Metal oxide varistor
SMD Varistors, Monolithic (CU)
Series/Type: CU4032K230G2K1
Ordering code: B72660M0231K093
Date: 2007-12-03
Version: 1
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Identification/Classification 1
(header 1 + top left header bar):
Metal oxide varistor
Identification/Classification 2
(header 2 + bottom left header bar):
SMD Varistors, Monolithic (CU)
Ordering code: (top right header bar) B72660M0231K093
Series/Type: (top right header bar) CU4032K230G2K1
Preliminary data (optional):
(if necessary)
Department: KB VS PE
Date: 2007-12-03
Version: 1
Prepared by: Dr. Kofler
Release signed by: Dr. Engel
Release signed QS: Hr. Schlauer
Modifications/Remarks: New form (old edition: a)
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 2 of 12
Important notes at the end of this document.
Designation system
CU = chip encapsulated
4032 = dimensions of the device 40 x 32 (length x width in 1/100 inch)
K = tolerance of the varistor voltage (±10%)
230 = max. RMS operating voltage
G2 = taped version, blister tape, 13" reel (1000 pcs. /reel)
K1 = sealed type
Electrical data
Max. operating voltage
RMS voltage VRMS = 230 V
DC voltage VDC = 300 V
Varistor voltage (@ 1 mA, 25 °C) VV = 324…396V
Max. clamping voltage (@ 10 A) VC = 595 V
Max. average power dissipation Pmax = 0.25 W
Max. surge current (8/20 µs) Îmax = 1 x 1200 A
Max. energy absorption (2 ms) Emax = 1 x 17 J
Capacitance (@ 1 kHz, 1 V, 25 °C; typical) C = 115 pF
Response time < 0.5 ns
Operating temperature –40 ... +85 °C
Storage temperature (mounted parts) –40 ... +125 °C
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 3 of 12
Important notes at the end of this document.
v/i-characteristic
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
10
4
A
i
50
5000
v
60
80
100
200
400
600
800
1000
2000
4000
V
VAR9109A
Derating field
1 x
2 x
10 x
10^2 x
10^3 x
10^4 x
10^5 x
10^6 x
inf..
0,1
1
10
100
1000
10000
10 100 1000 10000
t r [µs]
t
i
r
max.
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 4 of 12
Important notes at the end of this document.
Temperature derating
100
0
10
20
30
40
50
60
70
80
90
%
-55 °C
A
mbient temperature
Max. current, energy, operating voltage and average power
dissipation depending on ambient temperature
70 80 90 100 110 120 130 140 150
Dimensional drawing in mm
L
H
B
AL
X
l = 10.2 ± 0.3
b = 8.0 ± 0.3
h = 4.5 ± 0.3
AL = 1.5 ± 0.3
X = 0.3max
Recommended solder pad layout
A
A
D
CB
B
A = 3.5 mm
B = 2.8 mm
C = 6.5 mm
D = 12.1 mm
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 5 of 12
Important notes at the end of this document.
Recommended soldering temperature profiles
Reflow soldering temperature profile
TPT0892-3-E
T
25
Smin
t
S
t 25 ˚C to peak
Preheat Ramp-down
Time
L
Critical zone
T
Temperature
T
L
T
p
Ramp-up
Smax
t
L
T
t
p
to T
p
Profile feature Sn-Pb eutectic assembly Pb-free assembly
Average ramp-up rate (TSmax to Tp) 3 °C/ second max. 3 °C/ second max.
Preheat
- Temperature min (TSmin)
- Temperature max (TSmax)
- Time (tSmin to tSmax)
100 °C
150 °C
60 … 120 seconds
150 °C
200 °C
60 … 180 seconds
Time maintained above
- Temperature min (TL)
- Time (tL)
183 °C
60 … 150 seconds
217 °C
60 … 150 seconds
Peak classification temperature
(Tp)
220 °C … 240 °C 240 °C … 260 °C
Time within 5 °C of actual peak
temperature (tp)
10 … 30 seconds 20 … 40 seconds
Ramp-down rate 6 °C/ second max. 6 °C/ second max.
