ÒZNR
®
Ó Transient/Surge Absorbers,
ÒSeries WÓ (Type D)
VDE Recognized
ÒZNR
®
Ó Transient/Surge Absorbers
Series:
Type:
W
D
s
Featurest
q
Series W, Type D is recognized ZNR Transient
Surge absorbers according to CECC by VDE.
q
Series W, Type D can apply to equipment which
need to have CE Marking, conform to EU Directive
(Machinery, Electromagnetic Compatibility and Low
Voltage Directive etc.).
q
Series W, Type D fit Surge immunity test
(IEC1000-4-5/EN61000-4-5 etc.).
s
Related Standard and Certification Number
Related Standard
Title
Certification Number
VDE/CECC42201
SURGE SUPPRESSION VARISTORS
5912
s
Recommended Applications
q
Surge protection in equipment which need to have
CE Marking.
s
Explanation of Part Numbers
(Bulk)
E
R
Z
W
Element Size
Lead Configuration
Nominal Varistor Voltage
∗
V
9 Series' standard products are taping style.
(Taping)
E
R
Z
W
Taping/Packaging
Element Size
Lead Configuration
Nominal Varistor Voltage
s
Precautions for Handling
(See page 36 to 38)
Ð EZ34 Ð
ÒZNR
®
Ó Transient/Surge Absorbers,
ÒSeries WÓ (Type D)
s
Rating and Charcteristics (An outline)
Varistor
Part Number
Voltage
V1mA (V)
V
ERZW11D820
ERZW11D101
ERZW11D121
ERZW11D151
ERZW11D201
ERZW11D221
ERZW11D241
ERZW11D271
ERZW11D331
ERZW11D361
ERZW11D391
ERZW11D431
ERZW11D471
ERZW11D511
ERZW11D621
ERZW11D681
ERZW11D751
ERZW11D821
ERZW11D911
ERZW11D102
ERZW11D112
ERZW11D182
82 (
100 (
74Ð
90)
90Ð 110)
MaximumAllowable
Voltage
ACrms (V) DC (V)
50
60
70
95
130
140
150
175
210
230
250
275
300
320
385
420
460
510
550
625
680
1000
20:V
100A
ClampingVoltage
VV
(V) (max.)
Element Size Code
11
05
145
175
210
260
355
380
415
475
570
620
675
745
810
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
07,09 10,14,20
135
165
200
250
340
360
395
455
545
595
650
710
775
845
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
135
165
200
250
340
360
395
455
545
595
650
710
775
845
1025
1120
1240
1355
1500
1650
1815
2970
05
800
800
800
800
800
800
800
800
800
800
800
800
800
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Maximum Peak Current (A)
at. 8/20µs, 1time
Element Size Code
11
07
09
10
14
20
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
1750 3000 3500 6000 10000
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
3500 5000
3500 5000
3500 5000
3500 5000
3500 5000
3500 5000
3500 5000
3500 5000
7500
7500
7500
7500
7500
7500
7500
7500
65
85
100
125
170
180
200
225
270
300
320
350
385
410
505
560
615
670
745
825
895
1465
120 ( 108Ð 132)
150 ( 135Ð 165)
200 ( 185Ð 225)
220 ( 198Ð 242)
240 ( 216Ð 264)
270 ( 247Ð 303)
330 ( 297Ð 363)
360 ( 324Ð 396)
390 ( 351Ð 429)
430 ( 387Ð 473)
470 ( 423Ð 517)
510 ( 459Ð 561)
620 ( 558Ð 682)
680 ( 612Ð 748)
750 ( 675Ð 825)
820 ( 738Ð 902)
910 ( 819Ð 1001)
1000 ( 900Ð 1100)
1100 ( 990Ð 1210)
1800 ( 1700Ð 1980)
14:V
50A
11:
Element Size Code
V
Element size code 05:V
0.1mA
(V)
VV
05:V
5A
07:V
10A
09:V
25A
10:V
25A
s
Detail Specification
Detail specifications of Ratings and Characteristics,
Dimensions, Lead Style, Taping etc. are the same of
Series V.
