5A 250V Thermal Cutoff Fuse with 102°C to 150°C Temperature Range for Overheat Protection
This radial lead thermal cutoff fuse provides reliable overheat protection for electrical equipment. With ratings of 5A 250V and multiple temperature options (102°C, 115°C, 125°C, 130°C, 150°C), it serves as a critical safety component in preventing electrical fires and equipment damage.
When equipment temperature rises abnormally, the thermal fuse detects the heat. At the set temperature threshold, the low-melting-point alloy liquefies and contracts into a spherical shape under special resin surface tension, permanently cutting off the electrical circuit.
| Component | Description |
|---|---|
| Insulation Case | Protective outer housing |
| Low melting point alloy | Temperature-sensitive fusible element |
| Special resin | Enables alloy contraction |
| Seal resin | Environmental protection |
| Tinned plated copper | Electrical connection leads |
- Maintain 3mm minimum distance from fuse body when bending wires
- Minimize soldering time and maximize distance during installation
- Monitor current flow through fuse body
- Avoid exposure to corrosive liquids or gases
- Never connect heater directly to fuse
| Parameter | Dimension (mm) |
|---|---|
| A | 8.5±0.5 |
| B | 8.0±0.2 |
| C | 3.5±0.2 |
| D | 1.0±0.05 |
| E※ | 45±2 |
Custom lengths available upon request.
| P/N | Rated Temp Tf(℃) | Actual Temp (℃) | Hold Temp Tc(℃) | Limit Temp Tm(℃) | Rated Voltage (V) | Rated Current (A) |
|---|---|---|---|---|---|---|
| Y10 | 102 | 98±1 | 72 | 150 | 250 | 10 |
| Y20 | 115 | 111±2 | 87 | 150 | 250 | 10 |
| Y30 | 125 | 121±2 | 95 | 150 | 250 | 10 |
| Y35 | 130 | 126±1 | 102 | 150 | 250 | 10 |
| Y50 | 150 | 146±2 | 120 | 180 | 250 | 10 |
Our thermal fuses are manufactured with comprehensive quality assurance and hold multiple international certifications including CCC, VDE, TUV, UL, and SGS. Our production facility is ISO9000 certified, ensuring consistent quality and reliability.
Thermal fuses open circuits specifically in response to overheating conditions, while electric fuses respond to overcurrent. Thermal fuses are non-resettable and must be replaced after activation.
Use a multimeter to check for continuity. If the fuse shows continuity (low resistance), it's functional. An open circuit indicates a blown fuse requiring replacement.
Thermal fuses activate due to component failure, wiring issues, excessive loads, or blocked ventilation causing abnormal temperature rise.
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