惠州市嵩隆力上电子

VDR Varistor

SONGLONG LISHANG

32D SERIES

Reliability Test

Mechanical Ratings

Test Parameter Test Condition / Description

Performance

Requirements

Terminal Pull

Strength

After gradually applying the load specified below and keeping

the unit fixed for ten seconds, the terminal shall be visually

examined for any damage.

Diameter

Loading

No visible damage

0.6mm

1.0 Kg

0.8mm

1.0 Kg

1.0mm

2.0 Kg

Terminal Bending

Strength

The unit shall be secured with its terminal kept vertical and the

weight specified below be applied in the axial direction. The

terminal shall gradually be bent by 90° in one direction, then 90°

in the opposite direction, and again back to the original position.

The damage of the terminal shall be visually examined.

Diameter

Loading

No visible damage

0.6mm

0.5 Kg

0.8mm

0.5 Kg

1.0mm

1.0 Kg

Vibration

The Specimen shall be vibrated by its lead wires with a total amplitude of 1.5㎜ and a

varying frequency of 10~55~10HZ(each minutes) for a period of 2 hours respectively in

each X,Yand Z directions.

No visible damage

△

VB/VB%≦±5%

Soldering-

solderability

After dipping the terminal to depth of approximately 3㎜ from the specimen in a soldering

bath of 260℃ for 10±1(D5: 5±1) seconds. Thereafter the terminal shall be visually

examined.

Terminations shall

be uniformly tinned

Soldering-

Resistance to

Solder Heat

After preheating the specimen, the specimen shall be completely immersed into a

soldering bath having a temperature of 260±5℃ for 10±1 (D5: 5±1) seconds or iron of

400±5℃ for 3±0.5 seconds. There after the change of Vb and mechanical damage shall

be examined.

No visible damage

△

VB/VB%≦±5%

ENVIRONMENTAL RATINGS

Dry Heat Loading

The specimen shall be applied continuously the maximum allowable voltage at the

specified conditions for specified period and then stored at room temperature and normal

humidity over 2 hours. Thereafter, the change of Vb and mechanical damage shall be

examined.

Ambient

temp：125±2℃

;

Period：1000±24hours.

△

VB/VB%≦±10%

High Temperature

Storage

In a drying oven without load.

Ambient temp：125±2℃ ;

period：1000±24hours

△

VB/VB%≦±5%

Damp Heat

Loading

The specimen shall be applied continuously the maximum allowable voltage at the

specified conditions for specified period and then stored at room temperature and normal

humidity over 2 hours. Thereafter, the change of Vb and mechanical damage shall be

examined.

Ambient

condition：40±2℃ , 90 to 95%R.H. ; period：1000±24 hours

△

VB/VB%≦±10%

Temperature

Cycle

Condition the specimen to each temperature form step 1

to step 4 in this order for the period shown in the table of

specifications. The change of Vb and mechanical

damage shall be examined after 2 hours.

Step

TempoC

Period

No visible damage

△

VB/VB%≦±10%

1

-40+3oC

30 min.

2

Room Temp

15 min.

3

85+2oC

30 min.

4

Room Temp

15 min.

Surge Lifetime

Rating

The change of Vb shall be measured after the impulse listed below is applied 10,000

times continuously with the interval of ten seconds at room temperature.

No visible damage

△

VB/VB%≦±10%

Voltage Proof

Voltage：2500VAC Leakage Current≦0.5mA Time：60 Seconds

No Breakdown

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