Back
Where to buy Contact us
PHP-A4BQ-Photos

A4BQ - Class L - Time-Delay

Approvals & Standards
A4BQ (100-6000)
UL listed to standard 248-10 File E2137
DC listed to UL standard 248 (100-2000A)
CSA certified to standard C22.2 No. 248.10 (601-6000A)
A4BQ (100-6000) - TA
UL listed

Amp-Trap 2000 A4BQ fuses are 20 percent 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 500percent of rated current) accommodates harmless inrush currents with no nuisance opening.

Amp-Trap 2000 A4BQ fuses are 20 percent 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 500percent of rated current) accommodates harmless inrush currents with no nuisance opening.

Key features & benefits

  • Fastest operation under short circuit conditions: Let-thru currents are typically 20 percent 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

  • Recommended for Arc Flash energy reduction

  • 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 brand 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

  • Optional mechanical TA indicator (100-6000A). Please contact factory for special trigger actuator

Applications

  • Mains

  • Feeders

  • Large motors

  • Lighting, heating & general loads

  • Circuit breaker back-up

  • DC rated: UPS DC links, battery disconnects, other DC applications

Technical Specifications

Frequency (Hz) 50/60 Hz
Amperage Range 100 to 600 A
Fuse Class Class L
Speed/Characteristic Time Delay
UL Category Code JDDZ

Reference Finder

66 references in this series

Scroll

Item number Ampere rating Fuse size Clearing I2t At Rated Voltage Indication System Product weight
A4BQ750 See product
 750A - - No 1.71kg
A4BQ750-TA See product
 750A - - Yes 1.7645kg
A4BQ800 See product
 800A - - No 1.71kg
A4BQ800-TA See product
 800A - - Yes 1.7645kg
A4BQ900 See product
 900A - - No 1.9459kg
A4BQ900-TA See product
 900A - - Yes 2.1546kg
Back to top