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MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC - Time-Delay Bolt-On Fuses
MERSENTime-Delay Bolt-On Fuses

MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC

The MERSEN A4BQ Series Class L Time-Delay Bolt-On Fuse (MPN A4BQ900) is a 900 A, 600 V AC, 500 V DC industrial fuse. It features a bolt-on body and time-delay operation for overcurrent protection.

SKU 3G-OTH-27669

Brand
MERSEN
Item
Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC
Category
Time-Delay Bolt-On Fuses
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Technical Specifications

MERSEN
Manufacturer Part Number
A4BQ900
Series
A4BQ
Type
A4BQ Series, Bolt-On Body, Time-Delay, 900 A
AC
600 V
DC
500 V

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MERSEN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MERSEN A4BQ Series Class L Time-Delay Bolt-On Fuse (MPN A4BQ900) is a 900 A, 600 V AC, 500 V DC industrial fuse. It features a bolt-on body and time-delay operation for overcurrent protection.

Frequently Asked Questions

What is the MERSEN A4BQ900 fuse used for?

The MERSEN A4BQ900 is a 900 A, 600 V AC, 500 V DC Class L time-delay bolt-on fuse used for overcurrent protection in industrial power distribution, motor circuits, and feeder applications. Its time-delay characteristic allows it to withstand temporary inrush currents without nuisance opening.

What are the specifications of the MERSEN A4BQ900 fuse?

The MERSEN A4BQ900 is a Class L, A4BQ Series, bolt-on body, time-delay fuse rated 900 A, 600 V AC, and 500 V DC. The manufacturer part number is A4BQ900. It provides reliable overcurrent protection in high-current industrial circuits.

Where to buy MERSEN A4BQ900 fuses worldwide?

3G Electric supplies the MERSEN A4BQ900 fuse worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this Class L time-delay bolt-on fuse.

How to select the right MERSEN A4BQ900 fuse for an application?

To select the MERSEN A4BQ900, verify your system voltage does not exceed 600 V AC or 500 V DC, and the continuous load current is at or below 900 A. The time-delay feature suits motor or transformer circuits with high inrush. Always consult the manufacturer's data sheet for coordination and interrupting rating.

Used in

Common applications for MERSEN
Power electronics protection — MERSEN A70Q series semiconductor fuses in variable frequency drives for motor control.
Surge protection for industrial panels — MERSEN STP480D07 SPDs in three-phase 480V AC distribution boards.
Control circuit overcurrent protection — MERSEN ATM series midget fuses in PLC and instrumentation cabinets.
Power distribution in manufacturing — MERSEN FSPDB4A finger-safe blocks in motor control centers for wire management.
DC bus protection in renewable energy — MERSEN A30QS series fuses in solar inverter DC inputs.
High-voltage semiconductor protection — MERSEN A70Q series fuses in welding equipment power supplies.

MERSEN Products

3G Electric supplies MERSEN time-delay bolt-on fuses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.8 kA, 600 V AC, 500 V DC (MPN A4BQ1800)
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MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.8 kA, 600 V AC, 500 V DC (MPN A4BQ1800)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 800 A, 600 V AC, 500 V DC (MPN A4BQ800)
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MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 800 A, 600 V AC, 500 V DC (MPN A4BQ800)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.4 kA, 600 V AC, 500 V DC (MPN A4BQ1400)
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MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.4 kA, 600 V AC, 500 V DC (MPN A4BQ1400)
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MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1 kA, 600 V AC, 500 V DC (MPN A4BQ1000)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.35 kA, 600 V AC, 500 V DC (MPN A4BQ1350)
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MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.35 kA, 600 V AC, 500 V DC (MPN A4BQ1350)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.2 kA, 600 V AC, 500 V DC (MPN A4BQ1200)
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MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.2 kA, 600 V AC, 500 V DC (MPN A4BQ1200)

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