SQK Cement Resistors
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SQK Cement Resistors

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%.

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Product Description

SQK Cement Resistors



 Products

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%.

Rated power

5W

7W

10W      

15W

20W~25W

Max. working voltage

350V

500V

750V

1000V

1000V

Dielectric withstanding  voltage

1000V
(AC)

1000V
(AC)

1000V
(AC)

1000V
(AC)

1000V
(AC)

Resistance Tolerance

J ± 5%

J ± 5%

J ± 5%

J ± 5%

J ± 5%

Specifications of RX L Type   RX L

Power

Type

Dimensions

L±1.5

W±1

H±1.5

p±1.5

h±1

a±0.5

b±0.1

15W

L1

50

12.5

12

35

14

2

0.8

L2

50

12.5

12

25

11

3

0.8

20W

L1

65

14

14

50

14

2

0.8

L2

65

14

14

35

11

3

0.8

Test Item

Test Condition

Performance

Short time overload 

ΔR≤±(2%R0+0.05Ω)

2.5×RCVW for 5 seconds.

 

Load Life in Humidity

JIS-C-5202 7.9

 

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.

 

Load Life 

JIS-C-5202 7.10

 

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℃.

Solderability

JIS-C-5202 6.5

95% coverage MIN

Test temperature of solder:235±5℃ 
:235±5℃ 
Dwell time in solder:3±0.5 seconds
:3±0.5 seconds

 

 

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,


Temperature

DipTime

350°C±10°C

3.0±0.5 seconds

260°C±5°C

10±1seconds

 

Nonflammability

Nonflammable

Respectively load AC voltage by 5,10,16 times rated power for 5 minutes.

Note: We can according to customer’s requirements to customize the specifications and dimensions .Pls feel free to contact us.


SQK Cement Resistors




Derating Curve of SQK Cement Resistors:


For resistors operated in ambient temperatures above 70 ℃,power rating must be derated in accordance with the curve below.


SQK Cement Resistors data




Surface Temperature Rise of SQK Cement Resistors:

 SQK Cement Resistors data





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