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Cement Resistor - Series

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更多 水泥電阻系列 水泥電阻

Hone CM Cement Resistor - Series

FEATURE

  • Exceptionally small and sturdy, mechanically safe, Excellent electrical characteristic
  • The materials used and the construction techniques ensure excellent flame resistance, arc resistance and moisture resistance as well as self-extinguishing capabilities, They will withstand the most rigorous loading test.
  • As resistors in radio and television receiver, The hazardous conditions of smoking and reheat can be completely prevented by the proper choice of power resistors.
  • Tolerance of ±5% and ±10% are standard.
  • Non-inductive type are available on request.
  • Heat and flame resistance
  • For high resistance value, The winding core will be replaced by metal oxide film core (RS Type)
  • Applicable specifications: EIA RS-344 and EIA RC-649
  • Power Rated: 3W ~ 1KW

 

 

 
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Newsflash

LED 極性

LED 驅動芯片 LED 極性

 

LED 極性

圖: LED 極性

由於LED工作於直流電,連接線路時必須確保極性方向正確才能正常工作。與二極管一樣,LED的接腳分正極(陽極、+)及負極(陰極、-),電流必需由正極流向負極,LED才能發光。

LED接腳的極性一般可以由其封裝上看出,但不同封裝其標示方式也不同。除封裝外,也有其他途徑得知LED的極性,以下列出常見的標示方法:

可以由以下方法找出:用萬用錶測試。模擬式萬用錶可以用電阻擋測試(注意模擬式萬用錶測試針的正負極是倒轉的的);數字式萬用錶大多有測試二極管的功能,但兩者能測的最高偏壓都有限制,模擬式萬用錶受內部電池所限,數字式萬用錶則因廠方設計而異。低壓恆流源也是理想的測試工具。例如用固定電壓電源串連一個電阻。