surge protection series

CTVS Ceramic transient voltage suppressors
SMD multilayer varistors (MLVs),
surge protection series
Series/Type:
Date:
March 2015
© EPCOS AG 2015. 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
1206
K
30
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
Maximum RMS operating voltage (VRMS):
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 40
E2
G
K2
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 VRMS,max ≤ 60 V)
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 VRMS and then by case size,
which is included in the type designation.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 40
Single chip
Internal circuit
Available case sizes:
EIA
0805
1206
1210
1812
2220
Metric
2012
3216
3225
4532
5750
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
(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)
VRMS,max
VDC,max
Isurge,max
Isurge,max
Vclamp,max
Top
Top
LCT/UCT
LCT/UCT
tresp
Temperature derating
Climatic category:
40/+85 °C for chip size 1812 (dedicated telecom types: CT1812S60AG2,
CT1812K75TELEG2, CT1812S95 AG2, CT1812K115TELEG2)
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 40
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
Multilayer varistors (MLVs)
Surge protection series
Electrical specifications and ordering codes
Maximum ratings (Top,max)
Type
Ordering code
VRMS,max VDC,max Isurge,max Isurge,max
Wmax Pdiss,max
(8/20 µs) (10/700 µs) (2 ms) (2 ms)
V
V
A
A
mJ
mW
High surge protection types, 8/20 µs surge rating, Top,max = +125 °C
CT2220K30E2G
B72540T6300K062
30
38
5000
CN2220K30E2GK2
B72542V6300K062
30
38
6000
CN2220K50E2GK2
B72542V6500K062
50
65
4500
CT2220K50E2G
B72540T6500K062
50
65
4500
Surge protection types, 8/20 µs surge rating, Top,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
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, Top,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 40
-
15000
15000
15000
15000
20
20
20
20
-
300
1100
2000
4200
12000
300
400
2000
4000
500
2300
4800
9000
600
1600
4500
5600
700
2000
5800
6800
3500
5
8
10
15
20
5
8
10
15
8
10
15
20
8
10
15
20
8
10
15
20
15
2200
2500
2800
3200
15
15
15
15
45
45
45
45
Multilayer varistors (MLVs)
Surge protection series
Characteristics (TA = 25 °C)
Type
VV
(1 mA)
V
∆VV
Vclamp,max
%
V
High surge protection types, 8/20 µs surge rating, Top,max = +125 °C
CT2220K30E2G
47
±10
77
CN2220K30E2GK2
47
±10
77
CN2220K50E2GK2
82
±10
135
CT2220K50E2G
82
±10
135
Surge protection types, 8/20 µs surge rating, Top,max = +125 °C
CT0805K30G
47
±10
77
CT1206K30G
47
±10
77
CT1210K30G
47
±10
77
CT1812K30G
47
±10
77
CT2220K30G
47
±10
77
CT0805K35G
56
±10
95
CT1206K35G
56
±10
90
CT1210K35G
56
±10
90
CT1812K35G
56
±10
90
CT1206K40G
68
±10
110
CT1210K40G
68
±10
110
CT1812K40G
68
±10
110
CT2220K40G
68
±10
110
CT1206K50G
82
±10
135
CT1210K50G
82
±10
135
CT1812K50G
82
±10
135
CT2220K50G
82
±10
135
CT1206K60G
100
±10
165
CT1210K60G
100
±10
165
CT1812K60G
100
±10
165
CT2220K60G
100
±10
165
CT1812K130G2
205
±10
340
Telecom types, 10/700 µs surge rating, Top,max = +85 °C
CT1812S60AG2
100
+19/1
200
CT1812K75TELEG2
120
±10
250
CT1812S95AG2
165
±10
270
CT1812K115TELEG2
180
±10
360
1) Measurement frequency: f = 1 MHz for C < 100 pF, f = 1 kHz for C ≥ 100 pF
Please read Cautions and warnings and
Important notes at the end of this document.
Page 6 of 40
Iclamp
(8/20 µs)
A
Ctyp1)
(1 MHz, 1 V)
pF
10
10
10
10
10000
10000
3000
3000
1
1
2.5
5
10
1
1
2.5
5
1
2.5
5
10
1
2.5
5
10
1
2.5
5
10
5
45
45
45
45
200
500
1000
2000
4000
150
200
600
1200
250
500
1000
2000
120
250
500
1000
100
200
400
800
200
400
320
250
200
Multilayer varistors (MLVs)
Surge protection series
Dimensional drawing
Dimensions in mm
Case size
EIA / mm
l
w
h
k
0201 / 0603
0.6 ±0.03
0.30 ±0.03
0.33 max.
