White-Rodgers 3L11-85 Limit Switch

The White-Rodgers 3L11-85 is a professional-grade 1/2" bimetal disc limit switch engineered for precision temperature regulation in HVACR systems and commercial appliances. Functioning as a high-limit safety or temperature control, this 36T21-10843 model features a fixed temperature range of 80 to 90 degrees F. The SPST switch action is designed to open on rise, effectively interrupting the electrical circuit when the upper thermal threshold is reached to prevent equipment overheating. With a 15-degree F differential temperature, the device utilizes an auto reset mechanism to restore connectivity once the system cools to safe operating levels. This compact snap disc thermostat is housed in an aluminum disc cup with a stainless steel mounting bracket and 1/4-inch quick-connect terminations, ensuring a secure fit and reliable electrical contact. Its 15A at 120VAC rating makes it a versatile OEM replacement for maintaining thermal protection in furnaces, blowers, and air handling units.

• Precise Thermal Control: Fixed 80-90°F operating range ensures accurate limit switch response for low-temperature applications.
• Automated System Recovery: Integrated auto reset functionality reduces drivetrain downtime by self-restoring the circuit after a 15°F drop.
• Durable Construction: Features a bimetal disc design and high-speed contact separation for enhanced component longevity in high-cycle environments.
• Standards Compliance: UL listed and CSA certified for professional installation in mission-critical furnace safety circuits.
• Universal Mounting: Equipped with a loose-ring stainless steel bracket to accommodate standard 3/4-inch or surface-mount configurations.

Is the 3L11-85 suitable for fan control?
No, this unit is an "L" (Limit) series open on rise switch. For fan applications requires a "close on rise" (F-series) control to activate a blower as temperatures increase.

What are the electrical load limits for this part?
The switch is rated for resistive loads up to 15A at 120VAC and 10A at 240VAC. For inductive motor loads, it supports 3.0 FLA at 120VAC.

Can I manually adjust the cut-out temperature?
No, this model features a fixed temperature setting. If your application requires variable setpoints, a capillary-style or adjustable limit control should be utilized.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.