Surge arrester
3-electrode arrester
Series/Type: T21-A350X
Ordering code: B88069X5120B252
Version/Date: Issue 07 / 2007-04-23
Version: 01
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Identification/Classification 1: Surge arrester
(header 1 + top left header bar)
Identification/Classification 2: 3-electrode arrester
(header 2 + bottom left header bar)
Ordering code: B88069X5120B252
(top right header bar)
Series/Type: T21-A350X
(top right header bar)
Preliminary data (optional):
(if necessar EPCOS AG y) 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the information
contained therein without EPCOS' prior express consent is prohibited.
Department: KB AB E / KB AB PM
Date: Issue 07 / 2007-04-23
EPCOS AG is a TDK Group Company.
Surge arrester B88069X5120B252
3-electrode arrester T21-A350X
Features Applications
Standard size Line protection
Fast response time Station protection
Very high current rating Base stations
Stable performance over life
Very low capacitance
High insulation resistance
RoHS-compatible
Electrical specifications
1) 2) 4)
DC spark-over voltage 350 V
%
20
4)
Impulse spark-over voltage
at 100 V/s - for 99 % of measured values < 650 V
- typical values of distribution < 550 V
at 1 kV/s - for 99 % of measured values < 700 V
- typical values of distribution < 600 V
Service life
5)
10 operations 50 Hz; 1 s 10 A
5)
1 operation 50 Hz; 9 cycles 50 A
5)
10 operations 8/20 s 20 kA
5)
1 operation 8/20 s 25 kA
5)
1 operation 10/350 s 5 kA
4)
Insulation resistance at 100 V > 10
dc G
4)
Capacitance at 1 MHz < 1.5 pF
3)
Transverse delay time < 0.2 s
Arc voltage at 1 A ~ 35 V
Glow to arc transition current ~ 1 A
Glow voltage ~ 200 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
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.