1. 適用範圍 Specification
1-1 本承認書僅適用本公司生產之各種精密金屬皮膜電阻器 ( 1/8W、1/6W、1/4W、1/2W、1W、2W、3W、
5W)及其小型化之成品規格。
The specification is only suitable for Precision Metal Film Fixd Resistors (1/8W、1/6W、
1/4W、1/2W、1W、2W、3W、5W)and there are small size manufactured by
SHI MENG ELECTRONIC CO.,LTD.
1-2 參考標準 Applicable specification
本承認書參考《JIS C5201-2011》和《GB/T 5729-2003/IEC 60115-1:2001》
The specification Applicable specification《JIS C5201-2011》and《GB/T 5729-2003/IEC
60115-1:2001》
1-3 產品符合 RoHS 及 REACH 法規的最新環保要求。
Products meet the latest environmental requirements of RoHS and REACH regulations.
2. 特性
Feature
2-1 高精密、高穩定、高可靠性. High-accuracy, high steady, high dependability
2-2 噪音½，電壓係數小.
Low noise & voltage coefficient
Great economy ±5½±100PPM/°C
2-3 溫度係數½,±5½±100PPM/°C.
2-4 精密的誤差從±0.1%½±1%. Very tight tolerance from ±0.1%½±1%
3. 品名 Part Number
依據其種類，分別注明額定功率、容許差、公稱電阻值和½狀。如果產品有溫度係數要求，請在訂單上
特別注明
According the Resistors type, To mark the Rated power, Tolerance, Resistance value, and forming
type. If the product has a temperature coefficient of the requirements specified in the order.
例(e.g)：
MF
種類
Type
1/2W
額定功率
Rated power
B(±0.1%)
容許差
Tolerance
100Ω
阻值
Resistance
T52
½狀
Forming
4. 結構圖 Construction
①
鍍錫銅導線
③
鍍錫鐵½
⑤
色環標示
Tinned copper lead wire
High heat exchanged ceramic base
High stability Electric conduction film
Epoxy resin coating
Tin-plated steel caps
Color ring Mark
②
高熱傳導瓷棒
④
高穩定性導電膜
⑥
環氧樹脂塗料
注：正常為藍色環氧樹脂漆，可特殊提供灰色或磚紅色不燃性面漆；5W 產品因為功率大，表面溫升高，建議½用不燃性面漆。
5. 術語 Glossary
5-1.標稱阻值：電阻器的設計電阻值，通常標注在電阻器上。
Rated resistance：Designed resistance value usually indicated on the resistor。
5-2.額定環境溫度: 電阻器在額定功率下可持續工½的最高環境溫度。請注意如果電阻器安裝在設備內部，那麼此
處所謂的環境溫度並非設備周圍的溫度，而是設備內部、電阻器周圍的溫度。
Rated Ambient Temperature：Maximum ambient temperature at which the power rating may be applied
continuously. The rated ambient temperature refers to the temperature around the resistor mounted
inside the equipment, not to the air temperature outside the equipment。
5-3.額定功率：在 70℃環境溫度下進行耐久性試驗，而且阻值變化不超過該試驗的允許值時所允許的最大功率。
Rated power：At
70 ℃ ambient temperature durability test, and the change in resistance does not
exceed the value of the test allows the maximum power allowed。
5-4.降功率曲線：額定功率系適應在周圍溫度 70℃可以連續負載的最大功率,½額定環境溫度如超過 70℃時之額定
電力則依圖的降功率曲線實½。
Rated power is maximum power which can be continuously loaded at specified ambient temperature 70
℃, however when Rated Ambient Temperature exceeds 70℃,rated power should be determined form the
derating curve。
5-5.額定電壓：額定環境溫度或端子部溫度下可連續½加的最大直流電壓或交流電壓（商用頻率實效值），用額
定功率和公稱電阻值，按以下公式計算。½額定電壓不可超過最大工½電壓。
Rated Voltage：Maximum allowable D.C. or A.C. voltage(rms), capable to be continuously applied to
a resistor or a resistor element under the rated ambient temperature or terminal part temperature.
It shall be calculated from the rated power and nominal resistance using the following formula.
The rated voltage shall not exceed the max. working voltage。
U：電壓
I：電流
P：功率
R：阻值
5-6. 臨界阻值：在不超過最高½用電壓的情況下可½加額定功率的最大公稱電阻值。在臨界電阻值下，額定電壓
等於最大工½電壓。
Critical Resistance：The maximum nominal resistance value at which the rated power can be applied
without exceeding the maximum working voltage. The rated voltage is equal to the max. working voltage
at the critical resistance value。
5-7.最高½用電壓：電阻器或電阻元件上可連續½加的最大直流電壓或交流電壓（商用頻率實效值）。½在臨界電
阻值以下，可以½加的最大電壓為額定電壓。
Maximum Working Voltage：Maximum D.C. or A.C. voltage(rms) that can be continuously applied to the
terminations of a resistor. However, the maximum value of the applicable voltage is the rated voltage
at the critical resistance value or lower。
5-8.過負荷電壓：在短時間過載試驗中可連續½加5秒鐘的電壓，一般為額定電壓的2.5倍，½不可超過最大過載電壓。
Allowable voltage：which is applied in 5 sec. under short time overload test. Overload voltage shall
be 2.5 times of rated voltage or max. overload voltage, whichever is lower。
6.
