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Products
产品
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Cement type resistors (SQM)
水泥型电阻器 SQM型
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Features
特点
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1.Good heat-durability, low temperature coefficient,
low noise,high load power, high insulating capacity.
耐热性好、温度系数小、噪声低、负荷功率大、绝缘性高。
2.Operating ambient temperature 使用环境温度 :-55℃~+275℃
3.Resistance tolerance阻值误差: ±1%,±2%,±5%,±10%.
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Power rated
额定功率
Item项目
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2W
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3W
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5W
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7W
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10W
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Max. working voltage
最大工作电压
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150V
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350V
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350V
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500V
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750V
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Dielectric withstanding voltage
耐电压
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1000V
(AC)
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1000V
(AC)
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1000V
(AC)
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1000V
(AC)
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1000V
(AC)
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Resistance tolerance
阻值精度
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J ± 5%
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J ± 5%
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J ± 5%
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J ± 5%
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J ± 5%
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Cement Type Resistor (wire wound)
水泥电阻器（绕线）
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Characteristics
特性
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Specifications 规格
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Test Method 测试方法
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DC Resistance
直流阻抗值
JIS-C-5202 5.1
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J ± 5%
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AT 25℃ 温度为25°C时
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Dielectric withstanding voltage
耐电压
JIS-C-5202 5.7
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No evidence of flashover
mechanical amage, arcing
or insulation breakdown.
涂装不可烧毁，绝缘不可破坏
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Resistance shall be clamped with a
conductive material which conforms
to resistors surface so that 90o
of the outer periphery is contacted
a potential of 1000V AC shall be
applied for 60 seconds.
电阻两端导线置于金属V型槽上依电性表之
电压规格印加60秒。
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Insulation Resistance
绝缘阻抗
JIS-C-5202 5.6
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1000MΩ MIN
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Withstanding test and shall be measured
at DC 500V. Resistor shall be prepared
AC same method
of dielectric.
以DC500V测试待测体于V形槽之上导线及其表面涂装印加60秒。
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Thermal Shock
热冲击
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ΔR≤±(2%R0+0.1Ω)
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After application of rated power for 30
minutes,30 minutes exposure to -30±5℃ ambient temperature.额定电压印加
30分钟后，于8到12秒以内置于30°C中30钟。
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Humidity
耐湿性
JIS-C-5202 7.5
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ΔR≤±(2%R0+0.1Ω)
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Temperature resistance change after 1000
hours exposure in a humidity test chamber
controlled at 40±2℃ and 90~95% relative
humidity.在温度为40±2°C，相对湿度为90~95%时置于恒温箱中不加电压，连续放置
1000小时。
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Cement Typr Resistor (metal oxide film)
水泥电阻特性（金属氧化皮膜）
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Short time overload
短时间过负荷
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ΔR≤±(2%R0+0.05Ω)
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Temperature resistance change after the
application of a potential of 2.5 times
RCVW for 5 seconds.
2.5倍额定电压测试5秒。
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Load Life
室温寿命
JIS-C-5202 7.10
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ΔR≤±(5%R0+0.1Ω)
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Permanent resistance change after 1000
hours operating at RCWV, with duty cycle
of 1.5 hours on and 0.5 hours off at 25℃±2℃.在温度为25℃±2℃下以额定电压测试1000小时，其中以通电1.5小时，断电0.5小时进行。
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Load Life in Humidity
湿度寿命
JIS-C-5202 7.9
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ΔR≤±(5%R0+0.1Ω)
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Temperature resistance change after 100
hours(1.5hours on and 0.5 hours off) at RCVW
in a humidity chamber controlled at 40
±2℃ and 90~95% relative humidity.
在温度为25℃±2℃，相对湿度为90~95%时下以额定电压测试1000小时，其中以通电1.5小时，断电0.5小时进行。
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Solderability
JIS-C-5202 6.5
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95% coverage MIN
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Test temperature of solder:230±5℃
锡炉温度：230±5℃
Dwell time in solder:3±0.5 seconds
浸炉时间：3±0.5 seconds
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Humidity
耐湿性
JIS-C-5202 7.5
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ΔR≤±(5%R0+0.1Ω)
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Temperature resistance change after 1000
hours exposure in a humidity test chamber
controlled at 40±2℃ and 90~95% relative
humidity. 在温度为40±2°C，相对湿度为90~95%时置于恒温箱中不加电压，连续放置1000小时。
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Resistance to Soldering Heat
耐热性
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ΔR≤±(1%R0+0.05Ω)
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Temperature温度
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Dip Time浸入时间
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350°C±10°C
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3.0±0.5 seconds
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260°C±5°C
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10±1seconds
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Immerge into the 350±10°C tin stove by3.2~4.8
mm length as the follow form. 浸入锡炉中3.2mm~4.8mm，如下表规定所示：
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Nonflammability
不燃性
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Nonflammable 不可燃烧
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Load 5 min according to 5times, 10 times,
16 times rated power and A.C. respectively.
分别施以5,10，16倍额定功率加交流负荷5分钟。
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Notes 备注
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More details, please feel free to contact us.
更多细节，请联系我们:0755-88822893
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