Description
Product Summary
The Supco SMR375 Pressure Switch is a professional-grade replacement part from Supco (Sealed Unit Parts Co.), a trusted name in HVAC/R and appliance parts since 1945. High precision controls at economical prices. Encapsulated, non-adjustable, single pole - single throw, direct mount switches for use with HFC, HCFC, and CFC refrigerants.
Pressure switches protect HVAC and refrigeration systems by opening the circuit when pressures move outside a safe range. This group covers high and low pressure controls, fan-cycling switches, manual-reset safeties, and furnace air (draft inducer) proving switches. Match the cut-in/cut-out settings, connection type, and contact configuration to the application.
Key Features
- ¼" SAE 45° female flare fitting with valve core depressor
- Excellent set point repeatability/stability
- Life at rated load: 100,000 cycles
- Manual reset high pressure
- Rated Voltage 24/120/240 VAC @ 50/60 Hz
- Compatible with all refrigerants (including the new A2L refrigerants)
- Wire is 18 AWG, 18" long
- WARNING: Prop 65 info
Specifications
| Brand | Supco |
|---|---|
| Part Number | SMR375 |
| Part Type | Pressure Switch |
| Maximum FLA | 5.8 Amps @ 120VAC |
| Maximum FLA | 2.9 Amps @ 240VAC |
| Maximum LRA | 34.8 Amps @ 120VAC |
| Maximum LRA | 17.4 Amps @ 240VAC |
| Ambient Temperature | -31°F to 149°F (-31°C to 65°C) |
| Fluid Temperature | -31°F to 275°F (-35°C to 135°C) |
| Open PSI | 375 PSI |
| Tolerance | +/- 15 PSI |
| Burst Pressure | 1521 PSI |
| DC Voltage | 6Vdc/12Vdc/36Vdc |
| Agency Approvals | UL® Recognized, CE® |
Cross Reference
The Supco SMR375 is a direct replacement for the following OEM and competitor part numbers. Always verify ratings and fit against the original part before installing.
| Replaces Part # | Manufacturer | Description |
|---|---|---|
| 43312 | Mars® | |
| P100DC3C | Johnson Ctrls® | |
| MPH7109 | Ranco® |
Frequently Asked Questions
Do these carry any certifications/approvals?
Yes, they are UL® Recognized, and CE® Certified.
What is the difference between the part numbers?
It is the PSI rating the switches operate.
Do we carry anything for use with DC voltage?
No, just AC at this time.
Do we offer any custom made to our specs swithces?
No, we do not.
Can these switches be used in a 460V application?
No, the maximum voltage is 240VAC.
White Paper
What's Included
- (1) Supco SMR375 Pressure Switch
Safety: Always disconnect power and follow lockout/tagout procedures before servicing electrical components. Installation should be performed by a qualified technician.