0.15 ±0.05
0402 / 1005
1.0 ±0.15
0.50 ±0.10
0.6 max.
0.10 ... 0.30
0603 / 1608
1.6 ±0.15
0.80 ±0.10
0.9 max.
0.10 ... 0.40
0805 / 2012
2.0 ±0.20
1.25 ±0.15
1.4 max.
0.13 ... 0.75
1206 / 3216
3.2 ±0.30
1.60 ±0.20
1.7 max.
0.25 ... 0.75
1210 / 3225
3.2 ±0.30
2.50 ±0.25
1.7 max.
0.25 ... 0.75
1812 / 4532
4.5 ±0.40
3.20 ±0.30
2.5 max.
0.25 ... 1.00
2220 / 5750
5.7 ±0.40
5.00 ±0.40
2.5 max.1)
0.25 ... 1.00
1) hmax = 3.0 mm for type CN2220K30E2GK2, CN2220K50E2GK2, CT2220K30E2G and
CT2220K50E2G
Recommended solder pad layout
Dimensions in mm
Please read Cautions and warnings and
Important notes at the end of this document.
Case size
EIA / mm
A
B
C
0201 / 0603
0.30
0.25
0.30
0402 / 1005
0.60
0.60
0.50
0603 / 1608
1.00
1.00
1.00
0805 / 2012
1.40
1.20
1.00
1206 / 3216
1.80
1.20
2.10
1210 / 3225
2.80
1.20
2.10
1812 / 4532
3.60
1.50
3.00
2220 / 5750
5.50
1.50
4.20
Page 7 of 40
Multilayer varistors (MLVs)
Surge protection series
Delivery mode
EIA case size Taping
Single chip
0805
0805
1206
1206
1206
1206
1206
1210
1210
1210
1210
1210
1812
1812
1812
1812
1812
1812
1812
1812
1812
1812
2220
2220
2220
2220
2220
2220
2220
2220
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Blister
Reel size Packing unit Type
mm
pcs.
Ordering code
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
330
330
330
330
180
180
180
180
180
180
180
180
B72510T0300K062
B72510T0350K062
B72520T0300K062
B72520T0350K062
B72520T0400K062
B72520T0500K062
B72520T0600K062
B72530T0300K062
B72530T0350K062
B72530T0400K062
B72530T0500K062
B72530T0600K062
B72580T0300K062
B72580T0350K062
B72580T0400K062
B72580T0500K062
B72580T0600K062
B72580T0131K072
B72580T6111K072
B72580T0950S172
B72580T6750K072
B72580T0600S172
B72542V6300K062
B72542V6500K062
B72540T6300K062
B72540T6500K062
B72540T0300K062
B72540T0400K062
B72540T0500K062
B72540T0600K062
Please read Cautions and warnings and
Important notes at the end of this document.
3000
3000
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
1000
1000
1000
1000
1000
3000
3000
3000
4000
4000
600
600
600
600
1000
1000
1000
1000
CT0805K30G
CT0805K35G
CT1206K30G
CT1206K35G
CT1206K40G
CT1206K50G
CT1206K60G
CT1210K30G
CT1210K35G
CT1210K40G
CT1210K50G
CT1210K60G
CT1812K30G
CT1812K35G
CT1812K40G
CT1812K50G
CT1812K60G
CT1812K130G2
CT1812K115TELEG2
CT1812S95AG2
CT1812K75TELEG2
CT1812S60AG2
CN2220K30E2GK2
CN2220K50E2GK2
CT2220K30E2G
CT2220K50E2G
CT2220K30G
CT2220K40G
CT2220K50G
CT2220K60G
Page 8 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for high surge protection types
CN2220K30E2GK2
CN2220K50E2GK2
Please read Cautions and warnings and
Important notes at the end of this document.
Page 9 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for high surge protection types
CT2220K30E2G
CT2220K50E2G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 10 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT0805K30G
CT0805K35G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 11 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT1206K30G
CT1206K35G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 12 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT1206K40G
CT1206K50G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 13 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT1206K60G
CT1210K30G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 14 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT1210K35G
CT1210K40G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 15 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT1210K50G
CT1210K60G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 16 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT1812K30G
CT1812K35G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 17 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT1812K40G
CT1812K50G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 18 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT1812K60G
CT1812K130G2
Please read Cautions and warnings and
Important notes at the end of this document.
Page 19 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT2220K30G
CT2220K40G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 20 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for surge protection types
CT2220K50G
CT2220K60G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 21 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for telecom types
CT1812S60AG2
CT1812K75TELEG2
Please read Cautions and warnings and
Important notes at the end of this document.
