Reliability data
Test Test methods/conditions Requirement
Varistor voltage The voltage between two terminals with
the specified measuring current applied
is called V
V
(1 mA
DC
@ 0.2 ... 2 s).
To meet the specified value
Clamping voltage The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
To meet the specified value
Max. DC operating voltage MIL STD 202F, method 108A, UCT,
V
DC
, 1000 h
|∆V/V (1 mA)| ≤10%
No visible damage
Load dump ISO 7637-1, test pulse 5 (“load dump”)
(DIN 40 839 Part 1; impulse 5)
7 mm varistors (S07K…AUTO…):
10 × 12 J
10 mm varistors (S10K…AUTO…):
10 × 25 J
14 mm varistors (S14K…AUTO…):
10 × 50 J
20 mm varistors (S20K…AUTO…):
10 × 100 J
(minimum 40 ms time of energy input,
60 s interval)
∆V/V (1 mA) ≥-15%
No visible damage
Jump start V
DC, load
= V
jump
; 5 min duration
14 V (S…K14AUTO…); V
jump
= 25 V
17 V (S…K17AUTO…); V
jump
= 30 V
25 V (S…K25AUTO…); V
jump
= 40 V
30 V (S…K30AUTO…); V
jump
= 45 V
∆V/V (1 mA) ≥-15%
No visible damage
Fast temperature cycling IEC 60068-2-14, test Na, LCT/UCT,
dwell time 15 min, 100 cycles
for SIOV…AUTO types and dwell time
15 min, 1000 cycles for
SIOV…AUTOD1 types
|∆V/V (1 mA)| ≤5%
No visible damage
Damp heat IEC 60068-2-67, test Cy, 85 °C,
85% r. H., V
DC
, 1000 h
|∆V/V (1 mA)| ≤10%
No visible damage
Note:
UCT = Upper category temperature
LCT = Lower category temperature
Leaded varistors B722*
Automotive series
Page 6 of 24Please read Cautions and warnings and
Important notes at the end of this document.
