ÒZNR
â
Ó
Transient/Surge Absorbers (Type E)
ÒZNR
â
Ó Transient/Surge Absorbers
Type:
E
The ZNR Type E is capable of handling larger surge
energy than the Type D in applications for protection
of electronic equipment or semiconductor devices
from switching and induced lightning surges.
n
Features
l
Very large surge withstanding capability with a
compact size
l
Direct mounting on boards like a power distribution
board available
l
Fast response to steep impulse voltage
l
Low clamping voltage for better surge protection
n
Recommended Applications
n
Related Standards
[UL/CSA recognized models are available on request]
l
UL1449 File No. E86821
(Title: Transient Voltage Surge Suppressors)
l
CSA C22.2 No.1 Class 2221 01 File No. LR-92226
(Title: Accessories and Parts for Electronic Products)
l
Each type designation is not registered by Part Number.
If you have any question on type designation,
please contact and ask our office.
l
Transistor, diode, IC, thyristor or triac semiconductor
protection
l
Surge protection in industrial power plant opera-
tions
l
Relay or electromagnetic valve surge absorption
l
Surge absorption applications in broadcasting,
communications devices, traffic/railroad, agricultural
facilities, waterworks
l
Surge protection of automatic control devices for
power distribution line
n
Precautions for Handling
Note: Ask our factory for Product Specification before
use.
n
Explanation of Part Numbers
E
R
Z
C
E
K
n
Dimensions in mm (not to scale)
Part No.
ERZC20EK
ERZC32EK
W
48±1
60±1
H
42±1
55±1
L
39±1
51±1
ÒZNR
â
Ó
Transient/Surge Absorbers (Type E)
20 Series
n
Ratings and Characteristics (ERZC20EK)
l
Operating Temperature Range : Ð40 to 85 ûC
l
Storage Temperature Range
: Ð40 to 110 ûC
l
Temperature Coefficient of Varistor Voltage : 0 to Ð0.05 %/ ûC
Varistor
Voltage
Maximum
Allowable
Voltage
Maximum
Clamping
Voltage
V
100 A
(V)
340
395
455
595
650
710
775
845
1025
1120
1240
1290
1355
1500
1650
1815
Rated
Power
(W)
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
Energy
(2 ms)
(J)
80
95
100
120
130
140
150
150
160
175
190
200
215
240
245
250
Maximum
Typical
Peak Current
Capacitance
(8/20 µs)
(Reference)
1 time 2 times
(A)
(A)
@1 kHz (pF)
8000 5000
2300
8000 5000
1500
8000 5000
1400
8000 5000
1300
8000 5000
1200
8000 5000
1000
8000 5000
950
8000 5000
930
8000 5000
900
8000 5000
850
8000 5000
800
8000 5000
800
8000 5000
700
8000 5000
700
8000 5000
400
8000 5000
350
Part No.
V
1 mA
(V)
ACrms (V) DC (V)
ERZC20EK201
200 (185 Ð 225)
130
170
ERZC20EK241
240 (216 Ð 264)
150
200
ERZC20EK271
270 (247 Ð 303)
175
225
ERZC20EK361
360 (324 Ð 396)
230
300
ERZC20EK391
390 (351 Ð 429)
250
320
ERZC20EK431
430 (387 Ð 473)
275
350
ERZC20EK471
470 (423Ð 517)
300
385
ERZC20EK511
510 (459 Ð 561)
320
415
ERZC20EK621
620 (558 Ð 682)
385
505
ERZC20EK681
680 (612 Ð 748)
420
560
ERZC20EK751
750 (675 Ð 825)
460
615
ERZC20EK781
780 (702 Ð 858)
485
640
ERZC20EK821
820 (738 Ð 902)
510
670
ERZC20EK911
910 (819 Ð1001)
550
745
ERZC20EK102
1000 (900Ð1100)
625
825
ERZC20EK112
1100 (990Ð1210)
680
895
32 Series
n
Ratings and Characteristics (ERZC32EK)
l
Operating Temperature Range : Ð40 to 85 ûC
l
Storage Temperature Range
: Ð40 to 110 ûC
l
Temperature Coefficient of Varistor Voltage : 0 to Ð0.05 %/ ûC
Varistor
Voltage
Maximum
Allowable
Voltage
Maximum
Clamping
Voltage
V
200 A
(V)
340
395
455
595
650
710
775
845
1025
1120
1240
1290
1355
1500
1650
1815
Rated
Power
(W)
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
Energy
(2 ms)
(J)
210
240
255
325
350
400
405
405
415
450
500
520
545
600
620
640
Maximum
Typical
Peak Current
Capacitance
(8/20 µs)
(Reference)
1 time 2 times
(A)
(A)
@1 kHz (pF)
25000 20000
5500
25000 20000
5000
25000 20000
4200
25000 20000
3500
25000 20000
3000
25000 20000
2500
25000 20000
2500
25000 20000
2400
25000 20000
2200
25000 20000
2100
25000 20000
2000
25000 20000
1900
25000 20000
1800
25000 20000
1700
25000 20000
1000
25000 20000
800
Part No.
