Surge arrester

B88069X5120B252

3-electrode arrester

T21-A350X

KB AB E / KB AB PM

Issue 07 / 2007-04-23

Please read Cautions and warnings and

Page 2 of 4

Important notes at the end of this document.

Features

Applications

Standard size

Fast response time

Very high current rating

Stable performance over life

Very low capacitance

High insulation resistance

RoHS-compatible

Line protection

Station protection

Base stations

Electrical specifications

DC spark-over voltage

1) 2) 4)

350

± 20

V

%

Impulse spark-over voltage

4)

at 100 V/µs

- for 99 % of measured values

- typical values of distribution

at 1 kV/µs

- for 99 % of measured values

- typical values of distribution

< 650

< 550

< 700

< 600

V

V

V

V

Service life

10 operations

50 Hz; 1 s

5)

10

A

1 operation

50 Hz; 9 cycles

5)

50

A

10 operations

8/20 µs

5)

20

kA

1 operation

8/20 µs

5)

25

kA

1 operation

10/350 µs

5)

5

kA

4)

> 10

G

Ω

Capacitance at 1 MHz

4)

< 1.5

pF

Transverse delay time

3)

< 0.2

µs

Arc voltage at 1 A

Glow to arc transition current

Glow voltage

~ 35

~ 1

~ 200

V

A

V

Weight

~ 2.2

g

Operation and storage temperature

-40 ... +90

°C

Climatic category (IEC 60068-1)

40/ 90/ 21

Marking, blue negative

350 YY O

350

- Nominal voltage

YY

- Year of production

O

- Non radioactive