Time 25 °C to peak temperature 6 minutes max. 8 minutes max.
Notes: All temperatures refer to topside of the package, measured on the package body surface.
Max. number of reflow cycles: 3
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 6 of 12
Important notes at the end of this document.
Wave soldering temperature profile
Temperature characteristic at component terminal with dual-wave soldering
˚C
300
250
200
150
100
50
Temperature
Time
KKE0144-J-E
2 K/s
approx. 200 K/s
5 K/s
1st wave 2nd wave
2 K/s
235 ˚C ... 260 ˚C
Forced
Limit curves
Normal curve
10 s
100 ˚C ... 130 ˚C
s 250200150100500
0
cooling
Soldering guidelines
The usage of mild, non-activated fluxes for soldering is recommended, as well as proper
cleaning of the PCB.
The components are suitable for reflow soldering to JEDEC J-STD-020C.
Storage condition
As far as possible, the components should be employed within 24 months after delivery
from EPCOS.
They should be left in their original packings to avoid soldering problems due to oxidized
contacts.
Storage temperature: − 25 up to + 45°C.
Relative humidity: < 75 % annual average, < 95 % on max. 30 days in a year.
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 7 of 12
Important notes at the end of this document.
Taping and packaging
Tape and reel packing according to IEC 60286-3
Tape material: Blister
Dimensions and tolerances
Definition Symbol Dimension
[mm]
Tolerance
[mm]
Compartment width A0 8.6 ±0.2
Compartment length B0 10.6 ±0.2
Compartment height K0 5.0 max.
Sprocket hole diameter D0 1.5 +0.1 /-0
Compartment hole diameter D1 1.5 min.
Sprocket hole pitch P0 4.0
±0.1 1)
Distance center hole to center compartment P2 2.0 ±0.05
Pitch of the component compartments P1 12.0 ±0.1
Tape width W 16.0 ±0.3
Distance edge to center of hole E 1.75 ±0.1
Distance center hole to center compartment F 7.5 ±0.05
Distance compartment to edge G 0.75 min.
Overall thickness T2 5.5 max.
Thickness tape T 0.3 max.
1) ≤ ±0.2 mm over any 10 pitches
Package: 16mm tape
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 8 of 12
Important notes at the end of this document.
Packing
Packing material: Plastic
Reel dimensions
Packing unit: 1000 pcs. / reel
KKE0058-I
W
1
2
W
A
13±0.2
Direction of unreeling
+2
0
ø60
_
40 min.
empty cavities
25 min.
empty cavities
300 mm
cover tape
Leader
Tape end (trailer)
Dinition Symbol Dimension
[mm]
Tolerance
[mm]
Reel diameter A 330 +0 / -3
Reel width (inside) W1 16.4 +1.5 /-0
Reel width (outside) W2 22.4 max.
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 9 of 12
Important notes at the end of this document.
Cautions and warnings
General
Some parts of this publication contain statements about the suitability of our varistors and CeraDiodes
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 varistors and/or CeraDiodes in the particular areas. We nevertheless
expressly point out that such statements cannot be regarded as binding statements about the
suitability of our varistors and/or CeraDiodes 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 varistors and/or CeraDiodes with the properties described in the product specification are suitable
for use in a particular customer application.
Do not use EPCOS varistors and CeraDiodes for purposes not identified in our specifications,
application notes and data books.
Ensure the suitability of a varistor or CeraDiode in particular by testing it for reliability during
design-in. Always evaluate a varistor or CeraDiode under worst-case conditions.
Pay special attention to the reliability of varistors and CeraDiodes intended for use in safety-
critical applications (e.g. medical equipment, automotive, spacecraft, nuclear power plant).
Design notes
Always connect a varistor or CeraDiode in parallel with the electronic circuit to be protected.
