CTVS
Ceramic transient voltage suppressors
Leaded transient voltage/RFI suppressors (SHCVs)
Series/Type:
Date: February 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.
EPCOS type designation system for leaded transient voltage/ RFI suppressors
SR 1 S 14 B M 474 X G
SR Leaded,
SHCV series
EIA case sizes of used chips:
612 x 06 / 3.2 x 1.6 mm
118 x 12 / 4.5 x 3.2 mm
222 x 20 / 5.7 x 5.0 mm
Varistor voltage tolerance:
K±10%
SSpecial tolerance
Maximum RMS operating voltage (VRMS):
14 14 V
20 20 V
35 35 V
Special varistor voltage tolerance:
BSpecial tolerance
Capacitance tolerance:
M±20%
Capacitance value:
474 47 104pF 0.47 µF
Capacitor ceramic:
XX7R
Taping mode:
GTaped version
Bulk
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 2 of 22Please read Cautions and warnings and
Important notes at the end of this document.
1) Operating temperatures above +85 °C can cause a change in color of the coating material, which has no impact on the reliability of the
components.
Features
EMI/ RFI noise suppression and transient overvoltage protection integrated in
a single component
Suppression of transients, caused by sudden interruption of currents
Protection against electrical transients in automotive battery lines
(acc. to ISO 7637-2 and ISO 16750-2)
High capacitance (up to 4.7 µF)
Low clamping voltage
RoHS-compatible
Suitable for lead-free soldering
PSpice simulation models available
Applications
RFI noise suppression and transient overvoltage protection on DC lines of
small motors, windscreen wipers, window lifters, mirrors, central locking,
memory seat, sunroof
Design
Combination of multilayer RF filter capacitor and multilayer varistor
Coating: flame-retardant to UL 94 V0, epoxy resin
Terminals: tinned iron wire, RoHS-compatible
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.
General technical data
Maximum RMS operating voltage VRMS,max 14 ... 35 V
Maximum DC operating voltage VDC,max 16 ... 45 V
Maximum surge current (8/20 µs) Isurge,max 100 ... 1200 A
Maximum load dump energy (10 pulses) WLD 1.5 ... 12 J
Maximum jump-start voltage (5 min) Vjump 24.5 ... 45 V
Maximum clamping voltage (8/20 µs) Vclamp,max 38 ... 90 V
Nominal capacitance (1 kHz, 0.5 V) Cnom 220 ... 4700 nF
Insulation resistance Rins ≥10 MΩ
Response time tresp < 25 ns
Operating temperature 1) Top 55/+125 °C
Storage temperature LCT/UCT 55/+150 °C
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 3 of 22Please read Cautions and warnings and
Important notes at the end of this document.
Electrical specifications and ordering codes
Maximum ratings (Top,max = 125 °C)
Type Ordering code VRMS,max
V
VDC,max
V
Isurge,max
(8/20 µs)
A
Wmax
(2 ms)
mJ
WLD
(10
pulses)
J
Pdiss,max
mW
SR1S14BM105X B72587G3140S200 14 16 800 2400 6 15
SR1S14BM155X B72587H3140S200 14 16 800 2400 6 15
SR1S14BM474X B72587E3140S200 14 16 800 2400 6 15
SR2S14BM155X B72547H3140S200 14 16 1200 5800 12 30
SR2S14BM474X B72547E3140S200 14 16 1200 5800 12 30
SR2S14BM475X B72547L3140S200 14 16 1200 5800 12 30
SR6K14M224X B72527C3140K000 14 18 200 500 1.5 8
SR1K20M105X B72587G3200K000 20 26 800 3000 6 15
SR1K20M155X B72587H3200K000 20 26 800 3000 6 15
SR1K20M225X B72587J3200K000 20 26 800 3000 6 15
SR1K20M474X B72587E3200K000 20 26 800 3000 6 15
SR2K20M105X B72547G3200K000 20 26 1200 7800 12 30
SR2K20M155X B72547H3200K000 20 26 1200 7800 12 30
SR2K20M474X B72547E3200K000 20 26 1200 7800 12 30
SR6K20M105X B72527G3200K000 20 26 200 700 1.5 8
SR1K30M155X B72587H3300K000 30 38 800 4200 6 15
SR6K35M105X B72527G3350K000 35 45 100 400 1.5 8
SR6K35M474X B72527E3350K000 35 45 100 400 1.5 8
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 4 of 22Please read Cautions and warnings and
Important notes at the end of this document.
