Supco SFC150225 Fan Cycle Switch, SPST, 150 Open/225 Close PSI

Description

The Supco SFC150225 is a single-pole, single-throw (SPST) fan cycle switch engineered for precise head pressure control in air conditioning and refrigeration systems. Designed to close on pressure rise, this switch activates the condenser fan motor when system pressure climbs to the cut-in set point, and de-energizes it when pressure drops to the cut-out set point — maintaining optimal operating pressures across varying ambient conditions.

Key Specifications

• Model: SFC150225
• Switch Type: SPST (Single-Pole, Single-Throw)
• Action: Close on Pressure Rise
• Cut-Out (Open) Pressure: 150 PSI
• Cut-In (Close) Pressure: 225 PSI
• Brand: Supco

How It Works

The SFC150225 monitors refrigerant head pressure on the high side of the system. When pressure rises to 225 PSI, the switch closes and energizes the condenser fan circuit. When pressure falls to 150 PSI, the switch opens and shuts off the fan. This cycling action prevents head pressure from dropping too low in cold ambient conditions, protecting compressor efficiency and system reliability.

Applications

• Condenser fan cycling on air-cooled condensing units
• Commercial refrigeration systems
• Air conditioning equipment requiring head pressure control
• Low-ambient temperature operation

Features & Benefits

• Factory-set pressure cut-out and cut-in points for drop-in replacement convenience
• SPST design simplifies wiring and integration into existing fan circuits
• Closes on pressure rise — ideal for condenser fan motor control
• Durable construction suitable for demanding HVAC/R environments
• Direct replacement for compatible Supco fan cycle switch applications