Metal Plate Non-inductive Cement Resistor MPR

Characteristics

Specifications

Test Methods

DC Resistance JIS-C-5202 5.1

J±5%

 K±10%

AT 25°C

Temperature Coefficient

JIS-C-5202 5.2

±350PPM/°C

 x106(PPM/°C)

1.Resistance value at room temperature(T1 )

2.Resistance value at room temperature+100°C (T2)

Dielectric Withstanding Voltage JIS-C-5202 5.7

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

Resistors shall be clanped in the trough of a 900 metallic v-block and shall be test at specified in the above list for 60 seconds.

Insulation Resistance 

JIS-C-5202 5.6

1000MΩ MIN

Withstanding test and shall be measured dc 500v. Resistor shall be prepared same method of dielectric

Short Time Overload

△ R≤±(2%Ro+0.05Ω)

1.1w-3w power rated x 5 times, 5sec

2.5w-20w power rated x 10 times, 5sec

Load Life In Humidity JIS-C-5202 7.9

△ R≤±(3%Ro+0.05Ω)

Resistance change after 1000 hours (1.5 hrs on, 0.5 hrs off ) at rcwv in a humidity chamber controlled at 40°C ± 2°C and 90-95% relative humidity.

Load Life 

JIS-C-5202 7.10

△ R≤±(3%Ro+0 05Ω)

Permanent res stance change after 1000 hours operating at rcwv, wigh duty cycle of 1.5 hours on, 0.5 hours off at room temperature.

Thermal Shock
JIS-C-5202 7.4

△ R≤±(2%Ro+0 05Ω)

The temperature set in the following table is 5 consecutive times.

Step

Temperature

Time(min)

1

-55°C

30sec

2

25°C

5sec

3

85°C

30sec

4

25°C

5sec