High Energy Power Cement Wire Wound Resistor

Description

Performance Requirements

Test Method

Resistance Temperature

Coefficient

 T.C.R. ≤350ppm/℃

 Test temperature

+20℃/-55℃/+20℃/+125℃/+20℃

Short-time Overload

  R≤±(1%R±0.05R)

No visible damage,Markings legible

2.5 times rated voltage or maximum overload voltage (the lower) 5 seconds

Wiith Standing Voltage

 No flasheover or breakdown

AC 700V         1 minute

Terminal Strength

Pulled

R≤±(1%R+0.05R)

No visible damage

Φd  0.68mm;Load 20N  10s

Winded

Φd  0.68mm;Load 20N   90⁰

Twisted

360⁰  in opposite direction

Resistance to Vibration

R≤±(1%+0.05R)

No visible damage

3 direction 2 hours each

Solder-heat Resistance

R≤±(1%R+0.05R)

Marks legible ,no visible damage

350℃ 2mm from the body,3 seconds

Solderability

At least 95% of the dipping surface must be covered by new solder, no flaws gathered.

235℃ 

2mm from the body, 2 seconds

Temperature Cycle

R≤±(1%R+0.05R)

No visible damage

-25/+155℃ 

for 5 cycles

Humidity

R≤±(5%R+0.05R)

No visible damage

40℃  95%RH  

1344 hours

70℃

Load Life

R≤±(5%R+0.1R)

No visible damage, marks legible

rated voltage or maximum voltage,1.5 hours on, 0.5 hours off, 70 centigrade temperature 1000 hours