A4BY
Class L
Count on the high interrupting rating of our most widely
used class L fuse
When it comes to protecting service entrance equipment, feeder circuits, and
circuit breakers, A4BY fuses are the industry’s favorite. The A4BY is a 100% rated
device and may be applied at continuous currents up to its ampere rating. A 4-second
minimum time-delay at 500% rating allows the A4BY to pass normal current surges
and to coordinate with ground fault relays.
Features/Benefits:
•
Unique dimensions prevent replacement by other fuse classes
•
Blade stamped catalog numbers for permanent identification
•
Glass melamine body and plated terminals provide superior reliability in
harsh environments
Highlights:
•
•
•
•
Current-limiting
4-second time-delay
DC ratings
Uniform characteristics in all
ampere ratings
Applications:
•
•
•
•
•
•
Mains, feeders
Circuit breakers
Load centers
Panelboards
Switchboards
Metering centers
Ratings:
Volts
Amps
IR
: 600VAC
: 300VDC
: 200 to 6,000A (AC)
: 200 to 2,500A (DC)
: 200kA.I.R. AC
: 100kA I.R. DC
Approvals:
•
UL listed to standard 248-10
•
CSA certified to standard C22.2
•
Self-certified for DC per UL248
(601-6000A)
No. 248.10 (601-6000A)
(601-6000A) File E2137
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A4BY
Class L
Catalog Numbers (amps)
A4BY200
A4BY250
A4BY300
A4BY350
A4BY400
A4BY450
A4BY500
A4BY600
A4BY601
A4BY650
A4BY700
A4BY750
A4BY800
Note: For optional blown fuse trigger indicator add “-TI” to the end of part number.
Example: A4BY1600-TI. Consult factory for availability.
A4BY801
A4BY900
A4BY1000
A4BY1100
A4BY1200
A4BY1201
A4BY1350
A4BY1400
A4BY1500
A4BY1600
A4BY1601
A4BY1800
A4BY2000
A4BY2001
A4BY2200
A4BY2500
A4BY3000
A4BY3001
A4BY3500
A4BY4000
A4BY4001
A4BY4500
A4BY5000
A4BY6000
Recommended Fuse Blocks
for Amp-Trap
®
Class L Fuses
Fuse
Ampere
Rating
100-800
801-1200
Catalog Number
600V or Less
3-Pole
P48F
P412F
Catalog number P48F is UL recognized
Catalog number P412F is self-certified
A variety of pole configurations and
termination provisions are available. Refer
to Section H for details.
Dimensions
Ampere
Rating
200-600
601-800
801-1200
1201-1600
1601-2000
2001-2500
2501-3000
3001-4000
4001-5000
5001-6000
in
8-5/8
8-5/8
10-3/4
10-3/4
10-3/4
10-3/4
10-3/4
10-3/4
10-3/4
10-3/4
A
mm
219
219
273
273
273
273
273
273
273
273
in
2
2-1/2
2-1/2
3
3-1/2
4-1/2
5
5-3/4
6-1/4
7-1/8
B
mm
51
63
63
76
89
114
127
146
159
181
in
5/16
3/8
3/8
7/16
1/2
3/4
3/4
3/4
1
1
C
mm
8
9
9
11
13
19
19
19
25
25
in
1-5/8
2
2
2-3/8
2-3/4
3-1/2
4
4-3/4
5-1/4
5-3/4
D
mm
41
51
51
60
70
89
102
121
133
146
in
2-13/32
2-13/32
3-15/32
3-15/32
3-15/32
3-15/32
3-15/32
3-15/32
3-15/32
3-15/32
E
mm
61
61
88
88
88
88
88
88
88
88
200-800A
801-2000A
2001-3000A
3001-4000A
4001-6000A
For the most current product performance data visit
ep-us.mersen.com
and use catalog search.
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B