Ceramic transient voltage suppressors
SMD multilayer transient voltage suppressors for
automotive applications
Series/Type:
Date:
November 2012
© EPCOS AG 2012. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Multilayer varistors (MLVs)
Automotive series
EPCOS type designation system for automotive series
CN
Construction:
CT Single chip with
nickel barrier
termination (AgNiSn)
CN Single chip with
silver-palladium
termination (AgPd)
CN...K2 Single chip
with silver-platinum
termination (AgPt)
EAI case sizes:
0603
0805
1206
1210
1812
2220
Varistor voltage tolerance:
K
±10%,
standard
S Special tolerance
Maximum RMS operating voltage (V
RMS
):
14 14 V
V
RMS
< 25 V are suitable for 12 V DC supply systems
V
RMS
≥
25 V are suitable for 24 V DC supply systems
Special tolerance for the varistor voltage:
Standard tolerance
B Special tolerance
Automotive series
Special features:
Standard energy handling capability
E2 Increased energy handling capability
HT High temperature version
LC Low capacitance version
CC Controlled capacitance version
Taping mode:
G Taped, 180-mm reel, 7''
G2 Taped, 330-mm reel, 13''
AgPt termination
2220
S
14
B
AUTO
E2
G2
K2
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 71
Multilayer varistors (MLVs)
Automotive series
Features
ESD protection up to 25 kV, ISO 10605 level IV, acc.
to IEC 61000-4-2 level 4 (8 kV contact, 15 kV air)
High energy absorption capability
Low leakage current
High temperature versions
Stable protection level
Bidirectional clamping
No temperature derating up to 125
°C
RoHS-compatible
Nickel barrier and AgPt series suitable for lead-free
soldering
Nickel barrier and AgPt series qualified based on
AEC-Q200 rev. C
PSpice simulation models available
Applications
Transient overvoltage protection in automotive
applications: engine management, airbag, control
units, electrohydraulic brake, ABS/ESP, sunroof
Load dump protection
Jump start protection
Design
Multilayer technology
Lack of plastic or epoxy encapsulation for
flammability rating better than UL 94 V-0
Termination (see “Soldering directions”):
CT types with nickel barrier terminations (AgNiSn),
recommended for lead-free reflow and wave
soldering, and compatible with tin/lead solder.
CN types with silver-palladium terminations
(AgPd) only suitable for reflow and wave soldering
with solder on tin/lead basis and for adhesive
glueing.
CN...K2 types with silver-platinum terminations
(AgPt) suitable for reflow lead-free soldering.
V/I characteristics and derating curves
V/I and derating curves are attached to the data sheet.
The curves are sorted by V
RMS
and then by case size,
which is included in the type designation.
Single chip
Internal circuit
Available case sizes:
EIA
0603
0805
1206
1210
1812
2220
Metric
1608
2012
3216
3225
4532
5750
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 71
Multilayer varistors (MLVs)
Automotive series
General technical data
Maximum RMS operating voltage
Maximum DC operating voltage
Maximum surge current
Maximum load dump energy
Maximum jump start voltage
Maximum clamping voltage
Operating temperature
Operating temperature
Operating temperature
Operating temperature
Storage temperature
V
RMS,max
V
DC,max
(8/20 µs)
I
surge,max
(10 pulses)
W
LD
(5 min)
V
jump
(8/20 µs)
V
clamp,max
AUTO types
T
op
HT types
T
op
special capacitance types T
op
standard types
T
op
all types
LCT/UCT
14 ... 30
16 ... 38
5 ... 1200
1 ... 25
24.5 ... 45
40 ... 120
55/+125
55/+150
55/+125
55/+125
55/+150
V
V
A
J
V
V
°C
°C
°C
°C
°C
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 71
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