Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.

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“ZNR” Transient/Surge Absorbers (Type E)

Characteristics

Test Methods/Description

Specifications

Standard Test

Condition

Electrical characteristics shall be measured at following conditions

(Temperature: 5 to 35 °C,Humidity: Max. 85 %)

———

Varistor Voltage

The voltage between two terminals with the specified measuring

be made as fast as possible to avoid heat affection.

To meet the

specified value.

Maximum Allowable

Voltage

The maximum sinusoidal wave voltage (rms) or the maximum DC

voltage that can be applied continuously.

Clamping Voltage

The maximum voltage between two terminals with the specified

standard impulse current (8/20 μs).

Rated Power

The maximum power that can be applied within the specified

ambient temperature.

Energy

The maximum energy within the varistor voltage change of ±10 %

when one impulse of 2 ms is applied.

Maximum

Peak Current

2 times

The maximum current within the varistor voltage change of ±10 %

with the standard impulse current (8/20 μs) applied two times with

an interval of 5 minutes.

1 time

The maximum current within the varistor voltage change of ±10 %

with the standard impulse current (8/20 μs) applied one time.

Temperature Coefficient

of Varistor Voltage

50

0 to –0.05 %/°C max.

Impulse Life

The change of Vc shall be measured after the impulse listed

below is applied 10000 times continuously with the interval of ten

seconds at room temperature.

20 Series

200 A (8/20 μs)

32 Series

300 A (8/20 μs)

< ±10 %

Withstanding Voltage

(Body Insulation)

The commercial frequency voltage of AC 2.5 kV shall be applied

between terminals and the bottom of the unit for one minute.

No remarkable

damage

Robustness of

Terminations

(Tensile)

After gradually applying the load of 49 N (5 kgf) and keeping the

unit fixed for 10 seconds in an axial direction, the terminal shall

be visually examined for any damage.

No remarkable

damage

Vibration

After repeadly applying a single harmonic vibration (amplitude:

0.75 mm): double amplitude: 1.5 mm with 1 minute vibration

frequency cycles (10 Hz to 55 Hz to 10 Hz) to each of three

perpendicular directions for 2 hours.

Thereafter, the damage of

the terminals is visually examined.

Dry Heat/ High

Temperature

Storage

The specimen shall be subjected to 110±3 °C for 500 hours

in a thermostatic bath without load and then stored at room

temperature and humidity for one to two hours.

Thereafter, the

change of Vc shall be measured.

Step

Temperature (°C)

Period (minutes)

30

+3

2

Room Temp.

3 max.

385

+3

30

+3

4

Room Temp.

3 max.

< ±5 %

Temperature Cycle

The temperature cycle shown below shall be repeated five

times and then stored at room temperature and humidity for

one to two hours.

The change of Vc and mechanical damage

shall be examined.

No remarkable

damage

< ±5 %

Dry Heat Load/

High Temperature

Load

After being continuously applied the Maximum Allowable Voltage

at 85±5 °C for 500 hours, the specimen shall be stored at room

temperature and humidity for one to two hours.

Thereafter, the

change of Vc shall be measured.

< ±10 %

Damp Heat/Humidity

(Steady State)

The specimen shall be subjected to 40±2 °C, 90 to 95 %RH for

1000 hours without load and then stored at room temperature

and humidity for one to two hours. Thereafter, the change of Vc

shall be measured.

< ±5 %

0

0

0

0

Performance Characteristicsv (Type E)

Mar. 2017

03