Test Item

Test Condition

Performance

Temperature coefficient

Test the resistance value at normal temperature and normal temperature added 100 degrees centigrade, calculate per degree centigrade value change rate

 5 ppm-50ppm

Short time overload

2.5 x rated voltage or Max. overload voltage(get the lower) for 5 second

 R ≤ ± (0.5%R0+0.05Ω)

Pulse overload

At 4 x rated voltage or Max. pulse overload voltage (get the Lower) cycle 10000±200times (1secondon, 25seconds off)

R ≤ ± (1%R0+0.05Ω)

Resistance to soldering heat

Immerge into the 350±10 degrees centigrade tin stove for 2-3 seconds

R ≤ ± (0.5%R0+0.05Ω)

Solder ability

Immerge into the 245±3 degrees centigrade tin stove for 2-3 seconds

The soldering area is over 95%

Temperature cycling

At -55 degrees centigrade for 30 min, then at +25 degrees centigrade for 10-15min, then at +125 degrees centigrade for 30 min, then at +25 degrees centigrade for 10-15 min., total 5cycles.

R ≤ ± (0.5%R0+0.05Ω)

Load life in humidity

Overload rated voltage or Max. working voltage(get the lower) for 1000 hours(1.5 hours on and half-hour off) at the 40±2 degrees centigrade and 90-95% relative humidity.

R ≤ ± (2%R0+0.05Ω)

Load life in heat

Overload rated voltage or Max. working voltage (get the lower) for 1000 hours(1.5 hours on and half-hour off ) at the 70±2 degrees centigrade.

R ≤ ± (2%R0+0.05Ω)