SIOV metal oxide varistors
Leaded varistors, Telecom series
Series/Type:
Date:
B722*
December 2011
© EPCOS AG 2011. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Leaded varistors
Telecom series
B722*
Construction
Round varistor element, leaded
Coating: epoxy resin, flame-retardant to UL 94 V-0
Features
Suitable for handling the surge current of the 10/700 µs pulse
to ITU-T and IEC 1000-4-5
Suitable for handling the increased surge voltage according
to the directives of Germany’s Central Telecommunications Engineering Bureau (FTZ)
Matched to line conditions with or without superimposed ringing voltage
PSpice models
Delivery mode
Bulk (standard), taped versions on reel or in Ammo pack upon request.
For further details refer chapter "Taping, packaging and lead configuration" for leaded
varistors.
General technical data
Climatic category
Operating temperature
Storage temperature
Electric strength
Insulation resistance
Response time
to IEC 60068-1
to IEC 61051
to IEC 61051
to IEC 61051
40/85/56
40 ... + 85
40 ... +125
≥
2.5
≥
100
< 25
°C
°C
kV
RMS
MΩ
ns
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 20
Leaded varistors
Telecom series
B722*
Electrical specifications and ordering codes
Maximum ratings (T
A
= 85
°C)
Ordering code
Type
SIOV-
S07S60AGS2
S07S95AGS2
V
RMS
V
60
95
V
DC
V
85
125
i (10
×)
(10/700 µs)
A
1)
45
45
i
max
(8/20 µs)
A
1200
1200
W
max
(2 ms)
J
4.8
7.6
P
max
W
0.25
0.25
B72207S0600S212
B72207S0950S212
Characteristics (T
A
= 25
°C)
Ordering code
Type
SIOV-
S07S60AGS2
S07S95AGS2
V
v
(1 mA)
V
100
150
∆V
v
(1 mA)
%
+18/ 1
+10/ 2
v
c,max
(i
c
)
V
200
270
i
c
A
45
45
C
typ
(1 kHz)
pF
480
260
B72207S0600S212
B72207S0950S212
Note:
In addition to the telecom varistors listed above, all varistors of the standard series can be used
for telecom applications if the selection criteria are considered.
Dimensional drawings
Weight
Nominal diameter
mm
7
V
RMS
V
60; 95
Weight
g
0.6 ... 0.8
The weight of varistors in between these voltage
classes can be interpolated.
Dimensions
Ordering code
B72207S0600S212
B72207S0950S212
[e] +0.6/-0.1
mm
5.0
5.0
a
±1
mm
1.2
1.3
w
max
mm
9.0
9.0
th
max
mm
3.3
3.4
h
max
mm
12.0
12.0
l
min
mm
(*)
(*)
d
±0.05
mm
0.6
0.6
For (*) see chapter "Taping, packing and lead configuration".
1) The test circuit according to figure 15 in chapter "Application notes" yields a surge current amplitude of approx. 45 A.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 20
Leaded varistors
Telecom series
B722*
Reliability data
Test
Varistor voltage
Test methods/conditions
Requirement
The voltage between two terminals with To meet the specified value
the specified measuring current applied
is called V
V
(1 mA
DC
@ 0.2 ... 2 s).
The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
1000 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 change of V
V
shall be
measured.
10 surge currents (8/20
µs),
unipolar,
interval 30 s, amplitude corresponding
to derating curve for 10 impulses at
20
µs
|∆V/V (1 mA)|
≤10%
(measured in direction of
surge current)
No visible damage
To meet the specified value
Clamping voltage
Endurance at upper
category temperature
|∆V/V (1 mA)|
≤10%
Surge current derating,
8/20
µs
Surge current derating,
2 ms
10 surge currents (2 ms), unipolar,
|∆V/V (1 mA)|
≤10%
interval 120 s, amplitude corresponding (measured in direction of
to derating curve for 10 impulses at
surge current)
2 ms
No visible damage
IEC 61000-4-5
|∆V/V (1 mA)|
≤10%
Pulse current testing: 10/700
µs,
No visible damage
open circuit voltage = 2 kV.
Number of pulses: 10 (5 times for each
polarity). Pulse interval 60 s.
IEC 61051-1, test 4.9.2
Metal balls method, 2500 V
RMS
, 60 s
The varistor is placed in a container
holding 1.6
±0.2
mm diameter metal
balls such that only the terminations of
the varistor are protruding.
The specified voltage shall be applied
between both terminals of the specimen
connected together and the electrode
inserted between the metal balls.
No breakdown
Surge current derating,
10/700
µs
Electric strength
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 20
Leaded varistors
Telecom series
B722*
Test
Climatic sequence
Test methods/conditions
CECC 42 000, test 4.16
The specimen shall be subjected to:
a) dry heat at UCT, 16 h, IEC
60068-2-2, test Ba
b) damp heat, 1st cycle:
55
°C,
93% r. H., 24 h, IEC
60068-2-30, test Db
c) cold, LCT, 2 h, IEC 60068-2-1, test
Aa
d) damp heat, additional 5 cycles:
55
°C/25 °C,
93% r. H., 24 h/cycle,
IEC 60068-2-30, test Db
Then the specimen shall be stored at
room temperature and normal humidity
for 1 to 2 h.
Thereafter, the change of V
V
shall be
measured. Thereafter, insulation resis-
tance R
ins
shall be measured at V = 500
V.
Requirement
|∆V/V (1 mA)|
≤10%
R
ins
≥100
MΩ
Rapid change of
temperature
IEC 60068-2-14, test Na, LCT/UCT,
dwell time 30 min, 5 cycles
The temperature cycle shown below
shall be repeated 5 times. Then the
specimen shall be stored at room
temperature and normal humidity for
1 to 2 h. The change of V
V
and
mechanicaldamage shall be examined.
Step
1
2
3
Temperature
LCT
±3 °C
transition time
UCT
±2 °C
Period
30
±3
min
<10 s
30
±3
min
|∆V/V (1 mA)|
≤5%
No visible damage
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 20
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