Page 22 of 40
Multilayer varistors (MLVs)
Surge protection series
V/I characteristics for telecom types
CT1812S95AG2
CT1812K115TELEG2
Please read Cautions and warnings and
Important notes at the end of this document.
Page 23 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for high surge protection types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CN2220K30E2GK2
CN2220K50E2GK2, CT2220K50E2G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 24 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for high surge protection types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CT2220K30E2G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 25 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for surge protection types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CT0805K30G
CT0805K35G
CT1206K30G
CT1210K35G ... K60G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 26 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for surge protection types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CT1206K35G ... K60G
CT1210K30G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 27 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for surge protection types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CT1210K40G
CT2220K30G
CT1812K30G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 28 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for surge protection types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CT1812K35G ... K40G
CT1812K50G ... K60G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 29 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for surge protection types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CT1812K130G2
CT2220K40G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 30 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for surge protection types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CT2220K50G ... K60G
Please read Cautions and warnings and
Important notes at the end of this document.
Page 31 of 40
Multilayer varistors (MLVs)
Surge protection series
Derating curves for telecom types
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
CT1812S60AG2
CT1812K75TELEG2
CT1812S95AG2
CT1812K115TELEG2
Please read Cautions and warnings and
Important notes at the end of this document.
Page 32 of 40
Multilayer varistors (MLVs)
Surge protection series
Symbols and terms
For ceramic transient voltage suppressors (CTVS)
Symbol
Term
Cline,max
Maximum capacitance per line
Cline,min
Minimum capacitance per line
Cline,typ
Typical capacitance per line
Cmax
Maximum capacitance
Cmin
Minimum capacitance
Cnom
Nominal capacitance
∆Cnom
Tolerance of nominal capacitance
Ctyp
Typical capacitance
fcut-off,max
Maximum cut-off frequency
fcut-off,min
Minimum cut-off frequency
fcut-off,typ
Typical cut-off frequency
fres,typ
Typical resonance frequency
I
Current
Iclamp
Clamping current
Ileak
Leakage current
Ileak,max
Maximum leakage current
Ileak,typ
Typical leakage current
IPP
Peak pulse current
Isurge,max
Maximum surge current (also termed peak current)
LCT
Lower category temperature
Ltyp
Typical inductance
Pdiss,max
Maximum power dissipation
PPP
Peak pulse power
Rins
Insulation resistance
Rmin
Minimum resistance
RS
Resistance per line
RS,typ
Typical resistance per line
TA
Ambient temperature
Top
Operating temperature
Top,max
Maximum operating temperature
Tstg
Storage temperature
Please read Cautions and warnings and
Important notes at the end of this document.
Page 33 of 40
Multilayer varistors (MLVs)
Surge protection series
Symbol
Term
tr
Duration of equivalent rectangular wave
tresp
Response time
tresp,max
Maximum response time
UCT
Upper category temperature
V
Voltage
VBR,min
Minimum breakdown voltage
Vclamp,max
Maximum clamping voltage
VDC,max
Maximum DC operating voltage (also termed working voltage)
VESD,air
Air discharge ESD capability
VESD,contact
Contact discharge ESD capability
Vjump
Maximum jump-start voltage
VRMS,max
Maximum AC operating voltage, root-mean-square value
VV
Varistor voltage (also termed breakdown voltage)
VLD
Maximum load dump voltage
Vleak
Measurement voltage for leakage current
VV,min
Minimum varistor voltage
VV,max
Maximum varistor voltage
∆VV
Tolerance of varistor voltage
WLD
Maximum load dump energy
Wmax
Maximum energy absorption (also termed transient energy)
αtyp
Typical insertion loss
tan δ
Dissipation factor
Lead spacing
*
Maximum possible application conditions
All dimensions are given in mm.
