“ZNR” Transient/Surge Absorbers (Type E)
“ZNR” Transient/Surge Absorbers
Type :
E
The ZNR Type E is capable of handling larger surge
energy than Type D in applications to protect electronic
equipment or semiconductor devices from switching and
induced lightning surges.
Features
● UL and CSA recognized components
● Very large surge withstanding capability with a compact size
● Direct mounting on boards like a power distribution board available
● Fast response to steep impulse voltage
● Low clamping voltage for better surge protection
● RoHS compliant
Recommended Applications
● Transistor, diode, IC, thyristor or triac semiconductor protection
● Surge protection in industrial power plant operations
● Relay or electromagnetic valve surge absorption
● Surge absorption applications in broadcasting, communications devices, traffic/railroad, agricultural facilities, waterworks
● Surge protection of automatic control devices for power distribution line
Related Standards
Standard No.
UL1449
Title
Surge Protective Devices
CSA C22.2 No.269.5
Accessories and Parts for Electronic Products
(Varistor for Across-The-Line use as transient
protection on 120V ac nominal system)
● Each type designation is not registered by Part Number.
Note : Ask our factory for Product Specification before use.
■ As for Handling Precautions and Minimum Quantity / Packing Unit
Please see Related Information
Explanation of Part Numbers
1
2
3
4
E
R
Z
C
Product Code
5
6
Element Size
7
8
E
K
Type
Tolerance
9
10
11
Nominal
Varistor Voltage
12
Design No.
–
Y
General
UL/CSA Recognized
Dimensions in mm (not to scale)
ISO
M4
(Unit : mm)
4.3
24
W
H
L
ERZC20EK□□□(Y)
48±1
42±1
39±1
ERZC32EK□□□(Y)
60±1
55±1
51±1
H
5
L
W
12
Part No.
ZNR
Part No.
Date code
14
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
“ZNR” Transient/Surge Absorbers (Type E)
20 Series (UL and CSA Recognized)
Ratings and Characteristics(ERZC20EK)
●
●
Operating Temperature Range : –40 to 85 °C
Storage Temperature Range : –40 to 110 °C
Part No.
(UL/CSA
Recognized)
ERZC20EK201Y
ERZC20EK241Y
ERZC20EK271Y
ERZC20EK361Y
ERZC20EK391Y
ERZC20EK431Y
ERZC20EK471Y
ERZC20EK511Y
ERZC20EK621Y
ERZC20EK681Y
ERZC20EK751Y
ERZC20EK781Y
ERZC20EK821Y
ERZC20EK911Y
ERZC20EK102Y
ERZC20EK112Y
Type
Designation
20EK201U
20EK241U
20EK271U
20EK361U
20EK391U
20EK431U
20EK471U
20EK511U
20EK621U
20EK681U
20EK751U
20EK781U
20EK821U
20EK911U
20EK102U
20EK112U
Varistor
Voltage
Maximum
Allowable
Voltage
V1 mA (V)
ACrms (V) DC (V)
200 (185 to 225)
130
170
240 (216 to 264)
150
200
270 (247 to 303)
175
225
360 (324 to 396)
230
300
390 (351 to 429)
250
320
430 (387 to 473)
275
350
470 (423 to 517)
300
385
510 (459 to 561)
320
415
620 (558 to 682)
385
505
680 (612 to 748)
420
560
750 (675 to 825)
460
615
780 (702 to 858)
485
640
820 (738 to 902)
510
670
910 (819 to 1001)
550
745
1000 (900 to 1100)
625
825
1100 (990 to 1210)
680
895
Maximum
Clamping
Voltage
V100 A (V)
340
395
455
595
650
710
775
845
1025
1120
1240
1290
1355
1500
1650
1815
Energy
(2 ms)
1 time
(J)
80
95
100
120
130
140
150
150
160
175
190
200
215
240
245
250
Maximum
Rated
Peak Current
Voltage
(8/20 μs)
(UL/CSA)
1 time
(A)
ACrms (V)
8000
118
8000
136
8000
159
8000
209
8000
227
8000
250
8000
272
8000
291
8000
350
8000
381
8000
418
8000
440
8000
463
8000
500
8000
568
8000
600
32 Series (UL and CSA Recognized)
Ratings and Characteristics(ERZC32EK)
●
●
Operating Temperature Range : –40 to 85 °C
Storage Temperature Range : –40 to 110 °C
Part No.
