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Resistor Metal Film Low Ohm

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Resistor 不燃性金屬膜阻值電阻器

PDF File  Data Spec Flame-proof Typ Metal Film Low Ohm Resistor - FML Series  (不然性)

Resistor INTRODUCTION

The FMF series flame-proof Carbon Film Resistors are manufactured by Coating a homogeneous film of pure carbon on high grade ceramic rods, resistance less than 10 have an electro less deposited nickel film, and are coated with layers  of gray color flame-proof lacquer. These resistors meet overload tests in accordance with UL specification  without producing a fire hazard.

DIMENSION (mm)
Power: STYLE Dimension (mm)
L D H d
1/4W FML25 6.3±0.5 2.3±0.3 29±2.0 0.55±0.03
1/2W FML50 9.0±0.5 3.2±0.5 26±2.0 0.65±0.03
1W FML100 11.5±1.0 4.5±0.5 35±2.0 0.78±0.03
2W FML200 11.5±1.0 4.5±0.5 35±2.0 0.78±0.03
1/2WS FML50S 6.3±0.5 2.3±0.3 29±2.0 0.55±0.03
1WS FML100S 9.0±0.5 3.2±0.5 26±2.0 0.65±0.03
2WS FML200S 11.5±1.0 4.5±0.5 35±2.0 0.78±0.03
ELECTRICAL CHARACTERISTICS
Style FML25 FML50 FML50S FML100 FML100S FML200 FML200S
Power Rating 70oC 1/4W 1/2W 1/2WS 1W 1WS 2W 2WS
Operating Temp. Range -55oC ~ +155oC
Max. Working Voltage 250V 350V 350V 500V 400V 500V 500V
Max. Overload Voltage 500V 700V 600V 1000V 800V 1000V 1000V
Dielectric Withstanding Voltage. 400V 500V 400V 750V 600V 750V 750V
Value Range  ±1%, ±5% 0.1Ω ~0.99Ω
Temp. Coefficient (by Type) ±50ppm, ±100ppm.
* Standard resistor is 10Ω ~ 1MΩ, below or over this resistance on request.
Mayloon characteristic parameters of electronic product specification changes or updates without prior notice

 

 
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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。