Temperature Limit Controller – Close on Rise, SPST – 90°F Close / 80°F Open – Auto Reset

Maintain safe and efficient temperature control in heating, ventilation, and fan-driven systems with this Close-on-Rise Temperature Limit Controller. Designed for automatic operation, this SPST (Single-Pole, Single-Throw) control closes at 90°F and reopens at 80°F, ensuring reliable fan activation and shutdown based on ambient air temperature. Ideal for fan controls, HVAC systems, greenhouse heating, and equipment requiring automatic thermal switching, this controller improves system efficiency and protects components from overheating.

Key Features

• Close-on-Rise Switching – Closes at 90°F to activate fans or equipment as temperatures rise

• Automatic Reset – Reopens at 80°F for reliable, hands-free cycling

• SPST Contact Form – Simple, high-reliability control for a wide range of applications

• High Electrical Capacity – Rated for resistive and inductive HVAC loads

• Surface-Mount Installation – Easy mounting with standard hole spacing

• Durable Construction – Designed for continuous-use heating environments

• Improves Efficiency – Ensures fans only run when necessary to save energy

Specifications

• Product Type: Temperature Limit Controller

• Application: Fan control / HVAC thermal management

• Switch Action: Close on rise

• Contact Form: SPST

• Reset Type: Automatic

• Closing Temperature: 90°F

• Opening Temperature: 80°F

• Temperature Differential: 10°F

Electrical Ratings

• Input Voltage: 120V AC / 240V AC

• Pilot Duty: 125 VA

• Resistive Load: 25 A @ 120V AC; 25 A @ 240V AC; 21.6 A @ 277V AC

• Inductive Load: 14 A @ 120V; 10 A @ 240V

Mounting & Dimensions

• Mounting Style: Surface mount

• Mounting Hole Diameter: 1/8"

• Hole Spacing: 1-5/8" center to center

• Base Length: 2"

• Base Width: 1-5/8"

• Overall Height: 1-1/2"

• Overall Width: 1-5/8"

• Overall Depth: 2-1/8"

• Face Diameter: 2"

• Terminal Type: 1/4" spade connectors

Compliance & Additional Information

• Standards: cULus Recognized

• IP Rating: Not rated

• Weight: 0.7 oz

• UNSPSC: 39121510

Why Choose This Temperature Limit Controller?

A failing or inaccurate thermal switch can lead to poor efficiency, overheating risks, and premature system wear. This temperature limit controller helps ensure safe, efficient, and reliable fan cycling, protecting both your heating system and overall performance.