V
1 mA
(V)
ACrms (V) DC (V)
ERZC32EK201
200 (185 Ð 225)
130
170
ERZC32EK241
240 (216 Ð 264)
150
200
ERZC32EK271
270 (247 Ð 303)
175
225
ERZC32EK361
360 (324 Ð 396)
230
300
ERZC32EK391
390 (351 Ð 429)
250
320
ERZC32EK431
430 (387 Ð 473)
275
350
ERZC32EK471
470 (423 Ð 517)
300
385
ERZC32EK511
510 (459 Ð 561)
320
415
ERZC32EK621
620 (558 Ð 682)
385
505
ERZC32EK681
680 (612 Ð 748)
420
560
ERZC32EK751
750 (675 Ð 825)
460
615
ERZC32EK781
780 (702 Ð 858)
485
640
ERZC32EK821
820 (738 Ð 902)
510
670
ERZC32EK911
910 (819 Ð1001)
550
745
ERZC32EK102
1000 (900Ð1100)
625
825
ERZC32EK112
1100 (990Ð1210)
680
895
ÒZNR
â
Ó
Transient/Surge Absorbers (Type E)
n
Typical Characteristics (Type E)
Voltage vs. Current
(ERZC20EK201 to ERZC20EK511)
Max. Leakage Current
Max. Clamping Voltage
91
EK3
C20
1
ERZ
K43
E
C20
471
ERZ
EK
C20
ERZ
511
0EK
ZC2
ER
1
271
K36
20EK
20E
RZC
E
ERZC20EK511
ERZC20EK471
ERZC20EK431
ERZC20EK391
ERZC20EK361
ERZC20EK271
ERZC20EK241
ERZC20EK201
ZC
ER
41
E K2
C20
01
ERZ
20EK2
ZC
ER
-
-
-
-
-
-
-
-
-
(ERZC20EK621 to ERZC20EK112)
Max. Leakage Current
Max. Clamping Voltage
ERZC20EK112
ERZC20EK102
ERZC20EK911
ERZC20EK821
ERZC20EK781
ERZC20EK751
ERZC20EK681
1
K82
20E 81
ZC
7
ER
0EK 1
2
ZC
K75
ER
20E
ZC
681
ER
EK
C20
RZ
E
112
EK
C20
K102
RZ
E
E
20
ZC
11
K9
ER
20E
C
RZ
E
21
K6
20E
ZC
ER
ERZC20EK621
-
-
-
-
-
-
-
-
-
n
Impulse Derating Curve (Relation between impulse width and surge repetition times)
20 Series
(ERZC20EK201 to ERZC20EK271)
20 Series
(ERZC20EK361 to ERZC20EK681)
20 Series
(ERZC20EK751 to ERZC20EK112)
ÒZNR
â
Ó
Transient/Surge Absorbers (Type E)
n
Typical Characteristics (Type E)
Voltage vs. Current
(ERZC32EK201 to ERZC32EK511)
Max. Leakage Current
Max. Clamping Voltage
ERZC32EK511
ERZC32EK471
ERZC32EK431
ERZC32EK391
ERZC32EK361
ERZC32EK271
ERZC32EK241
ERZC32EK201
71
K4
32E 31
4
ZC
ER 32EK 1
39
ZC
ER 32EK
C
RZ
E
11
K5
32E
ZC
ER
1
36
EK
32
71
ZC
2EK2
ER
C 3
Z
41
ER
K2
32E
1
ZC
E K20
ER
32
ZC
ER
-
-
-
-
-
-
-
-
-
(ERZC32EK621 to ERZC32EK112)
Max. Leakage Current
Max. Clamping Voltage
ERZC32EK112
ERZC32EK102
ERZC32EK911
ERZC32EK821
ERZC32EK781
ERZC32EK751
ERZC32EK681
ERZC32EK621
12
K1
2E 02
C3 EK1 1
Z
E R C 32 K 91
Z
E
E R C 32
Z
ER
1
78
EK 1
32 K 75
ZC E
1
E R C 32 K 68
Z
E
E R C 32
Z
1
82
ER
EK
32
ZC
ER
32
EK
62
1
E
C
RZ
-
-
-
-
-
-
-
-
-
n
Impulse Derating Curve (Relation between impulse width and surge repetition times)
32 Series
(ERZC32EK201 to ERZC32EK271)
32 Series
(ERZC32EK361 to ERZC32EK681)
32 Series
(ERZC32EK751 to ERZC32EK112)
ÒZNR
â
Ó
Transient/Surge Absorbers (Type E)
n
Performance Characteristics (Type E)
Characteristics
Standard Test
Condition
Varistor Voltage
Maximum Allowable
Voltage
Clamping Voltage
Rated Power
Electrical
Energy
Test Methods/Description
Electrical characteristics shall be measured at following conditions
(Temperature: 5 to 35 ¡C,Humidity: Max. 85 %)
The voltage between two terminals with the specified measuring
current CmA DC applied is called Vc or V
CmA
. The measurement
shall be made as fast as possible to avoid heat affection.
