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FUJI Ceramic Surge Absorbers
Z-TRAP
ENF series
220 to 680V (Varistor voltage)
Features
路 Flame-resistant
Suppress combustion and smoking after a malfunction caused by larger
surge than the specified value
路 Environment-friendly materials
Adopts newly developed halogen-free resin mold and the Pb-free plated
lead wires
路 High reliability
Greatly improved heat-cycle resistance
路 Small size and high performance
路 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
50Hz/60Hz
Characteristics
Nominal varistor voltage *
4
Peak *
3
Max. clamping *
5
voltage @test
current
(8/20碌s)
Typical
capaci-
tance
power
current
dissipation (8/20碌s)
Tolerance
Vdcm
[Volts]
Wtm
[Joules]
Ptam
[Watts]
Itm
[Amps]
Vnom
[Volts]
Min.
[Volts]
Max
[Volts]
Vacm
[Volts]
Vc
[Volts]
Ip
[Amps]
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掳C to +85掳C
Storage temperature: -40掳C to +125掳C
*
3
Transient peak current (Itm)
The peak current rating, Itm, is based on 8/20碌s test impulse wave
form. This peak current is the maximum peak current at which the
nominal varistor voltage shift dose not exceed 卤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 8/20碌s 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 卤10% of
the initial value.
1
1
2
3
4
5
6
7
