- 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
Approvals & Standards
- 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)
- UL listed