See page 15 to 28 as substitute Part Number of W
Series for Part Number of V Series as follows.
Part Number of W Series Part Number of V Series
ERZW
111111
C
ERZV
111111
s
Notes
q
VDE recognized ÒZNR
®
Ó Transient/Surge Absorbers
(Series W, Type D) are order production.
q
Ordering unit quantity is 1000 pcs per part number.
(500 pcs for ERZW20D182)
Ð EZ35 Ð
ÒZNRÓ Transient/Surge Absorbors,
ÒSeries VÓ, (Type D), ÒSeries WÓ, (Type D), Type CF/Type SF
ÒZNR
®
Ó Transient/Surge Absorbers, Series V, Type D
ÒZNR
®
Ó Transient/Surge Absorbers, Series W, Type D
ÒZNR
®
Ó Transient/Surge Absorbers, Type CF and SF (SMD)
Precautions for Handling
The ÒZNRÓ Transient/Surge Absorbers (hereafter referred to as ÒThe ZNR VaristorsÓ) may fail in a short-circuit
mode or in an open-circuit mode, when subjected to severe conditions of electrical, environmental and/or me-
chanical stresses beyond their specified ÒRatingsÓ and specified ÒConditionsÓ, resulting in burnout, flaming or
glowing in the worst case.
Following Ò Precautions for SafetyÓ and ÒApplication NotesÓ shall be taken in your major consideration. If you
have a question about the ÒPrecautions for HandlingÓ, please contact our engineering section or factory.
1.
Precautions for Safety
1.1 Operating Conditions
1.1.1
The ZNR Varistors shall not be operated beyond
the specified ÒRatingsÓ and ÒEnvironmental
ConditionsÓ in the Catalog or the Specifications to
prevent them from deterioration, breakdown, flaming
or glowing.
q
The ZNR Varistors shall not be operated exceeding
the specified ÒMaximum Allowable VoltageÓ in the
Catalog or the Specification.
q
The ZNR Varistors shall not be subjected to
energy levels above their specified ÒMaximum
Energy RatingsÓ in the Catalog or the Specifications.
q
In case of application to repeated surge/
overvoltages, the ZNR Varistors shall not be
subjected to surge currents and energy levels
above the specified maximum ratings in ÒImpulse
Life RatingÓ in the Catalog or the Specifications.
q
When surge/overvoltages are intermittently
applied to the ZNR Varistors with short durations,
the devices shall not be operated beyond the
specified ÒRated PowerÓ in the Catalog or the
Specifications.
q
The ZNR Varistors shall not be operated beyond
the specified ÒOperating Temperature RangeÓ in
the Catalog or the Specifications.
q
It is recommended that the ZNR Varistors, if not
fused, shall be located away from other
combustibe components.
1.1.2
The ZNR Varistor shall be operated correctly
under following conditions to prevent Varistors from
causing mechanical damages and ruptures and to
protect human from serious injuries;
q
The ZNR Varistors shall not be operated
exceeding the specified ÒMaximum Allowable
Voltage RatingsÓ in the Catalog.
q
The ZNR Varistors shall not be operated beyond
the ÒMaximum Peak Current RatingsÓ in the
Catalog.
q
Some safety countermeasure such as a
protective case covering the Varistor is
recommended, if necessary.
1.1. 3
When the ZNR Varistors are applied to between
a live part and a metallic chassis of equipment, fol-
lowing safety countermeasures shall be taken to
protect human from electric shock.
A) The metallic chassis shall be earthed to the
ground.
B) The live part shall be equipped with a protective
cover for preventing electric shock.
2.Application Notes
2.1 Protective Devices for Varistors
2.1.1
The ZNR Varistors shall be protected from
serious accidents due to unexpected physical
phenomenor by following safety countermeasures.
q
In case of ÒAcross-the Line UseÓ, the ZNR
Varistors shall be protected by connecting a
ground fault circuit interrupter of fusing in series
to the devices. (See Table 1)
q
In case of ÒLine to Ground UseÓ, the short-circuit
of the Varistor may not blow the current type
fuse due to the grounding resistance (between
Line and Ground), which may cause flaming or
burnout of the devices in the worst case.
