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MERSEN FUSE L TD FUSE 600V 2500A A4BQ A4BQ2500
Class L time-delay fuse rated for 2500A at 600VAC and 500VDC with blade terminals and bolted mounting for industrial applications.
£1,337.03
Why Choose the Mersen A4BQ2500 Class L Fuse?
The Mersen A4BQ2500 is a premium Class L time-delay current-limiting fuse engineered for the protection of high-capacity industrial power distribution systems, service entrance equipment and heavy-duty electrical installations. As part of the industry-leading Mersen Amp-Trap 2000 A4BQ series, it delivers outstanding current limitation while accommodating temporary inrush currents from motors and transformers without nuisance operation.
Rated at 2500 A, 600 V AC and 500 V DC, the A4BQ2500 rapidly interrupts high fault currents while significantly reducing peak let-through current and energy. Its advanced current-limiting technology helps protect switchgear, busbars, transformers, cables and other downstream equipment from costly thermal and mechanical damage.
The fuse incorporates a built-in 4-second time-delay characteristic at 500% of rated current, allowing temporary motor starting, transformer energisation and other equipment inrush currents to pass without unnecessary operation. Its rejection-style Class L construction also helps prevent incorrect fuse replacement, improving both safety and system reliability.
Key Advantages
- Heavy-duty Class L time-delay current-limiting fuse.
- 2500 A current rating for high-capacity industrial installations.
- 600 V AC and 500 V DC voltage ratings.
- 200 kA AC interrupting rating (300 kA self-certified, UL witnessed).
- Built-in 4-second time delay minimises nuisance fuse operation.
- Advanced current-limiting technology reduces damaging fault energy.
Key Features
- Mersen Amp-Trap 2000 A4BQ series.
- 2500 A rated current.
- 600 V AC maximum voltage rating.
- 500 V DC maximum voltage rating.
- Class L rejection-style fuse construction.
- 4-second time-delay characteristic.
- Pure silver fuse links for maximum current limitation.
- Silver-plated copper blade terminals with bolted installation.
Reliable Protection for High-Power Distribution Systems
The Mersen A4BQ2500 provides exceptional protection against overloads and short circuits by limiting peak fault current and let-through energy before damage can occur. This helps extend the service life of switchgear, transformers, conductors and other critical electrical infrastructure while improving overall system reliability.
Its integrated time-delay characteristic allows temporary motor and transformer inrush currents to pass normally, making the A4BQ2500 ideal for industrial power distribution systems where dependable protection and selective coordination are essential.
Typical Applications
- Service entrance equipment.
- Industrial switchboards.
- Main distribution and feeder circuits.
- Motor control centres.
- Transformer protection.
- Industrial power distribution systems.
- Circuit breaker back-up protection.
- UPS DC links and battery disconnect applications.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 2500 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | A4BQ2500 | |
| Description | Fuse A4BQ - Class L - Time-Delay 600VAC 500VDC 2500A Blade Amp-Trap 2000® | |
| EAN/UPC Code | 782001930134 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 2500 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class L | |
| Speed/Characteristic | Time Delay | |
| Mounting | Bolted | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 114.3 mm | |
| Product Length | 273 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 6.5363 kg | |
| Sell Pack Width | 128.5 mm | |
| Sell Pack Length | 298.4 mm | |
| Sell Pack Height | 117.3 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 6.2233 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4BQ2500 used for?
The Mersen A4BQ2500 protects industrial power distribution systems, service entrance equipment, transformers, large motors and feeder circuits against overloads and short circuits.
What is the current rating of the A4BQ2500?
The Mersen A4BQ2500 has a rated current of 2500 A.
What voltage is the A4BQ2500 rated for?
The fuse is rated for applications operating at up to 600 V AC and 500 V DC.
Why does the A4BQ2500 include a time-delay feature?
The built-in 4-second time delay allows temporary motor and transformer inrush currents to pass without nuisance fuse operation while maintaining rapid protection against sustained overloads and fault currents.
Where is the A4BQ2500 typically installed?
The A4BQ2500 is commonly installed in service entrance equipment, industrial switchboards, feeder circuits and compatible Class L fuse installations.
Trusted Industrial Circuit Protection
Mersen Amp-Trap 2000 Class L fuses are trusted by electrical engineers, panel builders and industrial facilities worldwide for dependable protection of high-capacity electrical distribution systems.
