Mersen, formerly Ferraz Shawmut A4BY Catalog Page

AMP-TRAP

®

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 have been 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

B

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

➤

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.

Approvals

UL Listed to Standard

➤

248-10 (601-6000A)
File E2137

CSA Certified to

➤

Standard C22.2
No. 248.10 (601-6000A)

Ferraz Shawmut Certified

➤

for DC per UL248
(601-6000A)

Indicators

Optional built-in fuse indicators (-TI) are available. Consult factory.

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AMP-TRAP

®

CLASS L FUSES A4BY

Standard Fuse Ampere Ratings, Catalog Numbers

AMPERE CATALOG AMPERE CATALOG AMPERE CATALOG

RATING NUMBER RATING NUMBER RATING NUMBER

200 A4BY200 801 A4BY801 2000 A4BY2000
250 A4BY250 900 A4BY900 2001 A4BY2001
300 A4BY300 1000 A4BY1000 2200 A4BY2200
350 A4BY350 1100 A4BY1100 2500 A4BY2500
400 A4BY400 1200 A4BY1200 3000 A4BY3000
450 A4BY450 1201 A4BY1201 3001 A4BY3001
500 A4BY500 1350 A4BY1350 3500 A4BY3500
600 A4BY600 1400 A4BY1400 4000 A4BY4000
601 A4BY601 1500 A4BY1500 4001 A4BY4001
650 A4BY650 1600 A4BY1600 4500 A4BY4500
700 A4BY700 1601 A4BY1601 5000 A4BY5000
750 A4BY750 1800 A4BY1800 6000 A4BY6000
800 A4BY800

2001-3000A

3001-4000A

200-800A

801-2000A

Dimensions

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

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.

4001-6000A

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