SIOV metal oxide varistors
Block varistors, HighE series
Series/Type: B722*
Date: January 2018
© EPCOS AG 2018. 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.
Construction
Disk-shaped varistor element,
potted in plastic housing
Housing and potting flame-retardant to UL 94 V-0
Screw terminals M4 (SIOV-B32 40)
Screw terminals M5 (SIOV-B60 80)
Features
Heavy-duty varistors (surge current capability up to 100 kA)
Wide operating voltage range 75 1100 VRMS
SIOV-B40 also available without housing (LS40 series)
PSpice models
Approvals
UL
CSA (K130)
Delivery mode
Cardboard box
General technical data
Climatic category to IEC 60068-1 40/85/56
Operating temperature to CECC 42 000 40 ... + 85 °C
Storage temperature 40 ... +110 °C
Electric strength to CECC 42 000 2.5 kVRMS
Insulation resistance to CECC 42 000 10 M
Maximum torque for
B32 and B40 types 1.0 Nm
Maximum torque for
B60 and B80 types 2.5 Nm
Block varistors B722*
HighE series
Page 2 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Electrical specifications and ordering codes
Maximum ratings (TA=85°C)
Ordering code Type
SIOV-
VRMS
V
VDC
V
imax
(8/20 µs)
A
Wmax
(2 ms)
J
Pmax
W
VRMS = 75 V
B72240B0750K001 B40K75 75 100 25000 190 1.4
VRMS = 130 V
B72232B0131K001 B32K130 130 170 25000 210 1.2
B72240B0131K001 B40K130 130 170 40000 310 1.4
B72260B0131K001 B60K130 130 170 70000 490 1.6
B72280B0131K001 B80K130 130 170 100000 660 2.0
VRMS = 150 V
B72232B0151K001 B32K150 150 200 25000 240 1.2
B72240B0151K001 B40K150 150 200 40000 360 1.4
B72260B0151K001 B60K150 150 200 70000 570 1.6
B72280B0151K001 B80K150 150 200 100000 800 2.0
VRMS = 230 V
B72232B0231K001 B32K230 230 300 25000 300 1.2
B72240B0231K001 B40K230 230 300 40000 460 1.4
B72260B0231K001 B60K230 230 300 70000 730 1.6
B72280B0231K001 B80K230 230 300 100000 1200 2.0
VRMS = 250 V
B72232B0251K001 B32K250 250 320 25000 330 1.2
B72240B0251K001 B40K250 250 320 40000 490 1.4
B72260B0251K001 B60K250 250 320 70000 800 1.6
B72280B0251K001 B80K250 250 320 100000 1300 2.0
VRMS = 275 V
B72232B0271K001 B32K275 275 350 25000 360 1.2
B72240B0271K001 B40K275 275 350 40000 550 1.4
B72260B0271K001 B60K275 275 350 70000 860 1.6
B72280B0271K001 B80K275 275 350 100000 1400 2.0
VRMS = 320 V
B72232B0321K001 B32K320 320 420 25000 430 1.2
B72240B0321K001 B40K320 320 420 40000 640 1.4
B72260B0321K001 B60K320 320 420 70000 1000 1.6
B72280B0321K001 B80K320 320 420 100000 1600 2.0
Varistor elements without plastic housing (suitable for soldering) are available upon request.
