No, thermal cutoffs are designed for single-use, non-resettable protection. Once the internal element melts, the circuit is permanently opened.
Thermal Cutoffs (TCO) Component Intelligence
Non-resettable thermal protection for critical safety applications.
What are Thermal Cutoffs (TCO) components?
Thermal cutoffs (TCOs) are one-time, non-resettable safety devices that open a circuit when a specific temperature threshold is exceeded. They are essential for preventing fire hazards in power supplies, heating elements, and battery packs where thermal runaway is a risk.
How to Choose Thermal Cutoffs (TCO) Components
Selecting the right TCO requires balancing thermal sensitivity with electrical load requirements.
Functioning Temperature
Define the precise temperature at which the device must trigger, accounting for ambient operating conditions.
Electrical Rating
Ensure the TCO's voltage and current ratings exceed the maximum circuit load to prevent nuisance tripping.
Mounting Style
Choose between axial lead, radial, or surface-mount packages based on your PCB layout and thermal coupling needs.
Response Time
Evaluate the thermal mass and physical contact requirements to ensure the TCO reacts fast enough to protect sensitive components.
Safety Certifications
Verify UL, CSA, or VDE compliance to meet regional safety standards for your end-product.
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