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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.

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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      
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