SMD Varistors
Monolithic; Automotive Series
Construction
I
Cylindrical varistor element, encapsulated
I
Encapsulation: thermoplast, flame-retardant to UL 94 V-0
I
Termination: tinned copper alloy
Features
I
I
I
I
I
I
I
High energy absorption, particularly in case of load dump
Jump-start strength
Stable protection level, minimum leakage current
High resistance to cyclic temperature stress
Good solderability
Low inductance
PSpice models
Taping
I
Supply on 8/12-mm tape, for tape dimensions see pages 154/155,
for reel dimensions and packing units see page 157, chapter
“SMD Varistors: Taping”
Type designation
Detailed description of coding system on page 39, chapter
“General Technical Information”
SIOV-CU 4032 K 14 AUTO G2
EPCOS metal oxide varistor
Design
Size (nominal)
Tolerance
of varistor voltage
General technical data
Climatic category
LCT
UCT
Damp heat, steady state
(93 % r.h., 40
°
C)
Operating temperature
Storage temperature
Electric strength
Insulation resistance
Response time
Solderability
40/85/56
– 40
°
C
+ 85
°
C
56 days
– 40 … + 85
°
C
– 40 … + 125
°
C
in accordance with IEC 60068-1
Max. AC operating voltage
Taping mode
Automotive varistor
in accordance with IEC 60068-2-3
in accordance with CECC 42 000
in accordance with CECC 42 000
in accordance with CECC 42 000
in accordance with IEC 60068-2-58
in accordance with IEC 60068-2-20
³
2,5 kV
RMS
³
1,0 G
W
< 10 ns
235
°
C, 2 s
Resistance to soldering heat 260
°
C, 10 s
Note:
Contact EPCOS for consultancy if solvents on water-base are used for cleaning.
149
04/02
SMD Varistors
Monolithic; Automotive Series
Maximum ratings
(T
A
= 85
°
C)
Type
Ordering code
V
RMS
V
DC
V
14
14
17
17
30
30
V
16
16
20
20
34
34
i
max
8/20
m
s
A
100
250
100
250
100
250
W
max
(2 ms)
J
0,4
0,9
0,5
1,1
0,9
2,0
P
max
W
0,01
0,02
0,01
0,02
0,01
0,02
W
LD
(10x)
J
6
12
6
12
6
12
SIOV-
12-V supply systems
CU3225K14AUTOG2 B72650M1140K072
CU4032K14AUTOG2 B72660M1140K072
CU3225K17AUTOG2
CU4032K17AUTOG2
24-V supply systems
CU3225K30AUTOG2
CU4032K30AUTOG2
B72650M1170K072
B72660M1170K072
B72650M1300K072
B72660M1300K072
Characteristics
(T
A
= 25
°
C)
Type
V
Jump
V
v
(5 min) (1 mA)
V
22
22
27
27
47
47
D
V
v
(1 mA)
%
SIOV-
V
12-V supply systems
CU3225K14AUTOG2 25
CU4032K14AUTOG2 25
CU3225K17AUTOG2
CU4032K17AUTOG2
24-V supply systems
CU3225K30AUTOG2
CU4032K30AUTOG2
Notes
30
30
50
50
Max. clamping
voltage
v
i
V
A
43
43
53
53
93
93
1,0
2,5
1,0
2,5
1,0
2,5
Derating
V/I
char-
C
typ
(1 kHz) curve
acteristic
nF
1,4
2,3
1,2
1,9
0,6
1,1
Page
246
246
246
246
246
246
Page
274
275
274
275
274
275
±
10
±
10
±
10
±
10
±
10
±
10
I
If the maximum loads specified for load dump and jump start are fully utilized, subsequent
polarity reversal of the AUTO varistors is inadmissible.
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If the load remains under the maximum ratings, polarity reversal may be admissible.
Contact EPCOS for consultancy on this kind of problem.
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Load dump or jump start can decrease the varistor voltage in load direction by max. 15 %.
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Load dump: min. time of energy input 40 ms, interval 60 s.
150
04/02
SMD Varistors
Monolithic; Automotive Series
0,3 max.
b
h
3±0,3
1,5±0,3
VAR0392-L
Weight:
CU3225: approx. 0,5 g
CU4032: approx. 0,8 g
Dimensions
Type
SIOV-CU3225K14…30
SIOV-CU4032K14…30
I
mm
8,0
±
0,3
10,2
±
0,3
b
mm
6,3
±
0,3
8,0
±
0,3
h
mm
3,2
±
0,3
3,2
±
0,3
Termination: tinned copper alloy
B
C
B
A
D
VAR0391-D
Recommended solder pad layout
Type
SIOV-CU3225K14…30
SIOV-CU4032K14…30
A
mm
3,5
3,5
B
mm
2,8
2,8
C
mm
4,5
6,5
D
mm
10,1
12,1
151
04/02
A
h
Herausgegeben von EPCOS AG
Unternehmenskommunikation, Postfach 80 17 09, 81617 München, DEUTSCHLAND
++49 89 636 09, FAX (0 89) 636-2 26 89
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EPCOS AG 2002. Vervielfältigung, Veröffentlichung, Verbreitung und Verwertung dieser Broschüre und ihres Inhalts ohne aus-
drückliche Genehmigung der EPCOS AG nicht gestattet.
Bestellungen unterliegen den vom ZVEI empfohlenen Allgemeinen Lieferbedingungen für Erzeugnisse und Leistungen der Elek-
troindustrie, soweit nichts anderes vereinbart wird.
Diese Broschüre ersetzt die vorige Ausgabe.
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oder an unsere Vertriebsgesellschaften im Ausland. Bauelemente können aufgrund technischer Erfordernisse Gefahrstoffe ent-
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zuholen.
Published by EPCOS AG
Corporate Communications, P.O. Box 80 17 09, 81617 Munich, GERMANY
++49 89 636 09, FAX (0 89) 636-2 26 89
EPCOS AG 2002. Reproduction, publication and dissemination of this brochure 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.
This brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or the international Representa-
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