Supco SLP90120 Low Pressure Switch 90 PSI Open 120 PSI Close HVAC Refrigeration

The Supco SLP90120 is a high-precision, non-adjustable low pressure switch designed for HVAC and refrigeration systems. This encapsulated single pole, single throw (SPST) switch opens on pressure fall and features automatic reset functionality for reliable system protection.

Key Features:

• Opens at 90 PSI, closes at 120 PSI for precise pressure control
• 1/4" SAE 45° female flare fitting with integrated valve core depressor
• Compatible with all refrigerants including HFC, HCFC, CFC, and new A2L refrigerants
• Rated voltage: 24/120/240 VAC @ 50/60 Hz (6 RLA, 36 LRA)
• Snap-acting stainless steel hermetically sealed sensor for durability
• Rated for 100,000 cycles at full load
• 18 AWG wire, 18 inches long for easy installation
• Compact, lightweight design for direct mounting

Specifications:

• Operating pressure range: 0 to 650 PSI
• Burst pressure: 5000 PSI
• Ambient temperature range: -30°F to 176°F (-30°C to 80°C)
• Fluid temperature range: -50°F to 250°F (-50°C to 120°C)
• UL Recognized and CE certified

This switch is ideal for air conditioning systems, heat pumps, and refrigeration equipment requiring reliable low-pressure monitoring. The hermetically sealed sensor ensures excellent set point repeatability and long-term stability. Replaces Mars 43375.