Following safety countermeasures (A or B) are
recommended;
A) Connecting a Òleakage current circuit breakerÓ in
series to the Varistor to be protected. (See Table 1)
B) Use current type fuses and a thermal type fuse
which are thermally coupled each others. (See
Table 1)
Ð EZ36 Ð
ÒZNRÓ Transient/Surge Absorbors,
ÒSeries VÓ, (Type D), ÒSeries WÓ, (Type D), Type CF/Type SF
Table 1.
(Line Protection)
Across-the-Line/Line to Line Protection
DC
AC Single phase
Line to Line and Line to Ground Protection
DC
AC Single phase
Connections
AC three phase
AC three phase
Application Examples
Selection Examples
Across the Line Use/Line to Line
ZNR
Nominal
Line Voltage
AC 100 V
ZNR1
AC 120 V
AC 200 V
AC 220 V
AC 240 V
AC 380 V
Part Number of ZNR
Type D
Type CF/SF
ERZ
@
11D201
ERZoo1MK201
ERZ
@
11D221
ERZoo1MK221
ERZ
@
11D241
ERZoo1MK241
ERZ
@
11D271
V
ERZoo1MK271
V
ERZ
@
11D241
ERZoo1MK241
ERZ
@
11D271
ERZoo1MK271
ERZ
@
11D331
V
ÑÑ
ERZ
@
11D471
ERZoo1MK471
ERZ
@
11D471
ERZoo1MK471
ERZ
@
11D511
ÑÑ
ERZ
@
D821
ÑÑ
ZNR
Line to Ground Use
Nominal
Line Voltage
AC 100 V
AC 220 V
Part Number of ZNR
Type D
Type CF/SF
ERZ
@
11D471
ERZoo1MK471
ERZ
@
11D511
ÑÑ
VV
ERZ
@
D821
or
ÑÑ
higher Varistor Voltage
ERZ
@
D182
VVV
ÑÑ
ERZ
@
11D511
ÑÑ
VV
ERZ
@
D821
or
ÑÑ
higher Varistor Voltage
ERZ
@
D182
VVV
ÑÑ
VV
ERZ
@
D112
or
ÑÑ
higher Varistor Voltage
ERZ
@
D182
VVV
ÑÑ
ZNR2
ZNR3
ZNR4
AC 230 V
AC 240 V
AC 380 V
Notes:
@
: ÒVÓ for Series V and ÒWÓ for Series W
1.
2 .
11:
Element size; Ò05Ó, Ò07Ó, Ò09Ó, Ò10Ó, Ò14Ó, or Ò20Ó
: Element size; Ò10Ó, Ò14Ó or Ò20Ó
3..
4.
oo:
ÒCFÓ for Type CF or ÒSFÓ for Type SF
2.2 Circuit Design 1
(Selection of Varistor Voltage Rating)
2.2.1 General Precautions
In selection of Varistor Voltage Ratings for line
protection, following general precautions shall be
taken in your consideration;
(1)Maximum operating voltage shall be lower than
the specified ÒMaximum Allowable VoltageÓ of
the Varistor applied.
(2)Some reasonable margin is required against
fluctuation of the primary AC line Voltage where
the Varistor is applied for preventing mechanical
and/or electrical failures of the device.
2.2.2 Across-the-Line Use
(Line to Line surge protection)
q
Select the ZNR Varistors recommended in Table 1.
Notes:
Because the primary line voltage temporarily
rises due to load unbalance of separately
wired loads, short circuit between the live
line and the nutral line or LC resonance at
switching for a capacitive load, ZNR Varistors
with
V
are recommended for AC120 V or
240 V applications. (See Table 1)
2.2.3 Line to Ground Use
(Line to Ground Surge protection)
q
Select the ZNR Varistors recommended in Table 1.