(UL/CSA
Recognized)
ERZC32EK201Y
ERZC32EK241Y
ERZC32EK271Y
ERZC32EK361Y
ERZC32EK391Y
ERZC32EK431Y
ERZC32EK471Y
ERZC32EK511Y
ERZC32EK621Y
ERZC32EK681Y
ERZC32EK751Y
ERZC32EK781Y
ERZC32EK821Y
ERZC32EK911Y
ERZC32EK102Y
ERZC32EK112Y
Type
Designation
32EK201U
32EK241U
32EK271U
32EK361U
32EK391U
32EK431U
32EK471U
32EK511U
32EK621U
32EK681U
32EK751U
32EK781U
32EK821U
32EK911U
32EK102U
32EK112U
Varistor
Voltage
Maximum
Allowable
Voltage
V1 mA (V)
ACrms (V) DC (V)
200 (185 to 225)
130
170
240 (216 to 264)
150
200
270 (247 to 303)
175
225
360 (324 to 396)
230
300
390 (351 to 429)
250
320
430 (387 to 473)
275
350
470 (423 to 517)
300
385
510 (459 to 561)
320
415
620 (558 to 682)
385
505
680 (612 to 748)
420
560
750 (675 to 825)
460
615
780 (702 to 858)
485
640
820 (738 to 902)
510
670
910 (819 to 1001)
550
745
1000 (900 to 1100)
625
825
1100 (990 to 1210)
680
895
Maximum
Clamping
Voltage
V100 A (V)
340
395
455
595
650
710
775
845
1025
1120
1240
1290
1355
1500
1650
1815
Energy
(2 ms)
1 time
(J)
210
240
255
325
350
400
405
405
415
450
500
520
545
600
620
640
Maximum
Rated
Peak Current
Voltage
(8/20 μs)
(UL/CSA)
1 time
(A)
ACrms (V)
25000
118
25000
136
25000
159
25000
209
25000
227
25000
250
25000
272
25000
291
25000
350
25000
381
25000
418
25000
440
25000
463
25000
500
25000
568
25000
600
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
04 Nov. 2018
“ZNR” Transient/Surge Absorbers (Type E)
20 Series
Ratings and Characteristics(ERZC20EK)
●
●
Operating Temperature Range : –40 to 85 °C
Storage Temperature Range : –40 to 110 °C
Part No.
Varistor
Voltage
Maximum
Allowable
Voltage
V1 mA (V)
ACrms (V) DC (V)
ERZC20EK201 200 (185 to 225)
130
170
ERZC20EK241 240 (216 to 264)
150
200
ERZC20EK271 270 (247 to 303)
175
225
ERZC20EK361 360 (324 to 396)
230
300
ERZC20EK391 390 (351 to 429)
250
320
275
350
ERZC20EK431 430 (387 to 473)
ERZC20EK471 470 (423 to 517)
300
385
ERZC20EK511 510 (459 to 561)
320
415
ERZC20EK621 620 (558 to 682)
385
505
ERZC20EK681 680 (612 to 748)
420
560
ERZC20EK751 750 (675 to 825)
460
615
ERZC20EK781 780 (702 to 858)
485
640
ERZC20EK821 820 (738 to 902)
510
670
ERZC20EK911 910 (819 to 1001)
550
745
ERZC20EK102 1000 (900 to 1100)
625
825
ERZC20EK112 1100 (990 to 1210)
680
895
Maximum
Clamping
Voltage
Rated
Power
Energy
(2 ms)
V100 A (V)
340
395
455
595
650
710
775
845
1025
1120
1240
1290
1355
1500
1650
1815
(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
(J)
80
95
100
120
130
140
150
150
160
175
190
200
215
240
245
250
Maximum
Clamping
Voltage
Rated
Power
Energy
(2 ms)
V200 A (V)
340
395
455
595
650
710
775
845
1025
1120
1240
1290
1355
1500
1650
1815
(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
(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)
at 1kHz (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
32 Series
Ratings and Characteristics(ERZC32EK)
●
●
Operating Temperature Range : –40 to 85 °C
Storage Temperature Range : –40 to 110 °C
Part No.
ERZC32EK201
ERZC32EK241
ERZC32EK271
ERZC32EK361
ERZC32EK391
ERZC32EK431
ERZC32EK471
ERZC32EK511
ERZC32EK621
ERZC32EK681
ERZC32EK751
ERZC32EK781
ERZC32EK821
ERZC32EK911
ERZC32EK102
ERZC32EK112
Varistor
Voltage
Maximum
Allowable
Voltage
V1 mA (V)
ACrms (V) DC (V)
200 (185 to 225)
130
170
240 (216 to 264)
150
200
270 (247 to 303)
175
225
360 (324 to 396)
230
300
390 (351 to 429)
250
320
430 (387 to 473)
275
350
470 (423 to 517)
300
385
510 (459 to 561)
320
415
620 (558 to 682)
385
505
680 (612 to 748)
420
560
750 (675 to 825)
460
615
780 (702 to 858)
485
640
820 (738 to 902)
510
670
910 (819 to 1001)
550
745
1000 (900 to 1100)
625
825
1100 (990 to 1210)
680
895
Maximum
Typical
Peak Current
Capacitance
(8/20 μs)
(Reference)
1 time 2 times
(A)
(A)
at 1kHz (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
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
04 Nov. 2018
“ZNR” Transient/Surge Absorbers (Type E)
Typical Characteristics(Type E)
Voltage vs. Current
(ERZC20EK201(Y) to ERZC20EK511(Y))
Max. Leakage Current
Max. Clamping Voltage
2000
1000
900
800
700
600
)
91(Y
EK3
)
C20
31(Y
4
ERZ
K
E
)
C20
71(Y
ERZ
EK4
C20
)
Y
(
ERZ
511
0EK
ZC2
ER
500
Voltage (V)
ERZC20EK511(Y)
ERZC20EK471(Y)
ERZC20EK431(Y)
ERZC20EK391(Y)
ERZC20EK361(Y)
ERZC20EK271(Y)
ERZC20EK241(Y)
400
300
ERZC20EK201(Y)
)
(Y)
1(Y
271
K36 20EK
20EERZC
Y)
41(
)
EK2
C20 201(Y
Z
R
E
0EK
ZC2
R
E
ZC
ER
200
100
90
80
70
60
Test Current Waveform
10-6 to 10-3 A: Direct Current
10-1 to 104 A: 8/20 μs
50
40
30
10-6
(ERZC20EK621(Y) to ERZC20EK112(Y))
10-5
10-4
10-3
10-2
10-1
100
Current (A)
Max. Leakage Current
101
102
103
104
105
Max. Clamping Voltage
4000
ERZC20EK112(Y)
ERZC20EK102(Y)
ERZC20EK911(Y)
ERZC20EK821(Y)
ERZC20EK781(Y)
ERZC20EK751(Y)
ERZC20EK681(Y)
3000
Voltage (V)
2000
ERZC20EK621(Y)
)
1(Y
K82
20E 81(Y)
ZC
7
R
K
E
20E 51(Y)
ZC
K7
ER
)
20E
1(Y
ZC
R
E
K68
E
0
)
C2
Y
Z
(
2
ER
)
K11
20E 102(Y
ZC
K
ER
0E
2
Y)
(
ZC
11
K9
ER
0E
C2
Z
ER
1000
900
800
700
600
500
C
RZ
Y)
21(
K6
20E
400
E
300
Test Current Waveform
10-6 to 10-3 A: Direct Current
10-1 to 104 A: 8/20 μs
200
10-6
10-5
10-4
10-3
10-2
10-1
100
Current (A)
101
102
103
104
105
Impulse Derating Curve (Relation between impulse width and surge, repetitively)
(ERZC20EK201(Y) to ERZC20EK271(Y))
10000
8000
6000
1000
800
600
400
200
100
80
60
40
20
Ti
m
2
e
Ti
m
10 es
T
10 2ime
s
Ti
m
10 3 es
Ti
10 4 mes
Tim
es
10 5
T
10 6 imes
Tim
es
Impulse Current (A)
Impulse Current (A)
2000
1000
800
600
400
200
100
80
60
40
20
(ERZC20EK751(Y) to ERZC20EK112(Y))
10000
8000
6000
2 times : 5 minutes
to 10 times : 2 minutes
6
to 10 times : 10 seconds
4000
2000
1
20 Series
(ERZC20EK361(Y) to ERZC20EK681(Y))
10000
8000
6000
2 times : 5 minutes
to 10 times : 2 minutes
6
to 10 times : 10 seconds
4000
20 Series
1
2000
Ti
m
10
2
Ti
Ti
e
m
m
es
es
10 2
Ti
m
10 3 es
Ti
m
es
10 4
Tim
es
10 5
Ti
10 6 mes
Tim
es
1000
800
600
400
200
100
80
60
40
20
10
8
6
4
10
8
6
4
2
2
2
1
1
10
8
6
4
20
100
1000
Impulse Width (μs)
10000
20
2 times : 5 minutes
to 10 times : 2 minutes
6
to 10 times : 10 seconds
4000
Impulse Current (A)
20 Series
2
1
Ti
Ti
m
m
10
es
Ti
e
m
es
10 2
10 3 Tim
e
s
T
10 4 ime
Tim s
10 5
es
10 6
Tim
e
Tim s
es
1
100
1000
Impulse Width (μs)
10000
20
100
1000
Impulse Width (μs)
10000
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
04 Nov. 2018
“ZNR” Transient/Surge Absorbers (Type E)
Typical Characteristics(Type E)
Voltage vs. Current
(ERZC32EK201(Y) to ERZC32EK511(Y))
Max. Leakage Current
Max. Clamping Voltage
ERZC32EK511(Y)
ERZC32EK471(Y)
ERZC32EK431(Y)
ERZC32EK391(Y)
ERZC32EK361(Y)
2000
1000
900
800
700
600
500
Voltage (V)
ERZC32EK271(Y)
ERZC32EK241(Y)
ERZC32EK201(Y)
Y)
71(
K4 Y)
2E
31(
C3
4
Z
ER 32EK 1(Y)
39
ZC
ER 32EK
ZC
Y)
ER
11(
K5
32E
C
Z
ER
)
1(Y
36 Y)
EK
32 271(
C
K
Z
ER C32E
Y)
Z
41(
ER
K2 Y)
E
2
(
C3 K201
Z
ER 32E
ZC
ER
400
300
200
100
90
80
70
60
50
Test Current Waveform
10-6 to 10-3 A: Direct Current
10-1 to 104 A: 8/20 μs
40
30
10-6
(ERZC32EK621(Y) to ERZC32EK112(Y))
10-5
10-4
10-3
10-2
10-1
100
Current (A)
Max. Leakage Current
4000
101
102
103
104
ERZC32EK112(Y)
ERZC32EK102(Y)
ERZC32EK911(Y)
ERZC32EK821(Y)
ERZC32EK781(Y)
ERZC32EK751(Y)
ERZC32EK681(Y)
ERZC32EK621(Y)
Max. Clamping Voltage
3000
Voltage (V)
2000
105
)
2(Y
11 )
EK 2(Y
32 K10 Y)
C
Z
E
1(
ER C32 K91
Z
E
ER C32
Z
)
ER
1(Y
78 )
EK 51(Y
2
)
3
7
ZC EK 1(Y
ER C32 K68
Z
E
)
ER C32
Z
1(Y
82
ER
EK
2
3
ZC
ER
)
1(Y
62
EK
2
3
ZC
ER
1000
900
800
700
600
500
400
300
Test Current Waveform
10-6 to 10-3 A: Direct Current
10-1 to 104 A: 8/20 μs
200
10-6
10-5
10-4
10-3
10-2
10-1
100
Current (A)
101
103
102
104
105
Impulse Derating Curve (Relation between impulse width and surge, repetitively)
32 Series
32 Series
2 times : 5 minutes
to 10 times : 2 minutes
6
to 10 times : 10 seconds
20000
10000
8000
6000
e
10 s
2000
Ti
m
40
20
es
10 2
Tim
10 3
es
Tim
es
10 4
10 5
10 6
2
Ti
1
m
e
Tim
es
Tim
1000
800
600
400
200
100
80
60
es
40
es
20
es
4000
Ti
10
e
2000
m
1000
800
600
Ti
es
10 2
Tim
10 3
es
Tim
es
10 4
10 5
10 6
Tim
2
m
Tim
Tim
es
400
Tim
10
8
6
4
4
4
2
2
10000
20
m
Ti
es
m
es
10 4
10
8
6
100
1000
Impulse Width (μs)
1
10 2 0 T
i
10 3
10
8
6
20
es
100
80
60
20
es
m
200
40
es
Ti
e
Impulse Current (A)
m
200
100
80
60
4000
Ti
m
10000
8000
6000
m
400
10000
8000
6000
2 times : 5 minutes
to 10 times : 2 minutes
6
to 10 times : 10 seconds
20000
Ti
1000
800
600
Ti
(ERZC32EK751(Y) to ERZC32EK112(Y))
1
2000
1
2
32 Series
2 times : 5 minutes
to 10 times : 2 minutes
6
to 10 times : 10 seconds
20000
Impulse Current (A)
4000
(ERZC32EK361(Y) to ERZC32EK681(Y))
Impulse Current (A)
(ERZC32EK201(Y) to ERZC32EK271(Y))
Tim
10 5
10 6
es
Tim
es
es
Tim
Tim
es
2
100
1000
Impulse Width (μs)
10000
20
100
1000
Impulse Width (μs)
10000
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
04 Nov. 2018
“ZNR” Transient/Surge Absorbers (Type E)
Performance Characteristicsv (Type E)
Electrical
Characteristics
Test Methods/Description
Specifications
Standard Test
Condition
Electrical characteristics shall be measured at following conditions
(Temperature: 5 to 35 °C,Humidity: Max. 85 %)
———
Varistor Voltage
The voltage between two terminals with the specified measuring
current CmA DC applied is called Vc or VCmA. The measurement shall
be made as fast as possible to avoid heat affection.
Maximum Allowable
Voltage
The maximum sinusoidal wave voltage (rms) or the maximum DC
voltage that can be applied continuously.
Clamping Voltage
The maximum voltage between two terminals with the specified
standard impulse current (8/20 μs).
Rated Power
The maximum power that can be applied within the specified To meet the
ambient temperature.
specified value.
Energy
The maximum energy within the varistor voltage change of ±10 %
when one impulse of 2 ms is applied.
Maximum
Peak Current
The maximum current within the varistor voltage change of ±10 %
2 times with the standard impulse current (8/20 μs) applied two times with
an interval of 5 minutes.
1 time
Temperature Coefficient
of Varistor Voltage
Impulse Life
The maximum current within the varistor voltage change of ±10 %
with the standard impulse current (8/20 μs) applied one time.
VC at 70 °C – VC at 20 °C
1
×
× 100 (%/°C)
50
VC at 20 °C
0 to –0.05 %/°C max.
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.
ΔV1 mA /V1 mA < ±10 %
20 Series
32 Series
200 A (8/20 μs)
300 A (8/20 μs)
Mechanical
Withstanding Voltage The commercial frequency voltage of AC 2.5 kV shall be applied No remarkable
between terminals and the bottom of the unit for one minute.
damage
(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.
Vibration
After repeadly applying a single harmonic vibration (amplitude: No remarkable
0.75 mm): double amplitude: 1.5 mm with 1 minute vibration damage
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.
Environmental
Dry Heat/ High
Temperature
Storage
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.
Step
1
2
3
4
Temperature (°C)
–25 –30
Room Temp.
85+30
Room Temp.
Period (minutes)
30+30
3 max.
30+30
3 max.
ΔV1 mA /V1 mA < ±5 %
Temperature Cycle
The temperature cycle shown below shall be repeated five No remarkable
times and then stored at room temperature and humidity for damage
one to two hours. The change of Vc and mechanical damage ΔV1 mA 1 mA
/V
< ±5 %
shall be examined.
Dry Heat Load/
High Temperature
Load
After being continuously applied the Maximum Allowable Voltage
at 85±5 °C for 500 hours, the specimen shall be stored at room ΔV1 mA /V1 mA ±10 %
<
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
Damp Heat/Humidity 1000 hours without load and then stored at room temperature ΔV1 mA /V1 mA ±5 %
<
(Steady State)
and humidity for one to two hours. Thereafter, the change of Vc
shall be measured.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
04 Nov. 2018
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$SU
“ZNR” Transient/Surge Absorbers
“ZNR” Transient/Surge Absorbers, Type E
“ZNR” Transient/Surge Absorbers, Type CK, SC
Handling Precautions
Safety Precautions
In case that a ZNR Surge Absorber (hereafter referred to as the ZNR, or product name) is used, if an
abnormality takes place because of peripheral conditions of the ZNR(material, environments, power source
conditions, circuit conditions, etc. in equipment design), fire, electric shock, burn, or product failure may be
occur. The precautions for this product are described below, understand the content thoroughly before usage.
For more questions, contact us.
If there's any uncertainty/doubt/products safety items, please contact us. When a dogma shall be occurred
about safety for this products, be sure to inform us rapidly, operate your technical examination.
1.
Operating Conditions precautions to be strictly observed
1.1 Confirmation of performance ratings
Use the ZNR within its rated range of performance such as the Max. allowable voltage, withstanding surge
current, withstanding energy, impulse life(surge life), average pulse power, and operating temperature range.
If used outside the range, the ZNR can be degrade and have element fracture, which may result in smoking
and ignition.
1.2 To avoid accidents due to unexpected phenomena, take the following measures
1) Across-the-line use
When the ZNR is used across a line, put a current fuse in series with the ZNR (Refer to Table 1).
2) Use between line to ground
(1) If the case that the ZNR is used between a line to the ground, the short-circuit of the ZNR may not
blow the current fuse because of grounding resistance, which may cause smoking and ignition of the
ZNR’s exterior resin.
As the measure against it, install an earth leakage breaker on the power supply side of the ZNR
position. If no earth leakage breaker is installed, use a thermal fuse together wth a current fuse in
series. (Refer to Table 1.)
(2) If the case that the ZNR is used between a live part to metal case, an electric shock may develop at a
shortcircuit of the ZNR ; hence, ground the metal case to the ground or keep it from the human body.
3) In the event of fracture of the ZNR, its pieces may scatter ; hence, put the case or cover of the set product
in place.
4) Do not install the ZNR near combustible substances(polyvinyl chloride wires, resin moldings, etc.).
If it is difficult to do, install a nonflammable cover.
1.3 The live part shall be equipped with a protective cover for preventing electric shock.
1.4 If ZNR is shorted out and happen smoke or ignition, please cut provided current to ZNR immediately.
● Recommendation fuse
Series
ERZC20EK□□□
ERZC32□K□□□
ERZVS34C□□□
ERZC40CK□□□
Current Fuse
10 A max.
20 A max.
20 A max.
20 A max.
( Line - Line )
Thermal. Fuse
100 to 120 °C 5 A 100 to 120 °C 10 A 100 to 120 °C 10 A 100 to 120 °C 10 A
( Line - Ground )
◆ Fuses shall use rated voltages ap pro pri ate for circuits.
◆ Finally, confi rm that the secondary disaster does not occur even if the ZNR mounted on equipment breaks.
◆ Set a thermal fuse to get high thermal conductivity with ZNR.
2. Application notes
2.1 Pay attention to the following items to avoid the shortened life and failure of the ZNR
1) Circuit conditions
(1) Select a ZNR of which the maximum voltage including fluctuations in source voltage allows for the
maximum permissible circuit voltage.
01. Oct. 2019
“ZNR” Transient/Surge Absorbers
(2) In cases that surges are intermittently applied at short intervals (for example, in the case that the voltage
of the noise simulator test is impressed), do not cause them to exceed the ZNR's rated pulse power.
(3) Select a ZNR recommended in Table 1.
①Across-the-Line Use
Because the primary line voltage temporarily rises due to load unbalance of separately wired loads, short
circuit between the live line and the neutral line or LC resonance at switching for a capacitate load, ZNR
with * are recommended for AC100V or AC120V applications.
②Line to ground Use
・When DC500V insulation resistance test of the circuits employing ZNR is conducted, the ZNR shall be
removed after getting approval from the customer, or the ZNR ** with the Maximum Allowable voltage
exceeding to the test voltage shall be applied.
・When AC1000V dielectric with standing test is conducted, ZNR shall be removed after getting approval
from the customer according to the relevant regulations, or the ZNR *** with the Maximum Allowable
voltage exceeding to the test voltage shall be applied.
2) Operating environments
(1) The ZNR is designed and manufactured for application in general purpose electronic devices.
The ZNR shall not be exposed to the weather, except for usage inside unit.
(2) Do not use the ZNR in places exposed to temperatures beyond the operating temperature range, such
as places exposed to sunlight and vicinities of heating equipment.
(3) Do not use the ZNR in places exposed to high temperatures and high humidity, such as places exposed
directly to rain, wind, dew condensation, and vapor.
(4) Do not use the ZNR in dusty and salinity environment and atmospheres polluted by corrosive gases,
in liquids such as water, oil, chemical, organic solvent.
3) Processing conditions
(1) Do not wash the ZNR by such solvents(thinner, acetone, etc.) as its exterior resin deteriorates.
(2) Do not apply a strong vibration or shock (by falling, etc.) to the ZNR, cracking to its exterior resin
and element may occur.
(3) When coating the ZNR with resin(including molding), do not use such resin.
(4) Do not bend the ZNR lead wires at the position close to its ZNR exterior resin, or apply external force to
the position.
(5) When soldering the ZNR lead wires, follow the recommended condition and do not melt the solder and
insulating materials constituting the ZNR.
(6) Keep the wiring of the ZNR as short and straight as possible.
4) Long-term storage
(1) Do not store the ZNR under high temperature and high humidity. Store it indoor environment at a
temperature up to 40 °C and at humidity below 75 %RH, and use it within two years.
Before using the ZNR that has been stored for a long period(two years or longer), confirm the solderability.
(2) Avoid atmospheres full of corrosive gases (hydrogen sulfide, sulfurous acid, chlorine, ammonia, etc.).
(3) Avoid direct sunlight and dew condensation.
2.2 The recommended fuse position is shown in Table.1, "Example of ZNR application", however, if the
load current of protected equipment is larger than that of the above recommended fuse rated current,
install a current fuse at the position shown below.
Current Fuse
Power Source Side
ZNR
Protected
Equipment
01. Oct. 2019
“ZNR” Transient/Surge Absorbers
3. Notices
3.1 In cases that the ZNR is used in equipment (aerospace equipment, medical equipment, etc.) requiring
extremely high reliability, ask us for selection of part No., and protection coordination, etc. in advance.
3.2 There is possibility that the ZNR will unexpectedly smoke or ignite because of abnormal rise of the circuit
voltage and invasion of excessive surge. To prevent that accident from spreading over the equipment and
not to expand the damage, use multiplex protection such as the adoption of frame-retardant materials for
housing parts and structural parts.
3.3. We don’t bear any responsibility for product malfunction or abnormal conditions which caused by using
beyond the descriptions in this product specification.
3.4 Package marking includes the product number, quantity, and country of origin. As a rule, country of origin
should be indicated in English.
4. Applicable laws and regulations , others
4.1 This product not been manufactured with any ozone depleting chemical controlled under the Montreal
Protocol.
4.1 Specified brominated flame retardants (including PBB (polybromobiphenyl) and PBDE (polybromodiphenyl
ether)) are not intentionally used in the components of this product.
4.3 This product comply with RoHS(Restriction of the use of certain Hazardous Substance in electrical and
electronic equipment) (DIRECTIVE 2011/65/EU and 2015/863/EU).
4.4 All the materials used in this part are registered material under the Law Concerning the Examination and
Regulationof Manufacture, etc. of Chemical Substance.
4.5 If you need the notice by letter of “A preliminary judgement on the Laws of Japan foreign exchange and
Foreign Trade Control”, be sure to let us know.
4.6 These products are not dangerous goods on the transportation as identified by UN(United nations) numbers
or UN classification.
5. Others
5.1 As to the disposal of ZNR, check the method of disposal in each country or origin where the ZNR are
incorporated in your products to be used.
5.2 The technical information in this specification provides example of our products’ typical operations and
application circuit. We do not guarantee the non-infringement of third party’s intellectual property rights
and we do not grant any license, right or interest in our intellectual property.
01. Oct. 2019
“ZNR” Transient/Surge Absorbers
Table 1 Example of ZNR application
Across-the-Line/Line to Line Protection
DC/AC
Single-phase
f
Line to Line and Line to Ground Protection
DC/AC
Single-phase
f
ZNR1
ZNR1
Protected
Equipmen
Protected
Connections example
Equipmen
ZNR2
Thermal coupling
Thermal Fuse
f : fuse
AC 3-phase
f : fuse
AC 3-phase
f
f
ZNR3
ZNR3
Protected
Protected
Equipment
Equipmen
ZNR4
Thermal coupling
f : fuse
Selection Examples
ZNR
ZNR 1
ZNR 3
Across the Line Use/Line to Line
Nominal
Part Number of ZNR
Type E, CK, SC
Line Voltage
201
AC 100 V
241
271
AC 120 V
AC 200 V
~ AC 220 V
AC 240 V
ERZC□□EK
ERZC□□CK
ERZVS34C
f : fuse
ZNR
471
Line to Ground Use
Nominal
Part Number of ZNR
Type E, CK, SC
Line Voltage
471
511
821 and more **
AC 100 V
~ AC 220 V
241
271*
Thermal Fuse
ERZC□□EK
ERZC□□CK
ERZVS34C
ZNR 2
ZNR 4
AC 240 V
511
821 and more **
511
01. Oct. 2019