Characteristics (TA=25°C)
Type VV
(1 mA)
V
∆VV
%
Vjump
(5 min)
V
Vclamp,max
V
Iclamp
(8/20 µs)
A
Cnom
(1 kHz, 0.5 V)
nF
∆Cnom
%
SR1S14BM105X 22 +23/0 24.5 40 5 1000 ±20
SR1S14BM155X 22 +23/0 24.5 40 5 1500 ±20
SR1S14BM474X 22 +23/0 24.5 40 5 470 ±20
SR2S14BM155X 22 +23/0 24.5 40 10 1500 ±20
SR2S14BM474X 22 +23/0 24.5 40 10 470 ±20
SR2S14BM475X 22 +23/0 24.5 40 10 4700 ±20
SR6K14M224X 22 ±10 24.5 38 1 220 ±20
SR1K20M105X 33 ±10 26 58 5 1000 ±20
SR1K20M155X 33 ±10 26 58 5 1500 ±20
SR1K20M225X 33 ±10 26 58 5 2200 ±20
SR1K20M474X 33 ±10 26 58 5 470 ±20
SR2K20M105X 33 ±10 26 58 10 1000 ±20
SR2K20M155X 33 ±10 26 58 10 1500 ±20
SR2K20M474X 33 ±10 26 58 10 470 ±20
SR6K20M105X 33 ±10 26 54 1 1000 ±20
SR1K30M155X 47 ±10 45 77 5 1500 ±20
SR6K35M105X 56 ±10 45 90 1 1000 ±20
SR6K35M474X 56 ±10 45 90 1 470 ±20
Temperature derating
Climatic category: 55/+125 °C
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 5 of 22Please read Cautions and warnings and
Important notes at the end of this document.
Dimensional drawing
Dimensions in mm
Type
SHCV
wmax hmax smax
SR1 ... 474X 7.3 7.8 3.7
SR1 ... 105X 7.3 7.8 3.7
SR1 ... 155X 7.3 7.8 3.7
SR1 ... 225X 7.3 7.8 4.1
SR2 ... 474X 7.8 9.0 3.6
SR2 ... 105X 7.8 9.0 4.1
SR2 ... 155X 7.8 9.0 4.1
SR2 ... 475X 7.8 9.0 4.1
SR6 ... 6.0 7.5 4.5
Delivery mode
Designation Taping mode Ordering code, last two digits
- Bulk B725*********00
G Taped on reel B725*********51
GA Taped in AMMO pack B725*********54
M14 Lead length 14 mm B725*********33
Standard delivery mode for SHCV types is bulk. Taped versions on reel, AMMO pack and special
lead length available upon request.
For further information on taping please contact EPCOS.
Packing units for:
Type Pieces
SR6 2000
SR1 / SR2 1000
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 6 of 22Please read Cautions and warnings and
Important notes at the end of this document.
Soldering instructions
Soldering
Components with wire leads such as leaded transient voltage/ RFI suppressors (SHCVs) can be
soldered using all conventional methods.
Recommended temperature profile in wave soldering
Storage
The SHCV type series should be soldered after shipment from EPCOS within the time specified:
24 months.
The parts are to be left in the original packing to avoid any soldering problems caused by oxidized
terminals. Storage temperature – 25 to 45 °C.
Max. relative humidity (without condensation): < 75% annual average,
< 95% on max. 30 days per annum.
Standards
IEC 60068-2-20
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 7 of 22Please read Cautions and warnings and
Important notes at the end of this document.
Typical characteristics
Capacitance change ∆C/C25 versus temperature T
Note:
The capacitance and the dissipation factor shall meet the specified values 1000 hours after the
last heat treatment above the curie temperature.
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 8 of 22Please read Cautions and warnings and
Important notes at the end of this document.
V/I characteristics
SR1S14B*
SR2S14B*
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 9 of 22Please read Cautions and warnings and
Important notes at the end of this document.
V/I characteristics
SR6K14*
SR1K20*
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 10 of 22Please read Cautions and warnings and
Important notes at the end of this document.
V/I characteristics
SR2K20*
SR6K20*
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 11 of 22Please read Cautions and warnings and
Important notes at the end of this document.
