Supco STC5333 Thermal Cutoff

The Supco STC5333 Thermal Cutoff is a critical non-resettable safety device designed for high-limit temperature protection in various commercial and residential heating applications. Engineered to fail-safe and open the circuit when ambient temperatures reach the 333°F (167°C) trip point, this TCO ensures equipment integrity and prevents hazardous overheating conditions. This specific component serves as a direct O.E.M. equivalent for 460-548-000, maintaining identical form, fit, and electrical specifications for seamless field replacement. When diagnosing HVAC high-limit switch failure or performing thermal fuse replacement, verifying the amperage rating and temperature threshold is vital. The STC5333 is built for reliability in high-cycle environments, providing a permanent circuit break upon thermal activation. This thermal cutoff assembly is a standard inventory item for contractors servicing appliances, electric heaters, and specialized HVAC equipment requiring precise thermal overload protection and high-temperature safety cutouts.

• Precise Thermal Response: Precisely calibrated to open at 333°F (167°C) to prevent catastrophic component failure.
• Direct Cross-Reference: Identical performance and footprint to the 460-548-000, reducing downtime during emergency repairs.
• Rugged Construction: Designed to withstand the demanding electrical loads and environmental stresses of commercial HVACR systems.
• Safety Compliance: Meets industry standards for high-limit protection, ensuring the system returns to original safety specifications.

What causes a thermal cutoff like the STC5333 to trip?
A trip is usually the result of a secondary failure, such as a localized overheat, restricted airflow, or a malfunctioning primary thermostat. Because this is a non-resettable fuse, the underlying heat source must be corrected before replacing the part.

Can the STC5333 be used in place of a lower-temperature fuse?
No. Always match the temperature rating specified by the equipment manufacturer. Using a higher-rated TCO can bypass critical safety margins and create fire hazards.

Is this part compatible with multiple brands?
Yes, while it is a direct cross for the 460-548-000, it is used across various platforms that require a 167°C thermal link. Always verify the physical dimensions and termination type before installation.

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.