Block varistors B722*
HighE series
Page 3 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Characteristics (TA=25°C)
Ordering code Vv
(1 mA)
V
Vv
(1 mA)
%
vc,max
(ic)
V
ic
A
Ctyp
(1 kHz)
pF
VRMS = 75 V
B72240B0750K001 120 ±10 220 300 11000
VRMS = 130 V
B72232B0131K001 205 ±10 340 200 4400
B72240B0131K001 205 ±10 340 300 5600
B72260B0131K001 205 ±10 340 500 15000
B72280B0131K001 205 ±10 340 800 28000
VRMS = 150 V
B72232B0151K001 240 ±10 395 200 3700
B72240B0151K001 240 ±10 395 300 4800
B72260B0151K001 240 ±10 395 500 12000
B72280B0151K001 240 ±10 395 800 23000
VRMS = 230 V
B72232B0231K001 360 ±10 595 200 2500
B72240B0231K001 360 ±10 595 300 3200
B72260B0231K001 360 ±10 595 500 7900
B72280B0231K001 360 ±10 595 800 16000
VRMS = 250 V
B72232B0251K001 390 ±10 650 200 2200
B72240B0251K001 390 ±10 650 300 2900
B72260B0251K001 390 ±10 650 500 7100
B72280B0251K001 390 ±10 650 800 14000
VRMS = 275 V
B72232B0271K001 430 ±10 710 200 2000
B72240B0271K001 430 ±10 710 300 2700
B72260B0271K001 430 ±10 710 500 6600
B72280B0271K001 430 ±10 710 800 13000
VRMS = 320 V
B72232B0321K001 510 ±10 840 200 1700
B72240B0321K001 510 ±10 840 300 2300
B72260B0321K001 510 ±10 840 500 5600
B72280B0321K001 510 ±10 840 800 11000
Varistor elements without plastic housing (suitable for soldering) are available upon request.
Block varistors B722*
HighE series
Page 4 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Electrical specifications and ordering codes
Maximum ratings (TA=85°C)
Ordering code Type
SIOV-
VRMS
V
VDC
V
imax
(8/20 µs)
A
Wmax
(2 ms)
J
Pmax
W
VRMS = 385 V
B72232B0381K001 B32K385 385 505 25000 550 1.2
B72240B0381K001 B40K385 385 505 40000 800 1.4
B72260B0381K001 B60K385 385 505 70000 1200 1.6
B72280B0381K001 B80K385 385 505 100000 2000 2.0
VRMS = 420 V
B72232B0421K001 B32K420 420 560 25000 600 1.2
B72240B0421K001 B40K420 420 560 40000 910 1.4
B72260B0421K001 B60K420 420 560 70000 1500 1.6
B72280B0421K001 B80K420 420 560 100000 2200 2.0
VRMS = 440 V
B72232B0441K001 B32K440 440 585 25000 630 1.2
B72240B0441K001 B40K440 440 585 40000 950 1.4
B72260B0441K001 B60K440 440 585 70000 1580 1.6
B72280B0441K001 B80K440 440 585 100000 2350 2.0
VRMS = 460 V
B72232B0461K001 B32K460 460 615 25000 660 1.2
B72240B0461K001 B40K460 460 615 40000 1000 1.4
B72260B0461K001 B60K460 460 615 70000 1650 1.6
B72280B0461K001 B80K460 460 615 100000 2500 2.0
VRMS = 550 V
B72232B0551K001 B32K550 550 745 25000 620 1.2
B72240B0551K001 B40K550 550 745 40000 960 1.4
B72260B0551K001 B60K550 550 745 70000 1500 1.6
B72280B0551K001 B80K550 550 745 100000 3100 2.0
VRMS = 680 V
B72232B0681K001 B32K680 680 895 25000 760 1.2
B72240B0681K001 B40K680 680 895 40000 1100 1.4
B72260B0681K001 B60K680 680 895 70000 1800 1.6
B72280B0681K001 B80K680 680 895 100000 3600 2.0
Varistor elements without plastic housing (suitable for soldering) are available upon request.
