Cement Type Resistors SQM

Products

Cement Type Resistors SQM

Features

1.Good heat-durability, low temperature coefficient, low noise, high load power, high insulating capacity.
2.Operating ambient temperature:-55℃~+275℃ 
3.Resistance tolerance: ±1%,±2%,±5%,±10%.

Specifications

Part NO.
RX

Dimensions

Resistance range

W± 1

D± 1

H± 1.5

L± 1

P± 1

d± 0.05

KN

MO

2W

11

7

20.5

4

4

0.8

0.1~270

271~10K

3W

12

8

25

4

4

0.8

0.1~1K

1K1~50K

5W

13

10

25.5

4

4

0.8

0.1~1K

1K1~50K

7W

13

10

39

4

4

0.8

0.1~1K

1K1~47K

10W

13

10

51

4

4

0.8

0.1~1K

1K1~47K

Power rated

Item

2W

3W

5W

7W

10W

Max. working voltage

150V

350V

350V

500V

750V

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 Resistance

JIS-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 Typr 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.

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.