Surge arrester

B88069X8860B502

3-electrode arrester

T23-A250XF4

KB AB E / KB AB PM

Issue 06 / 2007-10-18

Please read Cautions and warnings and

Page 3 of 4

Important notes at the end of this document.

1)

At delivery AQL 0.65 level II, DIN ISO 2859

2)

In ionized mode

3)

Test according to ITU-T Rec. K.12

4)

Tip or ring electrode to center electrode

5)

Total current through center electrode, half value through

tip respectively ring electrode.

Terms in accordance with ITU-T Rec. K.12 and DIN 57845/VDE0845

The arrester failsafe mechanism contains a solder pellet with a melting

temperature between 193 and 203 °C.

Dimensional drawing

Cautions and warnings

The short-circuit spring does not trigger until 180 °C is reached depending on the material. Care

must be taken to limit the thermal radiation onto adjacent parts to safe values.

Depending on the incorporation position, the surge arrester may have to be additionally secured

by mechanical means.

Surge arresters must not be operated directly in power supply networks.

Surge arresters may become hot in case of longer periods of current stress (danger of burning).

Surge arresters may be used only within their specified values. In case of overload, the head

contacts may fail or the component may be destroyed.

Damaged surge arresters must not be re-used.

Not to scale

Dimensions in mm

Non controlled document