Varistors Voltage

The voltage between two terminals with the specified measuring current 1mA DC applied is called V1mA,The measurement shall be made as fast as possible to avoid heat affection.

The usual tolerance on varistors voltage is±10%.

The current passing through the varistors at the  maximum continuous DC voltage.

≤20μA

The peak voltage at class current (Standing surge current waveform is 8/20μS).  The class current is a peak value of current which is 1/10 of the maximum peak current for 100 impulses at per minute for 8/20μS.

See specification tables

The maximum energy within the varistors voltage change of ±10% when one impulse of  2ms or 10/1000μS is applied.
For the 2mS waveform：

J=2000_*Ip_* Vc_*10^-6

For the 10/1000μS  waveform：

J=1391_*Ip_* Vc_*10^-6              

Where  J -- Energy absorbed in joules.
         Ip -- Maximum let-through current in amps.
         Vc-- Measured clamping voltage in volts.

ΔV1mA /V1mA≤±10%.

Maximum  Peak current

The maximum current within the varistors voltage change of ±10% with the standard impulse current (8/20μS) applied one time.

ΔV1mA /V1mA≤±10%.

Varistors voltage Temperature Coefficient

≤-0.05 %/℃.

Typical value measured at 1Vrms and test frequency of 1kHz

See specification tables.

After dipping the terminals to a depth of immersion 3.5-0.5 mm from the body in a soldering bath temperature 235℃±5℃ for 2± 0.5seconds, the terminal shall be visually examined.

Approximately 95% of the terminals shall be covered with solder uniformly.

Resistance to soldering heat

After each lead shall be dipped into a solder bath having a temperature 260℃±5℃,to a point 2.0 to 2.5mm from the body of the unit. Using shielding. Board(t=1.5mm) ,be held there for specified time(5D series: 5±1 seconds and other series:10 s ),
and then be stored at room temperature and humidity for 1 to 2 hours. The change of V1mA and mechanical damages are examined.

No outstanding damage.

ΔV1mA /V1mA≤±5%.

Solvent resistance of marking

Solvent: alcohol  Rubbing material: cotton woolRecovery: 4hours.
Thereafter, visual examination and the change of  V1mA  shall be examined.

Legible marking.

Component Solvent resistance

Solvent:70±5% and F113+30±5% strange third mellow mixture，Solvent temperature:23⁺⁵℃，5±0.5Min.
Recovery:  4hours.
Thereafter, visual examination and the change of  V1mA  shall be examined.

No outstanding damage.

ΔV1mA /V1mA≤±5%.

Robustness of terminations Tensile Bending

After gradually applying the force specified below and keeping the unit fixed for ten seconds. The terminal shall be visually examined for and damage.

No outstanding damage.

Pulse shape half sine acceleration:490 m/s².
Pulse duration:11ms.
Thereafter, visual examination and the change of  V1mA  shall be examined.

No outstanding damage.

ΔV1mA /V1mA≤±5%.

Frequency range:10Hz--55Hz.
Amplitude: 0.75mm or 98 m/s² whichever is the less severe.
Total duration: 6 hours .
Thereafter, visual examination and the change of  V1mA  shall be examined.

No outstanding damage.

ΔV1mA /V1mA≤±5%.