Features Applications

Standard size

Fast response time

High current rating

Stable performance over life

Very low capacitance

High insulation resistance

Reliable failsafe device

RoHS-compatible

Branch exchange (MDF)

Line protection

Station protection

Electrical specifications

DC spark-over voltage 1) 2) 4) 250

± 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

< 500

< 400

< 600

< 550

V

V

V

V

Service life

10 operations 50 Hz, 1 s 5) 10 A

1 operation 50 Hz, 0.18 s (9 cycles) 5) 50 A

10 operations [5x (+) & 5x (-)] 8/20 μs 5) 20 kA

1 operation 8/20 μs 5) 25 kA

1 operation 10/350 μs 5) 5 kA

300 operations 10/1000 μs 5) 200 A

Insulation resistance at 100 Vdc

4) > 10 GΩ

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 g

Storage temperature -40 ... +90 °C

Climatic category (IEC 60068-1) 40/ 90/ 21

Marking, blue negative

250 YY O

250 - Nominal voltage

YY - Year of production

O - Non radioactive