Block varistors B722*
HighE series
Page 5 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Characteristics (TA=25°C)
Ordering code Vv
(1 mA)
V
Vv
(1 mA)
%
vc,max
(ic)
V
ic
A
Ctyp
(1 kHz)
pF
VRMS = 385 V
B72232B0381K001 620 ±10 1025 200 1400
B72240B0381K001 620 ±10 1025 300 1900
B72260B0381K001 620 ±10 1025 500 4600
B72280B0381K001 620 ±10 1025 800 9000
VRMS = 420 V
B72232B0421K001 680 ±10 1120 200 1300
B72240B0421K001 680 ±10 1120 300 1800
B72260B0421K001 680 ±10 1120 500 4300
B72280B0421K001 680 ±10 1120 800 8500
VRMS = 440 V
B72232B0441K001 715 ±10 1180 200 1250
B72240B0441K001 715 ±10 1180 300 1700
B72260B0441K001 715 ±10 1180 500 4100
B72280B0441K001 715 ±10 1180 800 8100
VRMS = 460 V
B72232B0461K001 750 ±10 1240 200 1200
B72240B0461K001 750 ±10 1240 300 1600
B72260B0461K001 750 ±10 1240 500 3900
B72280B0461K001 750 ±10 1240 800 7700
VRMS = 550 V
B72232B0551K001 910 ±10 1500 200 1000
B72240B0551K001 910 ±10 1500 300 1400
B72260B0551K001 910 ±10 1500 500 3300
B72280B0551K001 910 ±10 1500 800 6500
VRMS = 680 V
B72232B0681K001 1100 ±10 1815 200 830
B72240B0681K001 1100 ±10 1815 300 1100
B72260B0681K001 1100 ±10 1815 500 2600
B72280B0681K001 1100 ±10 1815 800 5200
Varistor elements without plastic housing (suitable for soldering) are available upon request.
Block varistors B722*
HighE series
Page 6 of 23Please read Cautions and warnings and
Important notes at the end of this document.
1) Operating voltage differs from type designation
Electrical specifications and ordering codes
Maximum ratings (TA=85°C)
Ordering code Type
SIOV-
VRMS
V
VDC
V
imax
(8/20 µs)
A
Wmax
(2 ms)
J
Pmax
W
VRMS = 750 V
B72232B0751K001 B32K750 750 970 25000 800 1.2
B72240B0751K001 B40K750 750 970 40000 1200 1.4
B72260B0751K001 B60K750 750 970 70000 2000 1.6
B72280B0751K001 B80K750 750 970 100000 4000 2.0
VRMS = 1100 V
B72260B0102K001 B60K10001) 1100 1465 70000 3000 1.6
B72280B0112K001 B80K1100 1100 1465 100000 6000 2.0
Characteristics (TA=25°C)
Ordering code Vv
(1 mA)
V
Vv
(1 mA)
%
vc,max
(ic)
V
ic
A
Ctyp
(1 kHz)
pF
VRMS = 750 V
B72232B0751K001 1200 ±10 2000 200 800
B72240B0751K001 1200 ±10 2000 300 1000
B72260B0751K001 1200 ±10 2000 500 2400
B72280B0751K001 1200 ±10 2000 800 4800
VRMS = 1100 V
B72260B0102K001 1800 ±10 2970 500 1600
B72280B0112K001 1800 ±10 2970 800 3200
Varistor elements without plastic housing (suitable for soldering) are available upon request.
Block varistors B722*
HighE series
Page 7 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Dimensional drawings
SIOV-B32/-B40
SIOV-B60
SIOV-B80
Weight
Nominal diameter
mm
VRMS
V
Weight
g
32 130 ... 750 45
40 75 ... 750 50
60 130 ... 1100 250
80 130 ... 1100 650
Dimensions in mm
Block varistors B722*
HighE series
Page 8 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Reliability data
Test Test methods/conditions Requirement
Varistor voltage The voltage between two terminals with
the specified measuring current applied
is called VV(1 mADC @ 0.2 ... 2 s).
To meet the specified value
Clamping voltage The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
To meet the specified value
Max. DC operating
voltage
The maximum allowable DC operating
voltage VDC at UCT +5/–0 °C is applied
for 1000 ±48 h.
The leakage current Ileak (t) during test is
recorded.
Then the specimen shall be stored at
room temperature and normal humidity
for 1 to 2 h.
Thereafter, the change of VVshall be
measured.
