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Square D 9012G pressure switch, compact metal housing, 1/4-18 FNPT port, NEMA 4/4X/13 rating

SQUARE D

SQUARE D 9012G Pressure Switch 20-675PSI Adj 4/4X/13

SKU CH-73RX-Q03Z9

Adjustable pressure switch with a 20 to 675 psi range and NEMA 4, 4X, 13 enclosure

  • TypeLight Switch
  • Adjustable 20 to 675 psi range suits varied pressure systems
  • Diaphragm actuation delivers reliable switching across 27 to 130 psi differential
  • NEMA 4, 4X and 13 ratings protect against water, dust and oil ingress
  • 1/4-18 NPT female port enables direct pipeline connection
  • AC contacts rated 6 A at 120 V and 3 A at 240 V handle motor loads

Pressure Switch for Industrial Control

The Square D 9012G pressure switch handles a working range of 20 to 675 psi with a differential of 27 to 130 psi. It is built for engineers and maintenance teams who need reliable actuation in hydraulic or pneumatic systems. The diaphragm mechanism provides standard action for automatic pressure monitoring.

NEMA 4 4X 13 Enclosure Benefits

The switch carries NEMA ratings 4, 4X and 13, meaning the housing resists water ingress, corrosion and oil or coolant spray. This protection allows installation in wash-down areas, outdoor enclosures or machine-tool environments where lesser switches would fail. The 1/4-18 FNPT port connects directly to standard pressure lines.

Wiring and Installation Notes

Contacts are rated 6 A at 120 V AC, 3 A at 240 V AC, 0.22 A at 125 V DC and 0.27 A at 250 V DC in a 1NO/1NC configuration. Installers must verify that the control circuit stays within these limits to avoid contact welding. The adjustable range requires a pressure source for calibration; incorrect setting is the most common cause of nuisance trips.

Highlights

  • Adjustable 20 to 675 psi range suits varied pressure systems
  • Diaphragm actuation delivers reliable switching across 27 to 130 psi differential
  • NEMA 4, 4X and 13 ratings protect against water, dust and oil ingress
  • 1/4-18 NPT female port enables direct pipeline connection
  • AC contacts rated 6 A at 120 V and 3 A at 240 V handle motor loads

Specifications

BrandSquare D
TypeLight Switch

Questions about this item

How often does the diaphragm on the 9012G need inspection or replacement?

The switch uses a diaphragm actuation design; inspect it during routine system maintenance and replace it if pressure response becomes inconsistent or if fluid leaks appear at the 1/4-18 FNPT port.

What pressure limit stops the 9012G from operating if the system runs continuously at high load?

The adjustable range tops out at 675 psi; sustained pressure above that value exceeds the calibrated span and will prevent reliable switching.

How much heat does the 9012G generate when it cycles all day on a 120 V circuit?

At 6 A / 120 V the contacts dissipate minimal heat; the NEMA 4/4X/13 enclosure is rated for indoor and outdoor use without additional cooling.

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