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Mersen

A4BQ Series / Class L / Time Delay

The A4BQ Series / Class L / Time Delay is part of the Mersen (formerly Ferraz Shawmut) general purpose fuses line, distributed by Gross Automation.

A4BQ Series / Class L / Time Delay

Put the highest current-limitation at your service - Amp-trap® 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.

Specifications

SpecificationValue
RatingsAC: 600VAC, 200kA I.R. (100-600A ratings are non-listed); AC: 500VDC, 100kA I.R. (601 to 3000A); 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; Mains, Feeders; Large Motors; Lighting, Heating & General Loads; Circuit Breaker Back-up; DC Rated: UPS DC Links, Battery Disconnects, Other DC Applications
FeaturesTime 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

Features

  • 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)
  • 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
  • Mains, Feeders
  • Large Motors
  • Lighting, Heating & General Loads
  • Circuit Breaker Back-up
  • DC Rated: UPS DC Links, Battery Disconnects, Other DC Applications

Catalog Numbers

AmpsCatalog Number
100A4BQ100+
100A4BQ100-TA+
150A4BQ150+
150A4BQ150-TA+
200A4BQ200+
200A4BQ200-TA+
250A4BQ250+
250A4BQ250-TA+
300A4BQ300+
350A4BQ350+
350A4BQ350-TA+
400A4BQ400+
400A4BQ400-TA+
450A4BQ450+
450A4BQ450-TA+
500A4BQ500+
500A4BQ500-TA+
600A4BQ600+
600A4BQ600-TA+
601A4BQ601+
601A4BQ601-TA+
650A4BQ650+
650A4BQ650-TA+
700A4BQ700+
700A4BQ700-TA+
750A4BQ750+
750A4BQ750-TA+
800A4BQ800+
800A4BQ800-TA+
900A4BQ900+
900A4BQ900-TA+
1000A4BQ1000+
1000A4BQ1000-TA+
1200A4BQ1200+
1200A4BQ1200-TA+
1350A4BQ1350+
1350A4BQ1350-TA+
1400A4BQ1400+
1400A4BQ1400-TA+
1500A4BQ1500+
1500A4BQ1500-TA+
1600A4BQ1600+
1600A4BQ1600-TA+
1800A4BQ1800+
1800A4BQ1800-TA+
1900A4BQ1900+
2000A4BQ2000+
2000A4BQ2000-TA+
2001A4BQ2001-TA+
2200A4BQ2200-TA+
2500A4BQ2500+
2500A4BQ2500-TA+
2501A4BQ2501+
3000A4BQ3000+
3000A4BQ3000-TA+
3500A4BQ3500+
3500A4BQ3500-TA+
3800A4BQ3800+
3800A4BQ3800-TA+
4000A4BQ4000+
4000A4BQ4000-TA+
5000A4BQ5000+
5000A4BQ5000-TA+
6000A4BQ6000+
6000A4BQ6000-TA+

Documentation

Distributing power? Gross Manufacturing, our UL 508A panel shop, builds power distribution and generator panels.