老化水泥电阻器 高品质环保精密水泥电阻器
********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
1.features产品特性
体积小,耐震耐湿性以及散热性非常好。
small diamension,excellent stability in high temperature , resistant to humidity and shock.
绝缘性好,使用于电路板上绝缘性较好。
excellent imsulation being used in pcb.
耐电压,低杂音,耐热,阻值无变化
resistance to instant overload , low noise figure, resistance to heat and low shift on values.
使用金属氧化膜瓷芯代替绕线可制作高阻值电阻
metal oxide file cutting core can offer high range resistance.
符合无铅/rohs要求
lead-free and rohs compliant
2.power derationg curve & temp.rise curve
3.performance specifications
characteristics |
standard |
test methods | |||
1. temperature coefficient of resistors (ppm/℃) |
wire wound –80~+900
| natural resistance change per temperature degree centigrade. (ppm/℃) r1: resistance value at reference temp. (t1) r2: resistance value at reference temp. (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 | ac or rms volts | ||||
1w above | 500 | ||||
3. solderability |
90% covered min. | the terminal lead shall be dipped into molten solder s at 3.2 to 4.8mm fromthe body of resistor.the temp. and time as below: a. 235±5℃for 2±0.5seconds b. 270±10℃for2±0.5seconds | |||
4. resistance to soldering |
no evidence of mechanical damage ?r / r at±2% max |
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 3 min.hours. | |||
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 duty cycle of 1.5 hours on 0.5 hours off at 70 ±2℃ambient | |||
7. temperature cycling |
±2% max with no evidenceofmechanical damage |
resistance change after continuous 5 cycles for duty cycle as specified below. | |||
step | temperature | time | |||
1 | -30℃ | 30 minutes | |||
2 | +25℃ | 10~15 minutes | |||
3 | +85℃ | 30 minutes | |||
4 | +25℃ | 10~15 minutes | |||
characteristics |
standard |
test methods |
8. short time overload |
?r / r at±3% 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. |
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 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 of 3 rotations. |
10. burn out |
the arcing and or flaming duration is less than 2seconds and the flame height is less than 1/2 inch. |
resistors burning out or opening up for overloads in excess of 10 times rated wattage (regardless of how it is applied) |
本产品的加工定制是是,品牌是代禾,型号是S,种类是水泥,性能是高温,材料是线绕,制作工艺是被釉线绕,外形是长方体,标称阻值是0.001R-500K,允许偏差是±5%,温度系数是300PPM,额定功率是1-100W(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