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MERSEN FUSE 600V 150A L TD FUSE A4BQ150
Reliable, high-capacity circuit protection fuse with 1500A time-delay rating, dual 600VAC/500VDC voltage capability, and robust blade construction for industrial applications.
£620.14
Why Choose the Mersen A4BQ150 Class L Fuse?
The Mersen A4BQ150 is a premium Class L time-delay current-limiting fuse engineered to provide superior protection for industrial power distribution systems, service entrance equipment and high-current electrical installations. Part of the renowned Mersen Amp-Trap 2000 A4BQ series, it combines exceptional current-limiting performance with a controlled time-delay characteristic to protect critical equipment while accommodating temporary inrush currents.
Rated at 150 A, 600 V AC and 500 V DC, the A4BQ150 rapidly interrupts damaging fault currents while minimising peak let-through current and energy. Its integrated 4-second time-delay characteristic at 500% of rated current allows normal motor starting and transformer energisation currents to pass without nuisance operation while maintaining rapid protection against sustained overloads and short circuits.
Designed for demanding industrial applications, the A4BQ150 is widely used in service entrance equipment, switchboards, feeder circuits and motor control centres. Its rejection-style Class L design helps prevent incorrect fuse replacement, improving both safety and system reliability.
Key Advantages
- Industrial Class L time-delay current-limiting fuse.
- 150 A current rating for industrial power distribution.
- 600 V AC and 500 V DC voltage ratings.
- 300 kA AC interrupting capability under UL witnessed testing.
- Built-in 4-second time delay helps prevent nuisance operation during equipment start-up.
- Current-limiting construction reduces damaging fault energy.
Key Features
- Mersen Amp-Trap 2000 A4BQ series.
- 150 A rated current.
- 600 V AC maximum voltage.
- 500 V DC maximum voltage.
- Class L rejection-style current-limiting fuse.
- Time-delay characteristic for motors and transformers.
- Fibreglass body with high-grade silica filler.
- Blade terminals for compatible Class L fuse holders.
Reliable Protection for Industrial Power Distribution
The Mersen A4BQ150 provides exceptional protection against overloads and short circuits in industrial electrical systems. Its advanced current-limiting design minimises peak fault current and let-through energy, helping protect switchgear, transformers, cables and downstream electrical equipment from costly damage.
Its built-in time-delay characteristic allows normal inrush currents associated with motors and transformers while maintaining rapid response to sustained overloads and fault conditions. This improves system reliability and supports selective coordination in critical industrial installations.
Typical Applications
- Service entrance equipment.
- Industrial switchboards.
- Main feeder circuits.
- Motor control centres.
- Transformer protection.
- Heavy industrial power distribution systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 150 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | A4BQ1500 | |
| Description | Fuse A4BQ - Class L - Time-Delay 600VAC 500VDC 1500A Blade Amp-Trap 2000® | |
| EAN/UPC Code | 782001930110 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 1500 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 | 76.2 mm | |
| Product Length | 273 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 2.844 kg | |
| Sell Pack Width | 88.9 mm | |
| Sell Pack Length | 279.4 mm | |
| Sell Pack Height | 82.6 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 2.7079 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4BQ150 used for?
The A4BQ150 protects industrial power distribution systems, service entrance equipment, motors and feeder circuits from overloads and short circuits.
What is the current rating of the A4BQ150?
The Mersen A4BQ150 has a rated current of 150 A.
What voltage is the A4BQ150 rated for?
The fuse is rated for applications up to 600 V AC and 500 V DC.
Why does the A4BQ150 include a time-delay feature?
The built-in time-delay allows temporary motor and transformer inrush currents to pass without nuisance fuse operation while still providing rapid protection against sustained overloads and short circuits.
Where is the A4BQ150 typically installed?
It is commonly installed in service entrance equipment, switchboards, feeder circuits and industrial power distribution systems using compatible Class L fuse holders.
Trusted Industrial Circuit Protection
Mersen Amp-Trap 2000 Class L fuses are trusted worldwide by electrical engineers and industrial facilities for dependable protection of high-capacity electrical distribution systems.
