CTVS
Ceramic transient voltage suppressors
SMD multilayer varistors (MLVs),
surge protection series
Series/Type:
Date:
May 2017
© EPCOS AG 2017. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Multilayer varistors (MLVs)
Surge protection series
EPCOS type designation system for surge protection series
CT
Construction:
CT Single chip
with nickel barrier
termination
(AgNiSn)
CN Single chip
with silver-platin
temination (AgPt)
Case sizes:
0805
1206
1210
1812
2220
Tolerance of the varistor voltage:
K
±10%,
standard
S Special tolerance
1206
K
30
E2
G
K2
Maximum RMS operating voltage (V
RMS
):
30 30 V
Features:
E2 Increased energy handling capability
TELE Specified for 10/700 µs pulses, acc. to telecom standards
A Special tolerance
Taping mode:
G 180-mm reel, 7''
G2 330-mm reel, 13''
Termination:
K2 Code for AgPt termination (CN types only)
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 57
Multilayer varistors (MLVs)
Surge protection series
Description
The surge protection series comprises a range of multilayer varistors for protection against
severe transient overvoltage and high surge currents, such as 8/20 µs pulses with peak
currents up to 6000 A and 10/700 µs pulses up to 45 A.
Features
High energy absorption capability
High surge load capability acc. to IEC 61000-4-5
Reliable ESD protection up to 30 kV acc. to
IEC 61000-4-2, level 4
High surge voltage capability up to 2 kV for
10/700 µs acc. to IEC 61000-4-5 (types with
V
RMS,max
≤
60 V)
UL approval to UL 1449 (file number E481997)
Bidirectional protection
Low leakage current
Long-term ESD stability
RoHS-compatible, lead-free
PSpice simulation modesl available
Applications
Industrial applications
Building safety and security applications
Power supplies
Control and measurement equipment
Hard disk drives
Design
Multilayer technology
Flammability rating better than UL 94 V-0
Termination (see “Soldering directions”):
CT types with nickel barrier terminations (AgNiSn),
recommended for lead-free soldering, and
compatible with tin/lead solder
CN types with silver-platin termination (AgPt) for
reflow and wave soldering with solder on tin/lead
basis or lead-free with a silver containing solder
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
0805
1206
1210
1812
2220
Metric
2012
3216
3225
4532
5750
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 57
Multilayer varistors (MLVs)
Surge protection series
General technical data
Maximum RMS operating voltage
Maximum DC operating voltage
Maximum surge current
Maximum surge current
Maximum clamping voltage
Operating temperature
Operating temperature
Storage temperature
Storage temperature
Response time
Temperature derating
Climatic category:
40/+85
°C
for chip size 1812 (dedicated telecom types: CT1812S60AG2,
CT1812K75TELEG2, CT1812S95 AG2, CT1812K115TELEG2)
V
RMS,max
V
DC,max
I
surge,max
I
surge,max
V
clamp,max
T
op
T
op
LCT/UCT
LCT/UCT
t
resp
30 ... 115
38 ... 150
40 ... 6000
45
77 ... 360
55/+125
40/+85
55/+150
40/+125
< 0.5
V
V
A
A
V
°C
°C
°C
°C
ns
(8/20 µs)
(10/700 µs)
(8/20 µs surge ratings)
(10/700 µs surge ratings)
(8/20 µs surge ratings)
(10/700 µs surge ratings)
Climatic category:
55/+125
°C
for chip sizes 0805, 1206, 1210, 1812, and 2220
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 57
Multilayer varistors (MLVs)
Surge protection series
Electrical specifications and ordering codes
Maximum ratings (T
op,max
)
Type
Ordering code
V
RMS,max
V
DC,max
I
surge,max
I
surge,max
W
max
P
diss,max
(8/20 µs) (10/700 µs) (2 ms) (2 ms)
V
V
A
A
mJ
mW
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
45
45
45
45
15000
15000
15000
15000
15000
15000
15000
300
1100
2000
4200
12000
300
400
2000
4000
500
2300
4800
9000
600
1600
4500
5600
3000
700
2000
5800
6800
3500
2200
2500
2800
3200
20
20
20
20
20
20
20
5
8
10
15
20
5
8
10
15
8
10
15
20
8
10
15
20
10
8
10
15
20
15
15
15
15
15
High surge protection types, 8/20 µs surge rating, T
op,max
= +125
°C
CT2220K30E2G
B72540T6300K062
30
38
5000
CN2220K30E2GK2
B72542V6300K062
30
38
6000
CN2220K50E2GK2
B72542V6500K062
50
65
4500
CN2220S50E2GK2
B72542V6500S162
50
63
4500
CT2220K50E2G
B72540T6500K062
50
65
4500
CT2220S50E3G
B72540T6500S162
50
63
4500
CN2220K60E2GK2
B72542V6600K062
60
85
4500
Surge protection types, 8/20 µs surge rating, T
op,max
= +125
°C
CT0805K30G
B72510T0300K062
30
38
80
CT1206K30G
B72520T0300K062
30
38
200
CT1210K30G
B72530T0300K062
30
38
300
CT1812K30G
B72580T0300K062
30
38
800
CT2220K30G
B72540T0300K062
30
38
1200
CT0805K35G
B72510T0350K062
35
45
80
CT1206K35G
B72520T0350K062
35
45
100
CT1210K35G
B72530T0350K062
35
45
250
CT1812K35G
B72580T0350K062
35
45
500
CT1206K40G
B72520T0400K062
40
56
100
CT1210K40G
B72530T0400K062
40
56
250
CT1812K40G
B72580T0400K062
40
56
500
CT2220K40G
B72540T0400K062
40
56
1000
CT1206K50G
B72520T0500K062
50
65
100
CT1210K50G
B72530T0500K062
50
65
200
CT1812K50G
B72580T0500K062
50
65
400
CT2220K50G
B72540T0500K062
50
65
800
CT1210K50E2G
B72530T6500K062
50
65
1200
CT1206K60G
B72520T0600K062
60
85
100
CT1210K60G
B72530T0600K062
60
85
200
CT1812K60G
B72580T0600K062
60
85
400
CT2220K60G
B72540T0600K062
60
85
800
CT1812K130G2
B72580T0131K072 130
170
250
Telecom types, 10/700 µs surge rating, T
op,max
= +85
°C
CT1812S60AG2
B72580T0600S172
60
85
400
CT1812K75TELEG2 B72580T6750K072
75
100
400
CT1812S95AG2
B72580T0950S172
95
125
250
CT1812K115TELEG2 B72580T6111K072 115
150
250
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 57
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