A4BQ - Class L - Time-Delay
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.
Product data sheets
- DS-A4BQ-Class-L-Time-Delay-Mersen
pdf - 110.45 KB
Compliance
- COM-CE-ROHS-Declaration_Class_Type_L-20-0002
pdf - 161.38 KB
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
| Frequency (Hz) | 50/60 Hz |
| Amperage Range | 100 to 600 A |
| Fuse Class | Class L |
| Speed/Characteristic | Time Delay |
| UL Category Code | JDDZ |
| CSA File Number | Class 1422-02 Guide 012636_0 |
| Reach Compliant | Yes |
| Max Operating Temp. | 80 °C |
| Max Storage Temp. | 80 °C |
| Min Storage Temp. | -25 °C |
| Harmonized System | 853610 |
| UL File Number | File E2137 |
Reference Finder
Scroll
| Item number | Ampere rating | Fuse size | Clearing I2t At Rated Voltage | Indication System | Product weight |
|---|---|---|---|---|---|
|
A4BQ400 See product
|
400A | - | - | No | 1.1068kg |
|
A4BQ400-TA See product
|
400A | - | - | Yes | 1.2701kg |
|
A4BQ4000 See product
|
4000A | - | - | No | 1.134kg |
|
A4BQ4000-TA See product
|
4000A | - | - | Yes | 11.6573kg |
|
A4BQ450 See product
|
450A | - | - | No | 1.1068kg |
|
A4BQ450-TA See product
|
450A | - | - | Yes | 1.2701kg |
|
A4BQ500 See product
|
500A | - | - | No | 1.1068kg |
|
A4BQ500-TA See product
|
500A | - | - | Yes | 1.2701kg |
|
A4BQ5000 See product
|
5000A | - | - | No | 14.2882kg |
|
A4BQ5000-TA See product
|
5000A | - | - | Yes | 14.3789kg |
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