TPEL TH77 HOL Thermal Fuse 77°C – 250 V / 10 A, One-Shot Cutoff & 5-Pack
The TPEL TH77 HOL thermal fuse (77°C, 250V, 10A) is a one-shot overtemperature protection component, sold in a pack of 5, for transformers, fans, motors, chargers, and heating systems.Read the full description
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Description
Description
TPEL thermal fuses in the TH77 HOL series permanently open the circuit when the temperature reaches 77°C, providing irreversible overtemperature protection. Sold in packs of 5, they are suitable for transformers, ventilation systems, electric fans, low-power motors, chargers, electronic ballasts, capacitors, and various heating systems.
The HOL (hollow lead) form factor is compatible with PCB through-hole mounting and direct in-line wiring. The 77°C trip point and 55°C holding temperature are suited to equipment that runs noticeably warm under normal load before reaching a fault condition.
Key Features
- Rated functioning temperature (TF): 77°C — opens permanently at this temperature
- Fusing-off temperature: 73°C ±2°C
- Holding temperature (TC): 55°C — safe continuous operating temperature
- Maximum temperature limit: 120°C
- Rated voltage: 250V AC
- Rated current: 10A
Product Benefits
- 77°C trip point suits equipment that routinely operates in the 55–73°C range without triggering
- Non-resettable action provides a permanent, tamper-proof open-circuit record of the fault event
- 10A current rating handles most low-power motor, charger, and ballast applications
- Compact HOL construction integrates into existing PCB and wiring harness designs
- Pack of 5 supports both single-unit replacement and batch maintenance requirements
Technical Specifications
- Model: TH77 HOL
- Brand: TPEL
- Rated Functioning Temperature (TF): 77°C
- Fusing-off Temperature: 73°C ±2°C
- Holding Temperature (TC): 55°C
- Maximum Temperature Limit: 120°C
- Rated Voltage: 250V AC
- Rated Current: 10A
- Pack Quantity: 5 pcs
Why You'll Love It
- High 55°C holding temperature prevents false trips in equipment that runs warm under normal conditions
- 250V/10A rating is widely compatible with low-power appliance protection circuits
- HOL lead format slots into standard PCB layouts without additional adapters
- Package includes 5x TPEL Thermal Fuse 250V 10A 77°C-TH77 HOL
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