A4BY Series / Class L / 4-Second Time Delay

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.

Product Data

[351 KB]

Brochure

[Not Available]

UL File Card

CSA File Card

Features

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

Ratings

AC: 600VAC, 200kA I.R.
AC: 300VDC, 100kA I.R.
(200 to 2500A - Ferraz Shawmut certified)

Approvals

UL Listed to Standard 248-10
CSA Certified to Standard C22.2 No. 248.10
DC Tested to UL 198L limits (Ferraz Shawmut Certified)
IEC 269-2-1
Some ratings RoHS Compliant

Applications

Mains, Feeders
Circuit Breakers
Loadcenters
Panelboards
Switchboards
Metering Centers

Ferraz A4BY Series Fuse Selection

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