Surge Arrester
T20-A420X
3-Electrode-Arrester
Ordering code:
B88069X7820C203
AB E / AB PM
Issue 01, 17.05.2002
Page 1 of 2
DC spark-over voltage
1) 2) 4)
350 ... 550
V
Impulse spark-over voltage
4)
at 100 V/s
- for 99 % of measured values
- typical values of distribution
at 1 kV/s
- for 99 % of measured values
- typical values of distribution
< 750
< 700
< 850
< 800
V
V
V
V
Nominal impulse discharge current (wave 8/20 s)
5)
Single impulse discharge current
(wave 8/20 s)
5)
20
25
kA
kA
Nominal alternating discharge current (50 Hz, 1 s)
5)
Alternating discharge current (50 Hz, 9 cycles)
5)
10
50
A
A
Insulation resistance at 100 V
dc
4)
> 10
G
Capacitance at 1 MHz
4)
< 1.5
pF
Transverse delay time
3)
< 0.2
s
Arc voltage at 1 A
Glow to arc transition current
Glow voltage
~ 30
~ 1
~ 200
V
A
V
Weight
~ 2
g
Operation and storage temperature
-40 ... +90
C
Climatic category (IEC 60068-1)
40/ 90/ 21
Marking, blue
420 YY M O
420
- Nominal voltage
YY
- Year of production
M
- Month of production
(1 ... 9 = Jan ... Sep;
O ... D = Oct ... Dec)
O
- Non radioactive
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
Surge Arrester
T20-A420X
3-Electrode-Arrester
Ordering code:
B88069X7820C203
EPCOS AG 2002. Reproduction, publication and dissemination of this data sheet, enclosures hereto and the information
contained therein without EPCOS' prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of the Electrical and
Electronics Industry recommended by the ZVEI (German Electrical and Electronic Manufacturers' Association), unless
otherwise agreed.
AB E / AB PM
Issue 01, 17.05.2002
Page 2 of 2
Not to scale
Dimensions in mm
Non controlled document
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