Supco STC4283 291°F Thermal Cutoff

Description

Supco STC4283 291°F Thermal Cutoff Overview

The Supco STC4283 is a one-time, non-resettable thermal cutoff (TCO) designed to permanently interrupt an electrical circuit when the surrounding temperature reaches 291°F (approximately 144°C). Once triggered, the device must be replaced, ensuring that the root cause of overheating is addressed before equipment is returned to service. This makes the STC4283 an essential safety component in a wide range of HVAC systems and household appliances.

Key Features

• Preset trip temperature of 291°F (≈144°C) for precise overheat protection
• One-time, non-resettable design — permanently opens circuit upon activation
• Compact form factor for easy integration into tight equipment assemblies
• Manufactured by Supco, a trusted name in HVAC and appliance replacement components
• Direct replacement for OEM thermal cutoffs in compatible equipment

How Thermal Cutoffs Work

Thermal cutoffs contain a temperature-sensitive element that melts or activates at a specific temperature, permanently breaking the electrical circuit. Unlike thermal fuses that reset, a TCO is a single-use device — once it has opened, it must be replaced. This characteristic ensures that technicians inspect and correct the underlying overheating condition before the equipment is placed back in operation.

Common Applications

• Dryers and washing machines
• Electric heaters and heating elements
• HVAC blower and fan motor assemblies
• Refrigeration and appliance control circuits
• Any application requiring overheat protection at 291°F

Why Choose Supco?

Supco has been a leading supplier of replacement components for HVAC, refrigeration, and appliance industries for decades. Their thermal cutoffs are engineered to meet or exceed OEM specifications, providing reliable protection and long service life when used as directed.