V/I characteristics
SR1K30*
SR6K35*
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 12 of 22Please read Cautions and warnings and
Important notes at the end of this document.
Derating curves
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
SHCV-SR1 ...
SHCV-SR2 ...
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 13 of 22Please read Cautions and warnings and
Important notes at the end of this document.
Derating curves
Maximum surge current Isurge,max = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", chapter 2.7.1
SR6K14 , SR6K20
SR6K35 ...
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 14 of 22Please read Cautions and warnings and
Important notes at the end of this document.
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
RSResistance per line
RS,typ Typical resistance per line
TAAmbient temperature
Top Operating temperature
Top,max Maximum operating temperature
Tstg Storage temperature
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 15 of 22Please read Cautions and warnings and
Important notes at the end of this document.
Symbol Term
trDuration 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
VVVaristor 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
∆VVTolerance of varistor voltage
WLD Maximum load dump energy
Wmax Maximum energy absorption (also termed transient energy)
αtyp Typical insertion loss
tan δDissipation factor
Lead spacing
*Maximum possible application conditions
All dimensions are given in mm.
The commas used in numerical values denote decimal points.
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 16 of 22Please read Cautions and warnings and
Important notes at the end of this document.
For CeraDiodes
CeraDiode Semiconductor diode
Cmax Maximum capacitance
Ctyp Typical capacitance
IBR IR, IT(Reverse) current @ breakdown voltage
Ileak IRM (Reverse) leakage current
IPP IP, IPP Current @ clamping voltage; peak pulse
current
PPP PPP Peak pulse power
Top Operating temperature
Tstg Storage temperature
VBR VBR (Reverse) breakdown voltage
VBR,min Minimum breakdown voltage
Vclamp Vcl, VCClamping voltage
Vclamp,max Maximum clamping voltage
VDC VRM, VRWM, VWM, VDC (Reverse) stand-off voltage, working
voltage, operating voltage
VDC,max Maximum DC operating voltage
VESD,air Air discharge ESD capability
VESD,contact Contact discharge ESD capability
Vleak VRM, VRWM, VWM, VDC (Reverse) voltage @ leakage current
- *) IFCurrent @ forward voltage
- *) IRM, IRM,max@VRM (Reverse) current @ maximum reverse
stand-off voltage, working voltage,
operating voltage
- *) VFForward voltage
*) Not applicable due to bidirectional characteristics of CeraDiodes.
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 17 of 22Please read Cautions and warnings and
Important notes at the end of this document.
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 fil-
ters, leaded transient voltage/ RFI suppressors (SHCV types)) for certain areas of application, in-
cluding recommendations about incorporation/design-in of these products into customer applica-
tions. 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 ap-
plications or less familiar with them than the customers themselves. For these reasons, it is al-
ways incumbent on the customer to check and decide whether the CTVS devices with the proper-
ties described in the product specification are suitable for use in a particular customer applica-
tion.
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.
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 18 of 22Please read Cautions and warnings and
Important notes at the end of this document.
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.
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 19 of 22Please read Cautions and warnings and
Important notes at the end of this document.
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
Leaded transient voltage/RFI suppressors (SHCVs)
SHCV series
Page 20 of 22Please read Cautions and warnings and
Important notes at the end of this document.
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 re-
quirements 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 incum-
bent on the customer to check and decide whether an EPCOS product with the properties de-
scribed 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 Ma-
terial Data Sheets on the Internet (www.epcos.com/material). Should you have any more de-
tailed 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 fore-
going for customer-specific products.
6. Unless otherwise agreed in individual contracts, all orders are subject to the current ver-
sion of the "General Terms of Delivery for Products and Services in the Electrical In-
dustry" published by the German Electrical and Electronics Industry Association
(ZVEI).
Important notes
Page 21 of 22
7. The trade names EPCOS, CeraDiode, CeraLink, CeraPad, CeraPlas, CSMP, CTVS,
DeltaCap, DigiSiMic, ExoCore, FilterCap, FormFit, LeaXield, MiniBlue, MiniCell, MKD, MKK,
MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, PowerHap, PQSine, PQvar,
SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV,
ThermoFuse, WindCap are trademarks registered or pending in Europe and in other coun-
tries. Further information will be found on the Internet at www.epcos.com/trademarks.
Important notes
Page 22 of 22
