Onetime thermal cutoffs with overtemperature protection What it is A oneshot thermal cutoff fuse designed to interrupt current when the device temperature exceeds a safe limit. It provides a safety shutdown to prevent damage and reduce fire risk. Protection function Nonresettable fuse that opens the circuit on overtemperature conditions. If activated, the device must be repaired or replaced. Working temperature Operating ambient temperature range: 50 C to 175 C. Suitable for equipment that experiences wide temperature variation. Key benefits Simple, reliable overtemperature protection without complex control logic. Helps protect power electronics, heating elements, and energy storage devices from thermal damage. Provides a clear safety cutoff to support compliance with safety standards. Compatibility and usage Suitable for integration into electronic assemblies, power supplies, battery packs, chargers, heating elements, and related equipment that require hard thermal cutoff protection. Available in multiple sizes and termination options to fit various designs (check datasheet for exact dimensions and termination types). Size and material notes Size, construction, and termination options vary by model. Refer to the specific variant datasheet for exact dimensions and materials. Performance and reliability Designed for fast response to overheating, with consistent operation across a wide temperature range. Onetime use ensures a decisive shutdown when the threshold is reached, minimizing downstream damage. Use scenarios 1) In a compact Liion battery pack to provide a safe shutdown during abnormal overheating during charging or load operation. 2) In a small wall adapter or DC power supply to prevent overheating under ambient temperatures or sustained current. 3) In a 3D printer or heating element assembly to stop current flow if the heat rises beyond safe levels, protecting components and reducing fire risk. Important note After activation, the fuse cannot be reset. Replacement of the fuse and inspection of the associated system are required before reuse.