Description:
The TCO (Thermal Cut-Off) responds to temperature by interrupting an electrical circuit when the operating and/or environ‐
mental temperature exceeds the thermal rating of the device. NTE's radial lead TCOs accomplish this when the internal
fusible alloy is melted by reaching the temperature of the melting point of the alloy, forming two separate balls at the edges
of the leads by surface tension of the alloy to permanently open the circuit.
Axial-lead TCO devices presently predominate over radial-lead devices. This results, at least in part, from design diffi‐
culties that exist in manufacturing a reliable, inexpensive radial-lead TCO device. However, in many circuit applications
radial-lead devices are preferable since they take up a smaller area on a printed circuit board. Their compact size enables
ease of assembly into the smallest of transformers ensuring total thermal protection
Features
Maximum Rating: 5 Amps, 250 Volts
Full 2 3/4” leads to fit all replacement configurations
All types meet the requirements of Underwriters Laboratories Specifications and CUL
RoHS Compliant
Note 1. Temperature sensitive devices. Do not store above +48°C (+120°F).
Note 2. With proper air flow, heat generation below 5 Amps is minimal, above 5 Amps the upper limit on the currentcapac‐
ity will depend on the environment for each specific application.
Note 3. A general rule of thumb for continuous operating temperature for thermal cut-offs is 30°C less than the Maximum
Opening Temperature.
Functioning/Opening
Temperature 76°C 168°F