Plate Cement Resistors BK

Test Item

Test Condition

Performance

Temperature Coefficient

The resistance value at normal temperature and normal temperature added 100°C, calculate per °C resistance value change rate.

±300ppm/°C

Short Time overload

According 10
times rated power to account the voltage or max .overload voltage (get the lower)
for 5 seconds.

R≤±(2%+0.05Ω)

Resistance to soldering Heat

Immerge into the 350±10°C tin stove for 2~3seconds.

R≤±(1%+0.05Ω)

Solderability

Immerge into the 235±3°C tin stove for 2~3seconds.

The soldering area is over95%

Temperature cycling

At -55°C for 30 min. ,then at+25°C for 10~15°C,then at +155°C for 30 min., then at +25°C for 10~15 min., total 5cycles.

R≤±(1%+0.05Ω)

Load life in humidity

Overload rated voltage or Max. working voltage(get the lower) for 1000 hours(1.5hours on and hours off) at the 40±2°C and 90~95% relative humidity.

R≤±(5%+0.05Ω)

Load life in heat 

Overload rated voltage or Max. working voltage(get the lower) for 1000 hours(1.5hours on and hours off) at the 70±2°C.

R≤±(5%+0.05Ω)

Terminal strength

Pull :10N

R≤±(2%+0.1Ω)

Vibration

Frequency :10~55Hz. 
Swing:0.75mm.
Test tim:6hours.

R≤±(2%+0.1Ω)

Nonflammability

Respectively load AC voltage by5,10,16times rated power for 5 minutes.

No visible flame