A4J
Fast Acting/Class J
For excellent current-limiting protection
A4J Class J fuses deliver excellent current-limiting protection to a wide variety of
applications. Their unique dimensions prevent the substitution of other fuses with
lower voltage ratings, interrupting ratings, or current-limiting capability.
Features/Benefits:
•
High current limitation for low peak let-thru current
•
Unique dimensions prevent replacement by other fuse classes
•
Fiberglass body provides dimensional stability in harsh industrial
•
Easy-to-read imprint label for quick recognition and replacement
environments
Highlights:
Applications:
•
•
•
•
•
•
•
•
Capacitors
Load centers
Panelboards
Switchboards
Bus duct
Feeder circuits
Circuit breakers
Lighting, heating, and general
loads
•
Fast-acting
•
Very current-limiting
•
DC ratings
Ratings:
Volts
Amps
IR
: 600VAC
: 300VDC
: 1 to 600A
: 200kA I.R. AC
: 100kA I.R. DC
Approvals:
E2137
•
UL listed to standard 248-8 File
•
CSA certified to standard C22.2
•
DC listed to UL 248
•
IEC 269-2-1
no. 248.8
B8
A4J
Fast Acting/Class J
Catalog Numbers (amps)
A4J1
A4J3
A4J6
A4J10
A4J15
A4J20
A4J25
A4J30
A4J35
A4J40
A4J45
A4J50
A4J60
A4J70
A4J75
A4J80
A4J90
A4J100
A4J110
A4J125
A4J150
A4J175
A4J200
A4J225
A4J250
A4J300
A4J350
A4J400
A4J450
A4J500
A4J600
Recommended Fuse Blocks
With Box Connectors for
Amp-Trap
®
Class J Fuses
Ampere
Rating
0-30
31-60
61-100
101-200
201-400
401-600
600V or Less
1-Pole
US3J1I
US6J1I
61036J
62001J
64031J
6631J
3-Pole
US3J3I
US6J3I
61038J
62003J
64033J
A variety of pole configurations and
termination provisions are available. Refer to
Section H for details.
Dimensions
Ampere
Rating
1-30
31-60
61-100
101-200
201-400
401-600
in
2-1/4
2-3/8
4-4/8
5-3/4
7-1/8
8
A
mm
57
60
117
146
181
203
in
13/16
1-1/16
1-1/8
1-5/8
2-1/8
2-1/2
B
mm
21
27
29
41
54
64
in
-
-
1/8
3/16
1/4
3/8
C
mm
-
-
3.2
4.8
6.3
9.5
in
-
-
3/4
1-1/8
1-5/8
2
D
mm
-
-
19
29
41
51
in
-
-
1
1-3/8
1-7/8
2-1/8
E
mm
-
-
25
35
48
54
in
-
-
3-5/8
4-3/8
5-1/4
6
F
mm
-
-
92
111
133
152
in
-
-
3/8
3/8
17/32
11/16
G
mm
-
-
10
10
13
18
in
-
-
9/32
9/32
13/32
17/32
H
mm
-
-
7
7
10
13
1-60A
61-600A
For the most current product performance data visit
ep-us.mersen.com
and use catalog search.
B9
B
Fuse
Catalog Number
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