General Purpose US Fuses
General Purpose US Fuses
GPUS37
American Power Fuses
AMP-TRAP®
A4BY (Class L)
12/04
Count on the high interrupting rating
of our most widely-used class L fuse
When it comes to protecting service entrance equip-
ment, feeder circuits, and circuit breakers, A4BY fuses
have been the industry’s favorite. The A4BY is a 100%
rated device and may be applied at continuous cur-
rents up to its ampere rating. A 4-second minimum
time delay at 500% rating allows the A4BY to pass nor-
mal 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
Ratings
AC: 200 to 6,000A
600VAC,200kA I.R.
DC: 200 to 2500A
300VDC, 100kA I.R.
Highlights
• Current-Limiting
• 4-Second Time Delay
• DC Ratings
• Uniform Characteristics in all Ampere Ratings
Applications
• Mains, Feeders
• Circuit Breakers
• Loadcenters
• Panelboards
• Switchboards
• Metering Centers
Approvals
• UL Listed to Standard 248-10
(601-6000A)
• CSA Certified to Standard C22.2
No. 248.10 (601-6000A)
• DC Tested to UL 198L limits (601-6000A)
Indicators:
Optional built-in fuse indicators (-TI) are
available. Consult factory.
General Purpose US Fuses
General Purpose US Fuses
GPUS38
American Power Fuses
AMP-TRAP®
A4BY (Class L)
12/04
200-800A
Standard Fuse Ampere Ratings
801-2000A
3001-4000A
2001-3000A 4001-6000A
Safety Note:
Class L fuses are dimensioned for one-way interchangeability.
A Class L fuse of any lower ampere rating can be substituted for a given Class L fuse.
Ampere Catalog Ref. Ampere Catalog Ref. Ampere Catalog Ref.
Rating Number Number Rating Number Number Rating Number Number
200 A4BY200 P217823 801 A4BY801 K211172 2000 A4BY2000 A218339
250 A4BY250 P222584 900 A4BY900 C211694 2001 A4BY2001 M218856
300 A4BY300 J201948 1000 A4BY1000 X201431 2500 A4BY2500 L200892
350 A4BY350 Y212725 1100 A4BY1100 H211170 3000 A4BY3000 J211171
400 A4BY400 Z213738 1200 A4BY1200 A211692 3001 A4BY3001 H212205
500 A4BY500 T216286 1201 A4BY1201 X212724 3500 A4BY3500 H213240
600 A4BY600 Q217824 1350 A4BY1350 G213239 4000 A4BY4000 G214251
601 A4BY601 C219376 1400 A4BY1400 Y213737 4001 A4BY4001 J214759
650 A4BY650 Z219902 1500 A4BY1500 H214758 5000 A4BY5000 V216793
700 A4BY700 Q222585 1600 A4BY1600 L215267 6000 A4BY6000 N218857
750 A4BY750 M200893 1601 A4BY1601 T216792
800 A4BY800 Z201433 1800 A4BY1800 K217313
Ampere A B C D E
Rating In. mm In. mm In. mm In. mm In. mm
200-600* 8-5/8 219 2 51 5/16 8 1-5/8 41 2-13/32 61
601-800 8-5/8 219 2-1/2 63 3/8 9 2 51 2-13/32 61
801-1200 10-3/4 273 2-1/2 63 3/8 9 2 51 3-15/32 88
1201-1600 10-3/4 273 3 76 7/16 11 2-3/8 60 3-15/32 88
1601-2000 10-3/4 273 3-1/2 89 1/2 13 2-3/4 70 3-15/32 88
2001-2500 10-3/4 273 4-1/2 114 3/4 19 3-1/2 89 3-15/32 88
2501-3000 10-3/4 273 5 127 3/4 19 4 102 3-15/32 88
3001-4000 10-3/4 273 5-3/4 146 3/4 19 4-3/4 121 3-15/32 88
4001-5000 10-3/4 273 6-1/4 159 1 25 5-1/4 133 3-15/32 88
5001-6000 10-3/4 273 7-1/8 181 1 25 5-3/4 146 3-15/32 88
Dimensions
General Purpose US Fuses
General Purpose US Fuses
GPUS39
American Power Fuses
AMP-TRAP®
A4BY (Class L)
12/04
TIME IN SECONDS
CURRENT IN AMPERES
MAXIMUM INSTANTANEOUS PEAK LET-THRU AMPERES
A4BY 200 to 6000
MELTING TIME – CURRENT DATA, 600V FUSES
Peak Let-Thru Current Data – A4BY 300 to 6000, 600 Volts AC
AVAILABLE CURRENT IN RMS SYMMETRICAL AMPERES
