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A4BQ Series / Class L / Time Delay

Put the highest current-limitation at your service - Amp-trapĀ® 2000 A4BQ fuses are 20% more current limiting than any other Class L fuse on the market. When correctly coordinated, they bring a superior level of protection to service entrance equipment. Downstream circuit components have maximum protection against short circuit let-thru current. A4BQ's built-in, 4-second time delay characteristic (at 500% of rated current) accommodates harmless inrush currents with no nuisance opening.

Ferraz's A4BQ is the industry's most current-limiting Class L fuse!

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Features

  • Fastest operation under short circuit conditions: Let-thru currents are typically 20% lower, with a corresponding let-thru energy (clearing I2t) up to 40% lower than the next fastest Class L fuse
  • Time delay for high inrush loads such as motors and transformers, without nuisance opening
  • 300kA interrupting rating - self-certified, UL witnessed tests
  • Most current limiting for lowest peak let-thru current; even at fault currents up to 300kA
  • Pure silver links ensure lowest let-thru current and longer fuse life
  • Easy 2-to-1 selectivity for prevention of nuisance shutdowns and "blackouts"
  • Rejection-style design prevents replacement errors
  • High-visibility orange label gives instant recognition
  • Reduced inventory because A4BQ can replace all older types of Class L fuses now in service
  • Metal embossed date and catalog number for traceability and lasting identification
  • Fiberglass body provides dimensional stability in harsh industrial settings
  • High grade silica filler ensures fast arc quenching
Ratings
  • AC: 600VAC, 200kA I.R.
    (100-600A ratings are non-listed)
  • AC: 500VDC, 100kA I.R.
    (601 to 3000A)
Approvals
  • UL Listed to Standard 248-10
  • DC Listed to UL Standard 198L
  • CSA Certified to Standard C22.2 No.248.10
  • IEC 269-2-1
  • Some Ratings RoHS Compliant
Applications
  • Mains, Feeders
  • Large Motors
  • Lighting, Heating & General Loads
  • Circuit Breaker Back-up
  • DC Rated: UPS DC Links, Battery Disconnects, Other DC Applications

Ferraz A4BQ Series Fuse Selection

AMPERE RATING CATALOG NUMBER   AMPERE RATING CATALOG NUMBER   AMPERE RATING CATALOG NUMBER   AMPERE RATING CATALOG NUMBER
100 A4BQ100   500 A4BQ500   1000 A4BQ1000   2000 A4BQ2000
150 A4BQ150   600 A4BQ600   1200 A4BQ1200   2500 A4BQ2500
200 A4BQ200   601 A4BQ601   1350 A4BQ1350   2501 A4BQ2501
250 A4BQ250   650 A4BQ650   1400 A4BQ1400   3000 A4BQ3000
300 A4BQ300   700 A4BQ700   1500 A4BQ1500   3500 A4BQ3500
350 A4BQ350   750 A4BQ750   1600 A4BQ1600   3800 A4BQ3800
400 A4BQ400   800 A4BQ800   1800 A4BQ1800   4000 A4BQ4000
450 A4BQ450   900 A4BQ900   1900 A4BQ1900   5000 A4BQ5000
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