NEMA 1 enclosure protects contacts in dry indoor locations
  • 1/4 in FNPS port and unloader valve simplify plumbing and reduce startup load

Air Compressor Pressure Switch

This Square D 9013FH pressure switch controls air compressors in automotive and workshop environments. It manages motor operation through automatic and manual off positions with a factory-set range of 135 to 175 psi. The switch features a single 1/4 inch FNPS port and an integrated unloader valve for simplified installation.

Operating Limits and Electrical Ratings

The switch operates within a broader adjustable range of 60 to 200 psi with a fixed 40 psi differential between cut-in and cut-out pressures. Electrical contact form is DPST with a NEMA 1 enclosure rating. Motor load ratings include 1.5 hp at 120 V single-phase, 2 hp at 240 V single-phase, 3 hp at 240 V three-phase and 1 hp at 480 V three-phase.

Replacement and Upgrade Context

This unit replaces worn or failed pressure switches on existing air compressor systems where the 135 to 175 psi factory setting matches the original specification. The jump is worth it when the unloader valve function is needed to reduce motor starting load or when the NEMA 1 rating suits the installation environment. It does not serve applications requiring higher pressure ranges, different port configurations or outdoor-rated enclosures.

Highlights

  • Factory-set 135-175 psi range suits common compressor duties
  • 40 psi differential prevents short-cycling and extends motor life
  • DPST contacts handle 1.5 hp at 120 V and 2 hp at 240 V single-phase
  • NEMA 1 enclosure protects contacts in dry indoor locations
  • 1/4 in FNPS port and unloader valve simplify plumbing and reduce startup load

Specifications

BrandSquare D
TypeLight Switch

Questions about this item

Which pressure range fits my compressor that cuts in at 135 psi and out at 175 psi?

This switch is factory set to cut in at 135 psi and cut out at 175 psi, matching that exact range.

What does the 40 psi differential mean when the switch is running on my compressor?

The 40 psi differential is the fixed gap between cut in and cut out, so the motor starts at 135 psi and stops at 175 psi.

My compressor runs on 240 V single phase — will the 9013FH handle the motor load?

At 240 V single phase the switch is rated for 2 hp, covering typical compressor motors at that voltage.

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