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
Endurance at upper
category temperature
100 h at UCT
After having continuously applied the
maximum allowable AC voltage at UCT
±2 °C for 1000 h, the specimen shall be
stored at room temperature and normal
humidity for 1 to 2 h.
Thereafter, the chance of V
V
shall be
measured.
|∆V/V (1 mA)| ≤10%
Load dump ISO 7637-2
Number of pulses: 10
Pulse interval: 60 s
Pulse duratin: 500 ms
|∆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
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
|∆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
Substrate bending test IEC 60068-2-21, test Ue1
Deflection = 2 mm
t = 60 s
|∆V/V (1 mA)| ≤10%
No visible damage
Shear test IEC 60068-2-21, test Ue3
Force = 5 N
t = 10 ±1 s
|∆V/V (1 mA)| ≤10%
No visible damage
Note:
UCT = Upper category temperature
LCT = Lower category temperature
SMD varistors (CU types) B726*
Automotive series
Page 6 of 15Please read Cautions and warnings and
Important notes at the end of this document.