The commas used in numerical values denote decimal points.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 34 of 40
Multilayer varistors (MLVs)
Surge protection series
For CeraDiodes
CeraDiode
Semiconductor diode
Cmax
Ctyp
Maximum capacitance
Typical capacitance
IBR
Ileak
IPP
IR, IT
IRM
IP, IPP
PPP
PPP
Top
Tstg
VBR
VBR,min
Vclamp
Vclamp,max
VDC
(Reverse) current @ breakdown voltage
(Reverse) leakage current
Current @ clamping voltage; peak pulse
current
Peak pulse power
Operating temperature
Storage temperature
VBR
Vcl, VC
VRM, VRWM, VWM, VDC
VDC,max
VESD,air
VESD,contact
Vleak
VRM, VRWM, VWM, VDC
- *)
- *)
IF
IRM, IRM,[email protected]
- *)
VF
(Reverse) breakdown voltage
Minimum breakdown voltage
Clamping voltage
Maximum clamping voltage
(Reverse) stand-off voltage, working
voltage, operating voltage
Maximum DC operating voltage
Air discharge ESD capability
Contact discharge ESD capability
(Reverse) voltage @ leakage current
Current @ forward voltage
(Reverse) current @ maximum reverse
stand-off voltage, working voltage,
operating voltage
Forward voltage
*) Not applicable due to bidirectional characteristics of CeraDiodes.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 35 of 40
Multilayer varistors (MLVs)
Surge protection series
Cautions and warnings
General
Some parts of this publication contain statements about the suitability of our ceramic transient
voltage suppressor (CTVS) components (multilayer varistors (MLVs)), CeraDiodes, ESD/EMI filters, leaded transient voltage/ RFI suppressors (SHCV types)) for certain areas of application, including recommendations about incorporation/design-in of these products into customer applications. The statements are based on our knowledge of typical requirements often made of our
CTVS devices in the particular areas. We nevertheless expressly point out that such statements
cannot be regarded as binding statements about the suitability of our CTVS components for a
particular customer application. As a rule, EPCOS is either unfamiliar with individual customer applications or less familiar with them than the customers themselves. For these reasons, it is always incumbent on the customer to check and decide whether the CTVS devices with the properties described in the product specification are suitable for use in a particular customer application.
Do not use EPCOS CTVS components for purposes not identified in our specifications,
application notes and data books.
Ensure the suitability of a CTVS in particular by testing it for reliability during design-in. Always
evaluate a CTVS component under worst-case conditions.
Pay special attention to the reliability of CTVS devices intended for use in safety-critical
applications (e.g. medical equipment, automotive, spacecraft, nuclear power plant).
Design notes
Always connect a CTVS in parallel with the electronic circuit to be protected.
Consider maximum rated power dissipation if a CTVS has insufficient time to cool down
between a number of pulses occurring within a specified isolated time period. Ensure that
electrical characteristics do not degrade.
Consider derating at higher operating temperatures. Choose the highest voltage class
compatible with derating at higher temperatures.
Surge currents beyond specified values will puncture a CTVS. In extreme cases a CTVS will
burst.
If steep surge current edges are to be expected, make sure your design is as low-inductance
as possible.
In some cases the malfunctioning of passive electronic components or failure before the end of
their service life cannot be completely ruled out in the current state of the art, even if they are
operated as specified. In applications requiring a very high level of operational safety and
especially when the malfunction or failure of a passive electronic component could endanger
human life or health (e.g. in accident prevention, life-saving systems, or automotive battery line
applications such as clamp 30), ensure by suitable design of the application or other measures
(e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by
third parties in the event of such a malfunction or failure. Only use CTVS components from the
automotive series in safety-relevant applications.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 36 of 40
Multilayer varistors (MLVs)
Surge protection series
Specified values only apply to CTVS components that have not been subject to prior electrical,
mechanical or thermal damage. The use of CTVS devices in line-to-ground applications is
therefore not advisable, and it is only allowed together with safety countermeasures like
thermal fuses.
Storage
Only store CTVS in their original packaging. Do not open the package prior to processing.
Storage conditions in original packaging: temperature 25 to +45°C, relative humidity ≤75%
annual average, maximum 95%, dew precipitation is inadmissible.
Do not store CTVS devices where they are exposed to heat or direct sunlight. Otherwise the
packaging material may be deformed or CTVS may stick together, causing problems during
mounting.
Avoid contamination of the CTVS surface during storage, handling and processing.
Avoid storing CTVS devices in harmful environments where they are exposed to corrosive
gases for example (SOx, Cl).
Use CTVS as soon as possible after opening factory seals such as polyvinyl-sealed packages.
Solder CTVS components after shipment from EPCOS within the time specified:
CTVS with Ni barrier termination, 12 months
CTVS with AgPt termination, 6 months
SHCV, 24 months
Handling
Do not drop CTVS components and allow them to be chipped.
Do not touch CTVS with your bare hands - gloves are recommended.
Avoid contamination of the CTVS surface during handling.
Washing processes may damage the product due to the possible static or cyclic mechanical
loads (e.g. ultrasonic cleaning). They may cause cracks to develop on the product and its parts,
which might lead to reduced reliability or lifetime.
Mounting
When CTVS devices are encapsulated with sealing material or overmolded with plastic
material, electrical characteristics might be degraded and the life time reduced.