The maximum sinusoidal wave voltage (rms) or the maximum
DC voltage that can be applied continuously.
The maximum voltage between two terminals with the specified
standard impulse current (8/20 µs).
The maximum power that can be applied within the specified
ambient temperature.
The maximum energy within the varistor voltage change of
±10 % when one impulse of 2 ms is applied.
The maximum current within the varistor voltage change of
2 times ±10 % with the standard impulse current (8/20 µs) applied two
times with an interval of 5 minutes.
1 time
The maximum current within the varistor voltage change of ±10 %
with the standard impulse current (8/20 µs) applied one time.
V
C
at 70 ¡C Ð V
C
at 20 ¡C
1
´
´
100 (%/ ¡C)
50
V
C
at 20 ¡C
The change of Vc shall be measured after the impulse listed
below is applied 10000 times continuously with the interval of
ten seconds at room temperature.
20 Series
32 Series
200 A (8/20 µs)
300 A (8/20 µs)
Specifications
ÑÑ
To meet the
specified value.
Maximum
Peak
Current
Temperature Coefficient
of Varistor Voltage
0 to Ð0.05 %/ûC max.
Impulse Life
ÆV
1mA
/V
1mA
<
±10 %
Withstanding Voltage The commercial frequency voltage of AC 2.5 kV shall be applied
between terminals and the bottom of the unit for one minute.
(Body Insulation)
Robustness of
Terminations
(Tensile)
After gradually applying the load of 49 N (5 kgf) and keeping
the unit fixed for 10 seconds in an axial direction, the terminal
shall be visually examined for any damage.
After repeadly applying a single harmonic vibration (amplitude:
0.75 mm): double amplitude: 1.5 mm with 1 minute vibration
frequency cycles (10 Hz to 55 Hz to 10 Hz) to each of three
perpendicular directions for 2 hours. Thereafter, the damage
of the terminals is visually examined.
The temperature cycle shown below shall be repeated five
times and then stored at room temperature and humidity for
one to two hours. The change of Vc and mechanical damage
shall be examined.
Step Temperature (ûC) Period (minutes)
1
2
3
4
Ð25
Room Temp.
85
+ 3
0
Room Temp.
0
Ð3
No remarkable
damage
Mechanical
No remarkable
damage
Vibration
Temperature Cycle
30
3 max.
3
30
+ 0
3 max.
+3
0
No remarkable
damage
ÆV
1mA
/V
1mA
<
±5 %
Environmental
Dry Heat/
High Temperature
Storage
Dry Heat Load/
High Temperature
Load
The specimen shall be subjected to 110±3 ¡C for 500 hours in
a thermostatic bath without load and then stored at room
temperature and humidity for one to two hours. Thereafter, the
change of Vc shall be measured.
After being continuously applied the Maximum Allowable Voltage
at 85±5 ¡C for 500 hours, the specimen shall be stored at room
temperature and humidity for one to two hours. Thereafter, the
change of Vc shall be measured.
The specimen shall be subjected to 40±2 ¡C, 90 to 95 %RH for
1000 hours without load and then stored at room temperature
and humidity for one to two hours. Thereafter, the change of
Vc shall be measured.
ÆV
1mA
/V
1mA
<
±5 %
ÆV
1mA
/V
1mA
<
±10 %
Damp Heat/Humidity
(Steady State)
ÆV
1mA
/V
1mA
<
±5 %
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