Tamura/NEC SF 金屬外殼 15A 溫度保險絲

AUPO的工作原理 / 田村 / NEC SF熱熔斷器是基於材料的熱膨脹和導電特性. 當電路中的溫度升至熔斷器的額定觸發溫度時, 保險絲的金屬材質會因受熱而膨脹. 當這種擴張達到一定程度時, 會導致保險絲內部電阻急遽上升. The increase in resistance will cause the fuse to heat up rapidly, further accelerating the expansion of the metal material. When the expansion reaches a certain degree, the fuse will disconnect in the circuit, thereby protecting the circuit and equipment from damage due to overheating.

Under normal circumstances, when the current passes through the thermal fuse, the fuse will maintain a low resistance state and will not affect the circuit.

When overheating occurs in the circuit, the thermal fuse begins to work. Its metal material expands due to heat, causing the resistance inside the fuse to change.

As the resistance rises, the fuse temperature rises further, accelerating the expansion of the metal material.

When the metal material expands to a certain extent, the resistance inside the fuse will rise sharply, causing the current in the circuit to be cut off.

After the fuse is disconnected, a new fuse needs to be replaced to restore the normal operation of the circuit. This is because it is difficult for the metal material to return to its original state after expansion, so that the resistance always remains high.

2. Structural features
Thermal fuse is a temperature sensing circuit cutting device with the characteristic of one-time fusing, 那是, it only acts once at the fusing temperature and cannot be used again. Common types of thermal fuses include organic thermal fuses and alloy thermal fuses.

Taking the organic thermal fuse as an example, its structural features mainly include components such as temperature sensing block, compression spring and star spring. 當有機熱熔斷器周圍的溫度升至其工作溫度時, the temperature sensing block will melt, and the compression spring will relax to make room, so that the star spring is pushed away to contact the pin, 從而斷開當前路徑. 這樣, the circuit will be permanently cut off.

Product Features of Thermal Fuse
SEFUSE temperature fuse installation precautions:
1. 使用引線彎曲時, 它應該從一個零件彎曲超過 6 距離根毫米; 彎曲時, 不要損壞根部和引線, 並且不要拉, 按, 或用力扭轉引線.
2. 當溫度保險絲用螺絲固定時, 鉚接或接線柱, 應能防止機械蠕變及接觸不良.
3. 連接件應能在電氣產品工作範圍內可靠運作，不因振動、衝擊而產生位移.
4. 焊接引線時, 加熱濕度應限制在最低限度, 且溫度保險絲不應承受高溫; 請勿強行拉扯, 按, or twist the thermal fuses and leads; after soldering, cool down immediately for more than 30 秒.
5. 熱熔斷器只能在規定的額定電壓條件下使用, 當前和指定溫度. Pay particular attention to the maximum continuous temperature that the thermal fuse can withstand.
筆記: 標稱電流, lead length and temperature can be designed according to customer requirements.

LE series Thermal Fuse (15A)

產品特點

Using temperature fuse metal casing and sense temperature organic particles.
屬於不可恢復型溫度保險絲. 溫度保險絲熔斷, 即使周圍溫度下降, 它不會被打開.
無鉛 (鉛) 和鎘 (光碟), 並符合RoHS指令.
REACH不包含指定的 46 類別 SVHC (高度關注物質).

產品尺寸

250V 15A Temperature fuse