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.
*
1
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.
*
2
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.
FUJI Ceramic Surge Absorbers
Z-TRAP
ENF series
220 to 680V (Varistor voltage)
Operating ambient temperature: -40C to +85C
Storage temperature: -40C to +125C
*
3
Transient peak current (Itm)
The peak current rating, Itm, is based on 8/20s 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 8/20s impulse
current applied.
ENF221D05A
140
180
6.5
0.1
700
220
198
242
380
5
170
ENF221D07A
13.5
0.25
1350
360
10
350
ENF221D10A
28.0
0.4
2750
360
25
700
ENF221D14A
55.0
0.6
5500
360
50
1400
ENF241D05A
150
200
7.5
0.1
700
240
216
264
415
5
170
ENF241D07A
15.0
0.25
1350
395
10
350
ENF241D10A
30.0
0.4
2750
395
25
700
ENF241D14A
60.0
0.6
5500
395
50
1300
ENF271D05A
175
225
8.0
0.1
700
270
247
303
475
5
150
ENF271D07A
17.0
0.25
1350
455
10
300
ENF271D10A
35.0
0.4
2750
455
25
600
ENF271D14A
70.0
0.6
5500
455
50
1200
ENF471D05A
300
385
15.0
0.1
700
470
423
517
810
5
80
ENF471D07A
30.0
0.25
1350
775
10
170
ENF471D10A
60.0
0.4
2750
775
25
350
ENF471D14A
125.0
0.6
5500
775
50
700
ENF511D10A
320
410
67.0
0.4
2500
510
459
561
845
25
300
ENF511D14A
136.0
0.6
4500
845
50
650
ENF621D10A
385
505
67.0
0.4
2500
620
558
682
1025
25
270
ENF621D14A
136.0
0.6
4500
1025
50
550
ENF681D10A
420
560
67.0
0.4
2500
680
612
748
1120
25
250
ENF681D14A
136.0
0.6
4500
1120
50
500
Device
Maximum rating
Characteristics
type
Applied voltage *
1
Transient
Nominal varistor voltage *
4
Max. clamping *
5
Typical
RMS
DC
Energy *
2
Average
Peak *
3
voltage @test
capaci-
50Hz/60Hz
power
current
current
tance
dissipation (8/20s)
(8/20s)
Tolerance
Vacm
Vdcm
Wtm
Ptam
Itm
Vnom
Min.
Max
Vc
Ip
f=1kHz
[Volts]
[Volts]
[Joules]
[Watts]
[Amps]
[Volts]
[Volts]
[Volts]
[Volts]
[Amps]
[pF]
Quality is our message
Quality is our message
Quality is our message
Quality is our message
Quality is our message
Ratings and characteristics
1
Characteristic curves (Typical)
FUJI Ceramic Surge Absorbers
Z-TRAP
ENF series 220 to 680V (Varistor voltage)
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
40
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1000
2000
Max. clamping voltage
Max. idle current
ENF221D05A
ENF22
1D05A
ENF24
1D05A
ENF271D05A
ENF47
1D05A
ENF471D05A
ENF27
1D05A
ENF241D05A
(ENF221D05A to ENF471D05A)
Transient V-I characteristic curves
700
V
o
lt
a
ge [
V
]
Current [A]
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
40
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1000
2000
Max. clamping voltage
Max. idle current
ENF221D07A
ENF22
1D07A
ENF24
1D07A
ENF271D07A
ENF47
1D07A
ENF471D07A
ENF27
1D07A
ENF241D07A
(ENF221D07A to ENF471D07A)
Transient V-I characteristic curves
1350
Vo
l
t
age
[V]
Current [A]
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
100
200
300
400
500
600
700
800
900
1000
2000
Max. clamping voltage
Max idle current
ENF221D10A
ENF2
21D1
0A
ENF2
41D1
0A
ENF271D10A
ENF4
71D10
A
ENF471D10A
ENF2
71D10
A
ENF241D10A
(ENF221D10A to ENF471D10A)
Transient V-I characteristics curve
2750
Vol
t
age [V
]
Current [A]
2
1. This Catalog contains the product specifications, characteristics, data, materials, and structures as of May 2005.
The contents are subject to change without notice for specification changes or other reasons. When using a product listed in this
Catalog, be sure to obtain the latest specifications.
2. All applications described in this Catalog exemplify the use of Fuji's products for your reference only. No right or license, either
express or implied, under any patent, copyright, trade secret or other intellectual property right owned by Fuji Electric Device
Technology Co., Ltd. is (or shall be deemed) granted. Fuji Electric Device Technology Co., Ltd. makes no representation or
warranty, whether express or implied, relating to the infringement or alleged infringement of other's intellectual property rights which
may arise from the use of the applications described herein.
3. Although Fuji Electric Device Technology Co., Ltd. is enhancing product quality and reliability, a small percentage of semiconductor
products may become faulty. When using Fuji Electric semiconductor products in your equipment, you are requested to take
adequate safety measures to prevent the equipment from causing a physical injury, fire, or other problem if any of the products
become faulty. It is recommended to make your design fail-safe, flame retardant, and free of malfunction.
4. The products introduced in this Catalog are intended for use in the following electronic and electrical equipment which has
normal reliability requirements.
Computers
OA equipment
Communications equipment (terminal devices)
Measurement equipment
Machine tools
Audiovisual equipment
Electrical home appliances
Personal equipment
Industrial robots etc.
5. If you need to use a product in this Catalog for equipment requiring higher reliability than normal, such as for the equipment listed
below, it is imperative to contact Fuji Electric Device Technology Co., Ltd. to obtain prior approval. When using these products for
such equipment, take adequate measures such as a backup system to prevent the equipment from malfunctioning even if a Fuji's
product incorporated in the equipment becomes faulty.
Transportation equipment (mounted on cars and ships)
Trunk communications equipment
Traffic-signal control equipment
Gas leakage detectors with an auto-shut-off feature
Emergency equipment for responding to disasters and anti-burglary devices
Safety devices
6. Do not use products in this Catalog for the equipment requiring strict reliability such as (without limitation)
Space equipment
Aeronautic equipment
Nuclear control equipment
Submarine repeater equipment
Medical equipment
7. Copyright
1996-2005 by Fuji Electric Device Technology Co., Ltd. All rights reserved.
No part of this Catalog may be reproduced in any form or by any means without the express permission of Fuji Electric Device
Technology Co., Ltd.
8. If you have any question about any portion in this Catalog, ask Fuji Electric Device Technology Co., Ltd. or its sales agents before
using the product.
Neither Fuji Electric Device Technology Co., Ltd. nor its agents shall be liable for any injury caused by any use of the products not in
accordance with instructions set forth herein.
WARNING
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