72R0050 Red Dot Air Sensing Switch – Normally Closed

Description

The Red Dot 72R0050 Air Sensing Switch is a reliable, normally closed pressure switch used to monitor air system pressure in heavy-duty truck applications. Designed to open at 25 PSI, this switch helps ensure proper system operation and dependable performance in demanding environments.

Built with a male 1/8″-27 NPTF fitting, the 72R0050 installs easily into standard air system ports. It is widely used on Peterbilt 357, 375, 376, 377, 378, and 379 conventional trucks, as well as various Mack models, making it a trusted replacement option across multiple fleets.

Manufactured to Red Dot quality standards, this air sensing switch delivers consistent pressure response, long service life, and dependable operation in commercial truck HVAC and air control systems.

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Product Specifications

• Red Dot Part No.: 72R0050

• Red Dot Factory Part No.: RD-5-4475-0P

• Type: Air Sensing Pressure Switch

• Operation: Normally Closed

• Opens At: 25 PSI

• Fitting Style: Male 1/8″-27 NPTF

• Application:

  • Peterbilt 357, 375, 376, 377, 378, 379 (Conventional Models)

  • Select Mack Models

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Cross-Reference / Interchange Numbers

Aftermarket & OEM References:
03-00050, 19-2605, 2005, 20826-1383, 232-8597, 29-30176, 4379-RD544750, 4379-RD544750P, 60090-4408, 72R0050, 850-6551, 928-1105, ABP N83 322395, BA12250, E-807980, RD-5-4475-0P, RDHRD544750P, RDT72R0050, SWI4105

Brand References:

• AirSource / MEI: 2005

• Alliance: ABP N83 322395

• Bergstrom: 651021

• Climatech: BA1225, BA12250

• CoolStar / MEI: 928-1105

• Euclid: E-807980

• Freightliner: 1749-1907

• Kysor: 2212006, 223152

• Mack: 4379-RD544750

• Omega: 29-30176

• Truck Air / MEI: 11-0628, 19-2605

• Volvo: 20826-1383

• Western Star: 60090-4408

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