Notes:
When 500 V insulation resistance test of the
circuits employing ZNR Varistor is conducted,
the ZNR Varistor shall be removed after
getting approval from the customer, or the
ZNR Varistor
V V
with the Maximum Allowable
Voltage exceeding to the test voltage shall be
applied. (See Table 1)
When AC1000 V or 1200 V dielectric with
standing test is conducted, ZNR Varistors
shall be removed after getting approval from
the customer according to the relevant
regulations, or ZNR Varistor
V V V
with the
Maximum Allowable Voltage exceeding to the
test voltage shall be applied. (See Table 1)
Ð EZ37 Ð
ÒZNRÓ Transient/Surge Absorbors,
ÒSeries VÓ, (Type D), ÒSeries WÓ, (Type D), Type CF/Type SF
2.3 Circuit Design 2 (Fusing Varistors)
2.3.1 Fusing The ZNR Varistors
q
For Varistor protection, it is recommended to
select suitable fuses in Table 2.
Table 2.
Part No.
Recommended
Fuse
V
Ratings
Part No.
Recommended
Fuse
V
Ratings
ERZV05D111
3 A max.
ERZV07D111
5 A max.
ERZV09D111
ERZV10D111
7 A max.
ERZV14D111
10 A max.
ERZV20D111
10 A max.
q
The recommended fuse locations are shown in
Table 1.
ERZCF1M111 ERZSF1MK111
3 A max.
5 A max.
Notes:
V
The voltage rating of fuse shall be appropriate to the circuit
applied.
VV
In application to CSA Safety Standard, the rating of applicable
fuse shall conform to CSA class 2221 01.
2.3.2
When a line current of equipment is higher than
the recommended current rating of the fuse in
Table 2, the location of the fuse shall be arranged
according to Fig 2.
Fig. 2 Alternative Fuse Location/placement
for Varistor Protection
2.4 Environmental Conditions
(1)The ZNR Varistors shall not be exposed
outdoors, because of being designed for indoors
use.
(2)The ZNR Varistors shall not be operated beyond
the Specified Operating Temperature Range and
shall not be exposed to direct sunlight and
heating part of equipment.
(3)The ZNR Varistors shall not be operated under
severe conditions of high temperatures and high
humidities such as places exposed to rain, wind
and vapor.
(4)The ZNR Varistors shall be free from dust, salty
wind and atomospheres polluted by corrosive
gas.
2.5.4 Soldering Conditions
In soldering of the ZNR Varistors, the soldering
conditions shall conform to the each individual
specification of the device for prevent mechanical/
electrical failures.
2.6 Long Term Storage
2.5 Precautions for Assemblies and Handlings
2.5.1 Solvent Cleaning
Organic solvents such as thinner and acetone etc.
shall not be applied to the ZNR Varistors for
preventing deterioration of the external coating or
molding resin.
2.5.2 Abnormal Mechanical Stresses
Abnormal mechanical stresses beyond the specified
values such as strong falling shocks, ribrations and
bending/pulling forces, shall be kept minimum to
prevent mechanical/electrical
failures of the devices.
2.5.3 Plastic Molding
If another plastic molding is applied to the ZNR
Varistors on your option, the influences on reliability
of the ZNR Varistors shall be carefully investigated in
your equipment.
(1)The ZNR Varistors shall not be stored under
severe conditions of high temperatures and high
humidities. Store them indoors under 40 ¡C max.
and 75 %RH max. Use them within one year, if
stored beyond the limit, check the solderbility
before use.
(2)The ZNR Varistors shall not be stored under
corrosive atomospheres such as hydrogen
sulfide, sulfurous acid, chlorine and ammonia.
(3)The ZNR Varistors shall not be exposed to direct
sunlight and shall not be stored under dew
formation.
2.7 Regarding to ÒSafety Regulations of the
VaristorsÓ
In case of applications to UL and CSA standards,
refer to ÒApplication Notes for UL and CSA Recog-
nizedÓ ZNR ÒVaristorsÓ
2.8 Parallel Capacitances of the ZNR Varistors
The ZNR Varistors have relatively high capacitances
specified in the individual specifications, special
consideration shall be taken into account
in applications to high frequency transmission
lines or circuits.
Ð EZ38 Ð
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