Cement Type Resistors SQH
  • Cement Type Resistors SQHCement Type Resistors SQH

Cement Type Resistors SQH

Cement type resistors SQH 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

Cement type resistors SQH



 Products

Cement type resistors SQH

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%.




Specifications of Cement Type Resistors SQH​: 


Rated Wattage

W+1

H+1

L±15

P

H1±1

D+05

P1±02

P2±02

A+05

B+05

C+05

G+05

Resistance Range(Ω)

Wire Wound

Power Rim

10W

10

9

48

32±1

21

5

2.5

1.7

8

5

12

3

0.5-600

601~50K

15W

12.5

11.5

48

32±1

21

5

2.5

1.7

8

5.5

12

3

1-600

601~150K

20W

14E

13.5

60

42+1

24

6

3

2.5

8

5与

12

3

1~1K

1.1K-150K

30W

19

19

75

55±2

31

7.5

.

.

10.5

8

18

1~2K

-

40W

19

19

90

67±2

31

7.5

.

.

10.5

8

18

3_5

1~2K

-

Power rated

Item

Item

10W

15W

20W

30W

40W

Max working voltage

750V

1000V

1000V

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%

 

Cement Type Resistor (wire wound)

Characteristics

Specifications

Test Method

DC ResistanceJIS-C-5202 5.1

J ± 5%

At 25℃

Dielectric withstanding voltage 
 
JIS-C-5202 5.7

No evidence of flashover mechanical amage, arcing or insulation breakdown.

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.

Insulation Resistance 

JIS-C-5202 5.6

1000MΩ     MIN

Withstanding test and shall be measured at DC 500V. Resistor shall be prepared AC same method of dielectric.

Thermal Shock

ΔR≤±(2%R0+0.1Ω)

After application of rated power for 30 minutes, 30 minutes exposure to -30±5℃ ambient temperature.

Humidity

JIS-C-5202 7.5

ΔR≤±(2%R0+0.1Ω)

Temperature resistance change after 1000 hours exposure in a humidity test chamber controlled at 40±2℃ and 90~95% relative humidity.

Cement Type Resistor (metal oxide film) 

Short time overload 

ΔR≤±(2%R0+0.05Ω)

Temperature resistance change after the application of a potential of 2.5 times RCVW for 5 seconds.

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℃.

Load Life in Humidity

JIS-C-5202 7.9

ΔR≤±(5%R0+0.1Ω)

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.

Solderability
JIS-C-5202 6.5

95% coverage MIN

Test temperature of solder:230±5℃ 
Dwell time in solder:3±0.5 seconds

Humidity

JIS-C-5202 7.5

ΔR≤±(5%R0+0.1Ω)

Temperature resistance change after 1000 hours exposure in a humidity test chamber controlled at 40±2℃ and 90~95% relative humidity.

Resistance to Soldering Heat

ΔR≤±(1%R0+0.05Ω)

Immerge into the 350±10°C tin stove by3.2~4.8
mm length as the follow form.


Temperature

Dip   Time

350°C±10°C

3.0±0.5 seconds

260°C±5°C

10±1seconds

 

Nonflammability

Nonflammable

Load 5 min according to 5times, 10 times, 16 times rated power and A.C. respectively.

Notes 

More details, please feel free to contact us. 






Derating Curve of Cement Type Resistors SQH​:


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






Surface Temperature Rise of Cement Type Resistors SQH​:

 






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