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MERSEN A4BQ900 Class L Time-Delay Bolt-On Fuse, 900 A, 600 V AC, 500 V DC - Time-Delay Bolt-On Fuses
MERSENTime-Delay Bolt-On Fuses

MERSEN A4BQ900 Class L Time-Delay Bolt-On Fuse, 900 A, 600 V AC, 500 V DC

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
A4BQ900 Class L Time-Delay Bolt-On Fuse, 900 A, 600 V AC, 500 V DC
Part Number
A4BQ900
Category
Time-Delay Bolt-On Fuses
Available to Order
Also known as:A4BQ900MERSEN
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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
Industrial control panels — Mersen USCC1 and USCC2 UL Class CC fuse blocks for DIN rail mounting and finger-safe branch circuit protection.
Motor starters — Mersen ATQ time-delay fuses and DAR0 R-rated fuses for motor overload and short-circuit protection.
Power supplies and instrumentation — Mersen GGM and GSB fast-acting cylindrical fuses for overcurrent protection in compact electronic circuits.
DC systems — Mersen A30QS very-fast-acting square fuses rated 300 V DC for semiconductor and DC equipment protection.
Medium-voltage distribution — Mersen DAR0 R-rated fuses rated 5.08 kV AC for general-purpose overcurrent protection with visual indication.
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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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