高精密金属膜电阻器
PMF(1/4W)
HIGH PRECISION METAL FILM RESISTOR
STANDARD TYPE PMF(1/4W)
品名（PART NUMBER）
依据其种类，分别注明额定功率、容许差率、公称电阻值和形状。
ACCORDING TO THE TYPES OF RESISTORS, THE POWER RATED, RESISTANCE TOLERANCE, RESISTANCE VALUE, SHAPES.
例(e.g)：
PMF 1/4W B(±0.1%) 140K T
种类TYPE 额定功率RATED POWER 容许差TOLERANCE 公称值RESISTANCE 形状FORMING
电力特性(POWER CHARACTERISTIC)
额定功率 POWER 项目 RATED ITEM | 1/4W | |
使用电压 MAX WORKING VOLTAGE |
P.R或250V取较小者 P.R Or 250V Get the lower voltage） | |
过负荷电压 MAX OVERLOAD VOLTAGE |
2.5X P.R或500V取较小者 2.5X P.R Or 500V（Get the lower voltage） | |
断续过负荷 MAX INTERMITTENCE OVER LOAD VOLTAGE |
4X P.R或750V取较小者 4X P.R Or 750V（Get the lower voltage） | |
耐电压 DIELECTRIC WITHSTANDING VOLTAGE | 500V (AC) | |
阻抗误差值 RESISTANCE TOLERANCE | B±0.1% | |
阻抗值范围 RESISTANCE RANGE（Ω） | MIN | 10R |
MAX | 470K | |
项目 CHARACTERISTICS | 规格值 SPECIFICATIONS | 测试方法 TEST METHODS JIS 5202 |
温度系数 TEMPERATURE COEFFICIENT | ±100PPM/℃ | 5.2 |
短时间过负荷 SHORT TIME OVERLOAD | △R≤±(0.5%R0+0.05Ω) | 5.5 条件A |
断续过负荷 PULSE OVERLOAD | △R≤±(1%R0+0.05Ω) | 5.8 |
焊接耐热性 RESISTANCE TO SOLDERING HEAT | △R≤±(0.5%R0+0.05Ω) | 6.4 |
温度循环 TEMPERATURE CYCLING | △R≤±(0.5%R0+0.05Ω) | 7.4 |
耐湿负荷寿命LOAD LIFE IN HUMIDITY | △R≤±(2%R0+0.1Ω) | 7.9 |
耐温负荷寿命 LOAD LIFE | △R≤±(2%R0+0.1Ω) | 7.10 |
特性项目 CHARACTERISTICS | 规格值 SPECIFICATIONS | 测试方法 TEST METHODS |
直流阻抗值 DC RESISTANCE JIS-C-5202 5.1
|
B±0.1%
| 室温25℃ AT 25℃ |
温度特性 TEMPERATURE COEFFICIENT JIS-C-5202 5.2 |
±100PPM/℃ (5R以下不作要求) | R2-R1 R1(T2-T1) R1:常温(T1)阻抗值 RESISTANCE VALUE AT ROOM TEMPERATURE(T1) R2:常温+100℃(T2)阻抗值 RESISTANCE VALUE AT ROOM TEMPERATURE +100℃(T2) |
耐电压 DIELECTRIC WITHSTANDING VOLTAGE JIS-C-5202 5.7 | 涂装不可烧损,绝缘不可破坏 NO EVIDENCE OF FLASHOVER MECHANICAL DAMAGE,ARCING OR INSULATION BREAKDOWN. | 电阻两端导线置于金属V型槽上依特性表之电压规定印加60秒 PUT THE RESISTORS TWO SIDE LEAD WIRE ON THE METAL V-TROUGH LOAD THE VOLTAGE,WHICH IS ACCORDING THE CHARACTERISTICS TABLE FOR 60S
|
温度循环 TEMPERATURE CYCLING JIS-C-5202 7.4
|
△R≤±(0.5%R0+0.05Ω)
| 依下表所规定之温度连续5次 FIVE TIMES ON THE TEMPERATURE AS THE TABLE. 步骤 温度 放置时间 STEP TEMPERATURE TIME(MIN) 1 -55℃±3℃ 30 2 ROOM TEMP 10-15 3 155℃±2℃ 30 4 ROOM TEMP 10-15 |