尺寸 Dimension
Unit: mm
Size
Type
1/6W 1/8W 1/4WS 1/2WSS
1/4W 1/2WS 1WSS
1/2W 1WS 2WSS
1W 2WS
2W 3WS
3W 5WS
5W
L±1
3.5
*
6.5
*
9.2
11
15
18
25
D±1
1.7
*
2.4
*
3.3
4.5
5.0
6.0
8.0
H±3
27
27
26
28
32
33
38
d±0.06
0.45
0.50
0.60
0.70
0.78
0.78
0.78
Resistance
range
0Ω
&
0.1Ω~10MΩ
0Ω
&
0.1Ω~10MΩ
0Ω
&
0.1Ω~10MΩ
0.1Ω~2MΩ
0.1Ω~2MΩ
0.1Ω~2MΩ
0.1Ω~2MΩ
T.C.R
Tolerance
±15PPM
±25PPM
±50PPM
±100PPM
B: ±0.1%
C: ±0.25%
D: ±0.5%
F: ±1%
G: ±2%
注：①0Ω阻值範圍為≦50mΩ；
②“*＂
means“±0.5＂；
③特殊要求如面漆不燃性，色碼耐溶劑清洗等，請訂購時務必向我司提出，可按客戶要求½½。
④為滿足產品立式½用，引線根部腳漆長度≦1.5mm
，臥式½用品不考量此參數；
7.
色碼 Explanation of color
顏色
Color
Black 黑
Brawn 棕
Red 紅
Orange 橙
Yellow 黃
Green ½
Blue 藍
Violet 紫
Gray 灰
White ½
Gold 金
Silver 銀
第一½數
1ND band
0
1
2
3
4
5
6
7
8
9
第二½數
2ND band
0
1
2
3
4
5
6
7
8
9
第三½數
3ND band
0
1
2
3
4
5
6
7
8
9
倍數
Multiple
10
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
-1
10
-2
容許差%
Tolerance
F(±1%)
G(±2%)
D(±0.5%)
C(±0.25%)
B(±0.1%)
注 : 0Ω用一道黑色表示 Notice: 0Ω mark with one Black color
8. 電氣特性 Characteristics
Item
額定功率
Rated power
最高½用電壓
Max continuous working voltage
最高過負荷電壓
Max overload voltage
耐絕緣電壓
Insulation resistance
voltage
½用溫度範圍
Operating temp range
Note:額定電壓
當計算得出的額定電壓大於最高½用電壓，½用時取兩者較小者
When the calculated rated voltage greater than the maximum operating voltage, whichever is the lesser of use
Size
1/8W
1/6W
1/4WS 1/2WSS
200V
400V
300V
1/4W
1/2WS 1WSS
250V
500V
350V
1/2W
1WS 2WSS
350V
700V
500V
1W
2WS
500V
1000V
500V
2W
3WS
500V
1000V
500V
3W 5W
5WS
500V
1000V
700V
-55℃ ~ +125℃
9. 性½ Performance
特性項
Characteristics
正常品
規格值
Specifications
≧1Ω：±100PPM/℃
溫度係數參考值
±200PPM/℃
±100PPM/℃
±50PPM/℃
±100PPM/℃
測試方法
Test methods
以下阻值段為參考數據:
阻值範圍
< 1Ω
1Ω½10Ω
溫度係數
T.C.R
10.1Ω½100KΩ
≧100KΩ
注:
≧10Ω可依客戶要求生產±50PPM/℃、±25PPM/℃、±15PPM/℃;
< 1Ω電阻本身的溫度係數是在±100PPM,½因為銅線的阻值占
½阻值的比例較大,而銅線溫度係數很大,導致½電阻阻值越小
溫度係數相對越大.
R2-R1
*10
6
(PPM)/ ℃
R1*(T2-T1)
R1:常溫(T1)阻抗值.
Resistance value at room temperature (T1).
R2:常溫+100℃(T2)阻抗值.
Resistance value at room temperature+100℃.
溫度½½
Load life
溫度 70±2℃,恆溫箱中,加額定電壓或最高½用電
壓
（取小者）
,測試 1.5 小時停止 0.5 小時,連續 1000
阻抗值變化±(2%R+0.05Ω).機械特性不可有損傷. 小時.
Resistance change after 1000hrs operating at
Resistance change rate±(2%R+0.05Ω) MAX
rated voltage or
Max continuous working voltage
With no evidence of mechanical damage.
(Whichever is the less.)with duty cycle of
1.5hrs ON 0.5hrs OFF at 70℃±2℃.
額定電壓*2.5 倍或最高過負荷電壓（取小者）,測
試5秒
2.5 times the rated voltage or maximum overload
voltage (whichever is less), testing 5 seconds
將待測物½於 V 型½
V-block
短時間過負荷
Short time
over load
絕緣阻抗
Insulation
resistance
±(0.5%R+0.05Ω)
1000MΩ以上
1000MΩ or more
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