Supco SHF110DC Snap Disc Auto Reset Fan Switch, 110°F Cut-In, Deep Cup

Description

Overview

The Supco SHF110DC is a precision-engineered snap disc fan switch designed for reliable temperature-based fan control in HVAC and appliance applications. Featuring a fixed 110°F cut-in temperature and a fixed 90°F cut-out temperature, this auto-reset switch activates the fan circuit as temperatures rise and automatically resets when temperatures fall — requiring no manual intervention. The close-on-rise switch action ensures the fan engages at the appropriate threshold to protect equipment and maintain system efficiency. The deep cup design provides enhanced thermal contact with mounting surfaces, delivering accurate and consistent response to temperature changes.

Key Features

• Fixed 110°F (43°C) cut-in temperature — fan circuit closes as temperature rises
• Fixed 90°F (32°C) cut-out temperature — fan circuit opens as temperature falls
• Close-on-rise switch action for positive fan engagement at set point
• Snap disc mechanism provides fast, positive switching with no contact bounce
• Auto reset operation — no manual reset required after activation
• Deep cup design for improved thermal contact and accurate temperature sensing
• Compact, durable construction suited for OEM and replacement applications

Typical Applications

• Furnace and air handler fan control
• Appliance temperature-activated fan switching
• HVAC equipment OEM and aftermarket replacement
• Refrigeration and heating system fan sequencing

Why Choose the Supco SHF110DC

Supco is a trusted name in HVAC and appliance controls, and the SHF110DC reflects that reputation for quality and dependability. The snap disc design delivers a crisp, repeatable switching action that outperforms bimetal alternatives in demanding thermal cycling environments. Auto reset functionality minimizes service calls and downtime, while the deep cup construction ensures the switch responds accurately to real-world surface temperatures. Whether used as a direct OEM replacement or in a new installation, the SHF110DC delivers consistent performance cycle after cycle.