Обслуговування OEM/ODM для термозапобіжників SEFUSE NEC SF

How to tell if a sefuse NEC temperature fuse (Термічний запобіжник) is good or bad?
The following steps can be used to measure the quality of a temperature fuse (Термічний запобіжник) :

Use a multimeter to measure the resistance value: Set the multimeter to the resistance value measurement position, and then connect two test pens to the two ends of the Thermal Fuse . If the fuse is not blown, its resistance value should be very small. If the fuse is blown, the resistance value will be a larger number. If you are not sure about the correct resistance value, you can refer to the product manual or consult the manufacturer. ‌

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Observe the color change: If the Thermal Fuse turns black or the resistance value is abnormally high, його потрібно замінити.

The following matters need to be noted during the measurement process:
Lead bending: When bending the lead, вона повинна бути зігнута з частини більше ніж 6 мм від кореня, and the root and lead should not be damaged. Не тягніть силою, преса, or twist the lead. ‌
Welding operation: При зварюванні свинець, вологість при нагріванні повинна бути обмежена до мінімуму, and be careful not to apply high temperature to the thermal fuse. Не тягніть силою, преса, або скрутіть термозапобіжник і проведіть. Після зварювання, його слід охолоджувати більше ніж 30 секунд негайно.
Use conditions: Thermal fuses can only be used under the conditions of specified rated voltage, струм і задану температуру. Зверніть особливу увагу на максимальну тривалу температуру, яку може витримати термозапобіжник.

Additional suggestions and common problems:
Replacing fuses: When a thermal fuse burns out, it needs to be replaced with a new fuse with the same voltage and rated temperature. Usually, thermal fuses are designed to be push-pull, so you only need to gently pull out the old fuse and insert the new one.
Regular inspection: When using electrical appliances, electronic equipment, and automobiles, it is very important to regularly check whether the thermal fuse is burned out.

Thermal cut-off fuses of different brands and types:

Black Square 250V Thermal Fuse Cutoff LED Fuses

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SEFUSE NEC SF Cutoffs Thermal Fuse