Consider maximum rated power dissipation if a varistor or CeraDiode 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 varistor or CeraDiode. In extreme cases a
varistor or CeraDiode 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 varistors from the AUTO series
in safety-relevant applications.
Specified values only apply to varistors and CeraDiodes that have not been subject to prior
electrical, mechanical or thermal damage. The use of varistors and CeraDiodes in line-to-ground
applications is therefore not advisable, and it is only allowed together with safety
countermeasures like thermal fuses.
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 10 of 12
Important notes at the end of this document.
Storage
Only store varistors in their original packaging. Do not open the package before storage.
Storage conditions in original packaging: temperature -25 to +45°C, relative humidity ≤75% annual
mean, maximum 95%, dew precipitation is inadmissible.
Do not store varistors or CeraDiodes where they are exposed to heat or direct sunlight. Otherwise
the packaging material may be deformed or varistors and CeraDiodes may stick together, causing
problems during mounting.
Avoid contamination of the varistor or CeraDiode surface during storage, handling and
processing.
Avoid storing varistors or CeraDiodes in harmful environments where they are exposed to
corrosive gases for example (SOx, Cl).
Use varistors and CeraDiodes as soon as possible after opening factory seals such as polyvinyl-
sealed packages.
Solder varistors after shipment from EPCOS within the time specified:
- Varistors and CeraDiodes with Ni barrier termination, 12 months
- Varistors and CeraDiodes with AgPd termination, 6 months
- SHCV and CU series, 24 months
Handling
Do not drop varistors and CeraDiodes and allow them to be chipped.
Do not touch varistors and CeraDiodes with your bare hands - gloves are recommended.
Avoid contamination of the varistor surface during handling.
Mounting
When varistors or CeraDiodes are encapsulated with sealing material or overmolded with plastic
material, be sure to observe the precautions in “Mounting instructions”, “Sealing, potting and
overmolding”.
Make sure an electrode is not scratched before, during or after the mounting process.
Make sure contacts and housings used for assembly with varistors and CeraDiodes are clean
before mounting.
The surface temperature of an operating varistor or CeraDiode can be higher. Ensure that
adjacent components are placed at a sufficient distance from a varistor to allow proper cooling.
Avoid contamination of the varistor or CeraDiode surface during processing.
Only varistors with an Ni barrier termination are approved for lead-free soldering.
Metal oxide varistor B72660M0231K093
SMD Varistors, Monolithic (CU) CU4032K230G2K1
KB VS PE 2007-12-03
Please read Cautions and warnings and Page 11 of 12
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.
Conductive adhesive gluing
Varistors with an AgPd termination are approved for conductive adhesive gluing only.
Operation
Use varistors and CeraDiodes only within the specified operating temperature range.
Use varistors and CeraDiodes only within specified voltage and current ranges.
Environmental conditions must not harm a varistor or CeraDiode. Only use them in normal
atmospheric conditions. Reducing the atmosphere (e.g. hydrogen or nitrogen atmosphere) is
prohibited.
Prevent a varistor from contacting liquids and solvents. Make sure that no water enters a varistor
(e.g. through plug terminals).
Avoid dewing and condensation.
EPCOS varistors and CeraDiodes are designed for indoor applications. Under all circumstances
avoid exposure to:
- direct sunlight
- rain or condensation
- steam, saline spray
- corrosive gases
- atmosphere with reduced oxygen content
EPCOS varistors and CeraDiodes are not suitable for switching applications or voltage
stabilization where static power dissipation is required.
Varistors are designed for ESD protection and transient suppression. CeraDiodes are designed
for ESD protection only.
This listing does not claim to be complete, it merely reflects our experience.
Important notes
Page 12 of 12
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 passive 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 a passive 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 a passive 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.
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).
7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CSSP, MiniBlue, MKK, MLSC, MotorCap,
PCC, PhaseCap, PhaseMod, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SIMID,
SineFormer, SIOV, SIP5D, SIP5K, 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.
