SFS14 EPCOS AG, SFS14 Datasheet - Page 4

• Manufacturer Part Number: SFS14
• Description: Siov Metal Oxide Varistors Housed Fail-safe Varistors
• Manufacturer: EPCOS AG

Reliability data
Test
Varistor voltage
Clamping voltage
Surge current derating,
8/20 µs
Surge current derating,
2 ms
Overvoltage test
Please read Cautions and warnings and
Important notes at the end of this document.
Housed varistors
Fail-safe varistor, SFS14 series
Test methods/conditions
The voltage between two terminals with
the specified measuring current applied
is called V
The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
CECC 42 000, test C 2.1
100 surge currents (8/20 µs), unipolar,
interval 30 s, amplitude corresponding
to derating curve for 100 impulses
at 20 µs
CECC 42 000, test C 2.1
100 surge currents (2 ms), unipolar,
interval 120 s, amplitude corresponding
to derating curve for 100 impulses
at 2 ms
The varistor should be subjected to
V
until it failed, in series with 5 A fuse and
5 Ω resistor (based on S14 series).
RMS
test (V
v
(1 mA
RMS
= 0.85 V
DC
4
@ 0.2 … 2 s).
11/07
v
(1 mA))
Requirement
To meet the specified value.
To meet the specified value.
|
(measured in direction
of surge current)
No visible damage
|
(measured in direction
of surge current)
No visible damage
No flame, no rupture
∆V/V (1 mA)
∆V/V (1 mA)
|
|
≤10%
≤10%