SQK Cement Resistors Features: 1. Small dimension, excellent stability in high temperature,resistant to humidity and shock. 2. Completely insulated character suitable for printed circuit board. 3. Super heat dissipation small linear temperature coefficient. 4. Instant overload capability low noise figures and low annual shift on resistance values. 5.Operating ambient temperature:-55℃~+275℃ 6.Resistance tolerance: ±1%,±2%,±5%,±10%.
SQK Cement Resistors
Products |
SQK Cement Resistors |
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Features |
1. Small dimension, excellent stability in high temperature,resistant to humidity and shock. 2. Completely insulated character suitable for printed circuit board. 3. Super heat dissipation small linear temperature coefficient. 4. Instant overload capability low noise figures and low annual shift on resistance values.
5.Operating ambient temperature:-55℃~+275℃ |
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Rated power |
5W |
7W |
10W |
15W |
20W~25W |
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Max. working voltage |
350V |
500V |
750V |
1000V |
1000V |
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Dielectric withstanding voltage |
1000V |
1000V |
1000V |
1000V |
1000V |
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Resistance Tolerance |
J ± 5% |
J ± 5% |
J ± 5% |
J ± 5% |
J ± 5% |
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Specifications of RX L Type RX L |
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Power |
Type |
Dimensions |
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L±1.5 |
W±1 |
H±1.5 |
p±1.5 |
h±1 |
a±0.5 |
b±0.1 |
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15W |
L1 |
50 |
12.5 |
12 |
35 |
14 |
2 |
0.8 |
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L2 |
50 |
12.5 |
12 |
25 |
11 |
3 |
0.8 |
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20W |
L1 |
65 |
14 |
14 |
50 |
14 |
2 |
0.8 |
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L2 |
65 |
14 |
14 |
35 |
11 |
3 |
0.8 |
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Test Item |
Test Condition |
Performance |
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Short time overload |
ΔR≤±(2%R0+0.05Ω) |
2.5×RCVW for 5 seconds. |
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Load Life in Humidity |
ΔR≤±(5%R0+0.05Ω) |
Temperature resistance change after 1000 hours(1.5hours on and 0.5 hours off) at RCVW in a humidity chamber controlled at 40±2℃ and 90~95% relative humidity. |
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Load Life |
ΔR≤±(5%R0+0.1Ω) |
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℃. |
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Solderability |
95% coverage MIN |
Test temperature of solder:235±5℃ |
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Resistance to Soldering Heat |
ΔR≤±(1%R0+0.05Ω) |
Immerge into the 350±10°C tin stove by3.2~4.8mm length as the follow form. 3.2mm~4.8mm,
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Nonflammability |
Nonflammable |
Respectively load AC voltage by 5,10,16 times rated power for 5 minutes. |
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Note: We can according to customer’s requirements to customize the specifications and dimensions .Pls feel free to contact us. |
Derating Curve:
For resistors operated in ambient temperatures above 70 ℃,power rating must be derated in accordance with the curve below.
Surface Temperature Rise: