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FUJI Ceramic Surge Absorbers
Z-TRAP
ENF series
220 to 680V (Varistor voltage)
Features
· Flame-resistant
Suppress combustion and smoking after a malfunction caused by larger
surge than the specified value
· Environment-friendly materials
Adopts newly developed halogen-free resin mold and the Pb-free plated
lead wires
· High reliability
Greatly improved heat-cycle resistance
· Small size and high performance
· Ratings and specifications are same as the conventional ENE series.
Ratings and characteristics
Device
type
Maximum rating
Applied voltage *
1
Transient
RMS
DC
Energy *
2
Average
Peak *
3
50Hz/60Hz
power
current
dissipation (8/20µs)
Vacm
[Volts]
Vdcm
[Volts]
Wtm
[Joules]
Ptam
[Watts]
Itm
[Amps]
Characteristics
Nominal varistor voltage *
4
Max. clamping *
5
voltage @test
current
(8/20µs)
Vc
[Volts]
Ip
[Amps]
Typical
capaci-
tance
Vnom
[Volts]
Tolerance
Min.
Max
[Volts]
[Volts]
f=1kHz
[pF]
ENF221D05A
ENF221D07A
ENF221D10A
ENF221D14A
ENF241D05A
ENF241D07A
ENF241D10A
ENF241D14A
ENF271D05A
ENF271D07A
ENF271D10A
ENF271D14A
ENF471D05A
ENF471D07A
ENF471D10A
ENF471D14A
ENF511D10A
ENF511D14A
ENF621D10A
ENF621D14A
ENF681D10A
ENF681D14A
*
1
140
180
150
200
175
225
300
385
320
385
420
410
505
560
6.5
13.5
28.0
55.0
7.5
15.0
30.0
60.0
8.0
17.0
35.0
70.0
15.0
30.0
60.0
125.0
67.0
136.0
67.0
136.0
67.0
136.0
0.1
0.25
0.4
0.6
0.1
0.25
0.4
0.6
0.1
0.25
0.4
0.6
0.1
0.25
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
700
1350
2750
5500
700
1350
2750
5500
700
1350
2750
5500
700
1350
2750
5500
2500
4500
2500
4500
2500
4500
220
198
242
240
216
264
270
247
303
470
423
517
510
620
680
459
558
612
561
682
748
380
360
360
360
415
395
395
395
475
455
455
455
810
775
775
775
845
845
1025
1025
1120
1120
5
10
25
50
5
10
25
50
5
10
25
50
5
10
25
50
25
50
25
50
25
50
170
350
700
1400
170
350
700
1300
150
300
600
1200
80
170
350
700
300
650
270
550
250
500
Operating ambient temperature: -40°C to +85°C
Storage temperature: -40°C to +125°C
*
3
Transient peak current (Itm)
The peak current rating, Itm, is based on 8/20µs test impulse wave
form. This peak current is the maximum peak current at which the
nominal varistor voltage shift dose not exceed ±10% when the test
impulse is applied twice at a 5 minute interval.
*
4
Nominal varistor voltage: Vnom
Indicates the varistor terminal voltage measured with 1mA DC
applied. 05A type 0.1mA DC
*
5
Maximum clamping voltage: Vc
Indicates the peak terminal voltage measured with 8/20µs impulse
current applied.
*
2
The waveform of the maximum DC applied voltage is flat.
When a ripple voltage as from a rectifier source is applied, make
sure that the peak voltage is within the Vdcm rating.
The AC applied voltage (50/60Hz) is a sine waveform.
When waveform distortion is extensive, make sure that the peak
voltage is less than 2 times the Vacm rating.
Energy Wtm
Transient energy rating are given in the Wtm column in Joules (Watt-
second). The rating is the maximum allowable energy of a single 2ms
square-waveform impulse current continuously applied.
Energy ratings are based on a shift of Vnom of less than ±10% of
the initial value.
1
FUJI Ceramic Surge Absorbers
Characteristic curves (Typical)
Transient V-I characteristic curves
2000
(ENF221D05A to ENF471D05A)
Z-TRAP
ENF series 220 to 680V (Varistor voltage)
Max. idle current
Max. clamping voltage
ENF471D05A
1000
900
800
700
600
500
400
ENF271D05A
ENF241D05A
ENF221D05A
71D05A
ENF4
Voltage [V]
300
200
71D05A
ENF2
05A
F241D 5A
EN
1D0
ENF22
100
90
80
70
60
50
40
-6
10
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
700
Current [A]
Transient V-I characteristic curves
2000
(ENF221D07A to ENF471D07A)
Max. clamping voltage
ENF471D07A
Max. idle current
1000
900
800
700
600
500
400
ENF271D07A
ENF241D07A
ENF221D07A
Voltage [V]
1D07A
ENF47
300
200
1D07A
ENF27
1D07A
ENF24
1D07A
ENF22
100
90
80
70
60
50
40
-6
10
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
1350
Current [A]
Transient V-I characteristics curve
2000
(ENF221D10A to ENF471D10A)
Max idle current
Max. clamping voltage
ENF471D10A
1000
900
800
700
600
ENF271D10A
ENF241D10A
ENF221D10A
Voltage [V]
500
400
300
0A
71D1
ENF2
10A
241D
ENF
0A
21D1
ENF2
0A
71D1
ENF4
200
100
-6
10
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
2750
Current [A]
2
FUJI Ceramic Surge Absorbers
Z-TRAP
ENF series 220 to 680V (Varistor voltage)
Transient V-I characteristic curves
5000
4000
3000
(ENF511D10A to ENF681D10A)
Max. idle current
Max. clamping voltage
2000
ENF681D10A
ENF621D10A
Voltage [V]
ENF511D10A
1000
900
800
700
600
500
400
300
ENF511D10A
ENF621D10A
ENF681D10A
200
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
2500
Current [A]
Transient V-I characteristic curves
2000
(ENF221D14A to ENF471D14A)
Max. idle current
Max. clamping voltage
ENF471D14A
1000
900
800
700
600
500
400
Voltage [V]
300
200
14A
471D
ENF
ENF271D14A
ENF241D14A
ENF221D14A
14A
271D
ENF
14A
241D
ENF
14A
221D
ENF
100
90
80
70
60
50
40
-6
10
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
5500
Current [A]
Transient V-I characteristic curves
5000
4000
3000
2000
ENF681D14A
ENF621D14A
ENF511D14A
(ENF511D14A to ENF681D14A)
Max. idle current
Max. clamping voltage
Voltage [V]
1000
900
800
700
600
500
400
300
200
-6
10
EN
F 68
1D 1
4A
4A
4A
1D1
EN
F 62
EN
F 51
1D 1
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
4500
Current[A]
3
FUJI Ceramic Surge Absorbers
Z-TRAP
ENF series 220 to 680V (Varistor voltage)
Pulse lifetime ratings
05A series (ENF221D05A to ENF471D05A)
1000
07A series (ENF221D07A to ENF471D07A)
10000
lse 2
pu
1-
100
1000
Rated peak pluse current [A]
Reted peak pulse current [A]
l se
pu
1-
10
10
10
10
3
4
2
2
10
10
2
10
10
5
10
6
100
10
3
10
4
10
5
10
6
1
10
0.1
20
100
1000
10000
1
20
100
1000
10000
Impulse duration [us]
Impulse duretion [us]
10A series (ENF221D10A to ENF471D10A)
10000
14A series (ENF221D14A to ENF471D14A)
10000
1-
pu
lse
e
ls
pu
1-
1000
1000
2
Rated peak pulse current [A]
Rated peak pulse current [A]
10
10
2
10
2
10
10
2
100
10
100
3
3
10
4
10
5
10
4
10
5
10
6
10
6
10
10
1
20
100
1000
10000
1
20
100
1000
10000
Impulse duration [us]
Impulse duration [us]
4
FUJI Ceramic Surge Absorbers
Z-TRAP
ENF series 220 to 680V (Varistor voltage)
10A series (ENF511D10A to ENF681D10A)
10000
10000
14A series (ENF511D14A to ENF681D14A)
1-
pu
lse
1000
1000
2
e
ls
pu
1-
Rated peak pulse current [A]
Rated peak pulse current [A]
10
10
2
100
10
10
10
2
10
2
3
4
100
10
3
10
4
10
5
10
5
10
6
10
6
10
10
1
1
20
100
1000
10000
20
100
1000
10000
Impulse duration [us]
Impulse duration [us]
5
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