Make sure an electrode is not scratched before, during or after the mounting process.
Make sure contacts and housings used for assembly with CTVS components are clean before
mounting.
The surface temperature of an operating CTVS can be higher. Ensure that adjacent
components are placed at a sufficient distance from a CTVS to allow proper cooling.
Avoid contamination of the CTVS surface during processing.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 37 of 40
Multilayer varistors (MLVs)
Surge protection series
Soldering
Complete removal of flux is recommended to avoid surface contamination that can result in an
instable and/or high leakage current.
Use resin-type or non-activated flux.
Bear in mind that insufficient preheating may cause ceramic cracks.
Rapid cooling by dipping in solvent is not recommended, otherwise a component may crack.
Operation
Use CTVS only within the specified operating temperature range.
Use CTVS only within specified voltage and current ranges.
Environmental conditions must not harm a CTVS. Only use them in normal atmospheric
conditions. Reducing the atmosphere (e.g. hydrogen or nitrogen atmosphere) is prohibited.
Prevent a CTVS from contacting liquids and solvents. Make sure that no water enters a CTVS
(e.g. through plug terminals).
Avoid dewing and condensation.
EPCOS CTVS components are mainly designed for encased applications. Under all
circumstances avoid exposure to:
direct sunlight
rain or condensation
steam, saline spray
corrosive gases
atmosphere with reduced oxygen content
EPCOS CTVS devices are not suitable for switching applications or voltage stabilization where
static power dissipation is required.
This listing does not claim to be complete, but merely reflects the experience of EPCOS AG.
Display of ordering codes for EPCOS products
The ordering code for one and the same EPCOS product can be represented differently in data
sheets, data books, other publications, on the EPCOS website, or in order-related documents
such as shipping notes, order confirmations and product labels. The varying representations of
the ordering codes are due to different processes employed and do not affect the
specifications of the respective products. Detailed information can be found on the Internet
under www.epcos.com/orderingcodes
Please read Cautions and warnings and
Important notes at the end of this document.
Page 38 of 40
Important notes
The following applies to all products named in this publication:
1. Some parts of this publication contain statements about the suitability of our products for
certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned. We
nevertheless expressly point out that such statements cannot be regarded as binding
statements about the suitability of our products for a particular customer application.
As a rule, EPCOS is either unfamiliar with individual customer applications or less familiar
with them than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether an EPCOS product with the properties described in the product specification is suitable for use in a particular customer application.
2. We also point out that in individual cases, a malfunction of electronic components or
failure before the end of their usual service life cannot be completely ruled out in the
current state of the art, even if they are operated as specified. In customer applications
requiring a very high level of operational safety and especially in customer applications in
which the malfunction or failure of an electronic component could endanger human life or
health (e.g. in accident prevention or lifesaving systems), it must therefore be ensured by
means of suitable design of the customer application or other action taken by the customer
(e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by
third parties in the event of malfunction or failure of an electronic component.
3. The warnings, cautions and product-specific notes must be observed.
4. In order to satisfy certain technical requirements, some of the products described in this
publication may contain substances subject to restrictions in certain jurisdictions (e.g.
because they are classed as hazardous). Useful information on this will be found in our Material Data Sheets on the Internet (www.epcos.com/material). Should you have any more detailed questions, please contact our sales offices.
5. We constantly strive to improve our products. Consequently, the products described in this
publication may change from time to time. The same is true of the corresponding product
specifications. Please check therefore to what extent product descriptions and specifications
contained in this publication are still applicable before or when you place an order. We also
reserve the right to discontinue production and delivery of products. Consequently, we
cannot guarantee that all products named in this publication will always be available. The
aforementioned does not apply in the case of individual agreements deviating from the foregoing for customer-specific products.
6. Unless otherwise agreed in individual contracts, all orders are subject to the current version of the "General Terms of Delivery for Products and Services in the Electrical Industry" published by the German Electrical and Electronics Industry Association
(ZVEI).
Page 39 of 40
Important notes
7. The trade names EPCOS, Alu-X, CeraDiode, CeraLink, CeraPad, CeraPlas, CSMP, CSSP,
CTVS, DeltaCap, DigiSiMic, DSSP, ExoCore, FilterCap, FormFit, LeaXield, MiniBlue,
MiniCell, MKD, MKK, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, PQSine,
SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV, SIP5D,
SIP5K, TFAP, ThermoFuse, WindCap are trademarks registered or pending in Europe and
in other countries. Further information will be found on the Internet at
www.epcos.com/trademarks.
Page 40 of 40