Ileak (t = 1000 h) Ileak (t = 0 h)
|V/V (1 mA)| 10%
Surge current derating,
8/20 µs
10 surge currents (8/20 µs), unipolar,
interval 60 s, amplitude corresponding
to derating curve for 10 impulses at
20 µs
|V/V (1 mA)| 10%
(measured in direction of
surge current)
No visible damage
Fast temperature cycling IEC 60068-2-14, test Na, LCT/UCT,
dwell time 120 min, 5 cycles
|V/V (1 mA)| 10%
No visible damage
Damp heat, steady state IEC 60068-2-78
The specimen shall be subjected to
40 ±2°C, 90 to 95% r. H. for 56 ±2 days
with 10% of the maximum continuous
DC operating voltage VDC.Then stored
at room temperature and normal
humidity for 1 to 2 h.
Thereafter, the change of VVshall be
measured.
|V/V (1 mA)| 10%
Note:
UCT = Upper category temperature
LCT = Lower category temperature
Block varistors B722*
HighE series
Page 9 of 23Please read Cautions and warnings and
Important notes at the end of this document.
v/i characteristics
v = f (i) for explanation of the characteristics refer to "General technical information", chapter 1.6.3
A = Leakage current, B = Protection level } for worst-case varistor tolerances
SIOV-B32K130 ... K750
Block varistors B722*
HighE series
Page 10 of 23Please read Cautions and warnings and
Important notes at the end of this document.
v/i characteristics
v = f (i) for explanation of the characteristics refer to "General technical information", chapter 1.6.3
A = Leakage current, B = Protection level } for worst-case varistor tolerances
SIOV-B40K75 ... K750
Block varistors B722*
HighE series
Page 11 of 23Please read Cautions and warnings and
Important notes at the end of this document.
v/i characteristics
v = f (i) for explanation of the characteristics refer to "General technical information", chapter 1.6.3
A = Leakage current, B = Protection level } for worst-case varistor tolerances
SIOV-B60K130 ... K1000
Block varistors B722*
HighE series
Page 12 of 23Please read Cautions and warnings and
Important notes at the end of this document.
v/i characteristics
v = f (i) for explanation of the characteristics refer to "General technical information", chapter 1.6.3
A = Leakage current, B = Protection level } for worst-case varistor tolerances
SIOV-B80K130 ... K1100
Block varistors B722*
HighE series
Page 13 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Derating curves
Maximum surge current imax = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", section 1.8.1
SIOV-B32K130 ... K150 SIOV-B40K75
SIOV-B32K230 ... K460
Block varistors B722*
HighE series
Page 14 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Derating curves
Maximum surge current imax = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", section 1.8.1
SIOV-B32K550 ... K750
SIOV-B40K130 ... K150
Block varistors B722*
HighE series
Page 15 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Derating curves
Maximum surge current imax = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", section 1.8.1
SIOV-B40K230 ... K460
SIOV-B40K550 ... K750
Block varistors B722*
HighE series
Page 16 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Derating curves
Maximum surge current imax = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", section 1.8.1
SIOV-B60K130 ... K150
SIOV-B60K230 ... K460
Block varistors B722*
HighE series
Page 17 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Derating curves
Maximum surge current imax = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", section 1.8.1
SIOV-B60K550 ... K1000
SIOV-B80K130 ... K1100
Block varistors B722*
HighE series
Page 18 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Cautions and warnings
General
1. EPCOS metal oxide varistors are designed for specific applications and should not be used
for purposes not identified in our specifications, application notes and data books unless oth-
erwise agreed with EPCOS during the design-in-phase.
2. Ensure suitability of SIOVs through reliability testing during the design-in phase. SIOVs
should be evaluated taking into consideration worst-case conditions.
3. For applications of SIOVs in line-to-ground circuits based on various international and local
standards there are restrictions existing or additional safety measures required.
Storage
1. Store SIOVs only in original packaging. Do not open the package prior to processing.
2. Recommended storage conditions in original packaging:
Storage temperature: 25 °C ... +45 °C,
Relative humidity: <75% annual average,
<95% on maximum 30 days a year.
Dew precipitation: is to be avoided.
