强力推荐 专业熔断保险丝电阻 功率型保险丝电阻器
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1.features产品特性
使用中若发生过载异常时发挥保险丝功能
符合安规ul-94v-o要求
coating meets ul-94v-0
符合无铅/rohs要求
lead-free and rohs compliant
characteristics
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standard
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test methods
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1. resistance temperature coefficient (ppm/℃) |
±300ppm/℃
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natural resistance change per temperature degree centigrade. (ppm/℃) r1: resistance value at reference temperature. (t1) r2: resistance value at reference temperature. (t2) t1: room temperature t2: t1±100℃ | |||||
2. dielectric withstanding voltage |
no evidence of flashover, mechanical damage or arcing or, insulation break down. | resistors shall be subjected to an approximately sinusoidal test potential (as below) 60hz applied between both terminals connected together and a 90° v-block extending beyond the end of the resistor. | |||||
resistor wattage | dc volts | ||||||
1/2w(1ws) 1w,2w above | 350 600 | ||||||
3. solderability |
90% covered min. |
the terminal lead shall be dipped into molten solder s at 3.2 to 4.8mm from the body of resistor.the temp. and time as below: a. 260±5℃for 2±0.5 seconds b. 350±10℃for 2±0.5seconds | |||||
4. resistance to soldering |
no evidence of mechanical damage △ r/r±5%
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the terminal of the resistor is dipped into the molten solder of 350±10℃for 3±0.5 seconds. then put the resistor in the room temperature. for min.3 hours.
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5. humidity load life |
±5% max./1000hours
| resistance change after 1000 hours ( 1.5 hours on 0.5 hours off)at rated continuous working voltage in a humidity chamber controlled at 40±2℃and 90~95% relative humidity . | |||||
6. load life |
±5% max./1000hours | permanent resistance change after 1000 hours operating at rated continuous working voltage with a duly cycle of 1.5 hours on 0.5 hours off at 70 ± 2℃ambient .
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7. temperature cycling |
δ r/r at±1% max.no evidence of mechanical damage. | resistance change after continuous five cycles for duty cycle as specified below.
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step | temperature | time | |||||
1 | -30℃ | 30 minutes | |||||
2 | +25℃ | 10~15 minutes | |||||
3 | +85℃ | 30 minutes | |||||
4 | +25℃ | 10~15 minutes | |||||
characteristics
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standard
| test methods | |||||
8. short time overload | δr/r at±2% max. with no evidence of arcing burning, or charring |
permanent resistance change after the application of a potential of 2.5 times rated continuous working voltage for 5 seconds at room temperature.
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9. terminal strength |
no evidence of mechanical damage or loosening terminals |
direct load resistance to 2.5kg direct load 30±5 seconds twist test, for axial leads unit only. terminal lead shall be bent through at a right angle at a point of 6.35mm from the body edge of resistor and shall be rotated through at a right angle about the original axis of the bent terminal in alternating direction for a total 3 rotations.
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本产品的加工定制是是,品牌是代禾,型号是FKNR,种类是熔断,性能是通用,材料是线绕,制作工艺是被釉线绕,外形是圆柱形,标称阻值是0.1R-100R,允许偏差是±5%,温度系数是200PPM,额定功率是1/4W-5W(W),功率特性是中功率,频率特性是高频,产品性质是热销,营销方式是
联系方式
- 地址:东莞 东莞市塘厦镇平山188工业区沿场路6号3楼
- 邮编:523713
- 电话:(0769)86 0755 33616521/18620362906
- 工程师:朱小珂
- 手机:15976878116