3. Avoid contamination of an SIOV's during storage, handling and processing.
4. Avoid storage of SIOVs in harmful environments that can affect the function during long-term
operation (examples given under operation precautions).
5. The SIOV type series should be soldered after shipment from EPCOS within the time speci-
fied:
SIOV-S, -Q, -LS, -B, -SNF 24 months
ETFV/ T series, -CU 12 months.
Handling
1. SIOVs must not be dropped.
2. Components must not be touched with bare hands. Gloves are recommended.
3. Avoid contamination of the surface of SIOV electrodes during handling, be careful of the
sharp edge of SIOV electrodes.
Soldering (where applicable)
1. Use rosin-type flux or non-activated flux.
2. Insufficient preheating may cause ceramic cracks.
3. Rapid cooling by dipping in solvent is not recommended.
4. Complete removal of flux is recommended.
5. Temperatures of all preheat stages and the solder bath must be strictly controlled especially
for T series (T14 and T20).
Block varistors B722*
HighE series
Page 19 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Mounting
1. Potting, sealing or adhesive compounds can produce chemical reactions in the SIOV ceramic
that will degrade the component’s electrical characteristics.
2. Overloading SIOVs may result in ruptured packages and expulsion of hot materials. For this
reason SIOVs should be physically shielded from adjacent components.
Operation
1. Use SIOVs only within the specified temperature operating range.
2. Use SIOVs only within the specified voltage and current ranges.
3. Environmental conditions must not harm SIOVs. Use SIOVs only in normal atmospheric con-
ditions. Avoid use in deoxidizing gases (chlorine gas, hydrogen sulfide gas, ammonia gas,
sulfuric acid gas etc), corrosive agents, humid or salty conditions.Contact with any liquids and
solvents should be prevented.
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
Block varistors B722*
HighE series
Page 20 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Symbols and terms
Symbol Term
C Capacitance
Ctyp Typical capacitance
i Current
icCurrent at which Vc, max is measured
Ileak Leakage current
imax Maximum surge current (also termed peak current)
Imax Maximum discharge current
InNominal discharge current to UL 1449
LCT Lower category temperature
Ltyp Typical inductance
Pmax Maximum average power dissipation
Rins Insulation resistance
Rmin Minimum resistance
TAAmbient temperature
trDuration of equivalent rectangular wave
UCT Upper category temperature
v Voltage
Vclamp Clamping voltage
vc, max Maximum clamping voltage at specified current ic
VDC DC operating voltage
Vjump Maximum jump start voltage
vmax Maximum voltage
Vop Operating voltage
VRMS AC operating voltage, root-mean-square value
VRMS, op, max Root-mean-square value of max. DC operating voltage incl. ripple current
Vsurge Super imposed surge voltage
VVVaristor voltage
VVTolerance of varistor voltage
WLD Maximum load dump
Wmax Maximum energy absorption
Lead spacing
All dimensions are given in mm.
The commas used in numerical values denote decimal points.
Block varistors B722*
HighE series
Page 21 of 23Please read Cautions and warnings and
Important notes at the end of this document.
Page 22 of 23
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 we are 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 a 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 life-saving 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.tdk-electronics.tdk.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 our General Terms
and Conditions of Supply.
7. Our manufacturing sites serving the automotive business apply the IATF 16949 standard.
The IATF certifications confirm our compliance with requirements regarding the quality
management system in the automotive industry. Referring to customer requirements and
customer specific requirements (“CSR”) TDK always has and will continue to have the policy of
respecting individual agreements. Even if IATF 16949 may appear to support the acceptance of
unilateral requirements, we hereby like to emphasize that only requirements mutually agreed
upon can and will be implemented in our Quality Management System. For clarification
purposes we like to point out that obligations from IATF 16949 shall only become legally binding if
individually agreed upon.
Page 23 of 23
Important notes
8. The trade names EPCOS, CeraCharge, 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 countries. Further
information will be found on the Internet at www.tdk-electronics.tdk.com/trademarks.
Release 2018-10