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3G Electric
MERSEN A4BY250 Time-Delay Bolt-On Fuse, 250 A, 600 V AC / 300 V DC - Time-Delay Bolt-On Fuses
MERSENTime-Delay Bolt-On Fuses

MERSEN A4BY250 Time-Delay Bolt-On Fuse, 250 A, 600 V AC / 300 V DC

The MERSEN A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY250) is a 250 A, 600 V AC, 300 V DC industrial fuse. This bolt-on body fuse offers time-delay characteristics for handling inrush currents.

SKU 3G-OTH-27080

Brand
MERSEN
Item
A4BY250 Time-Delay Bolt-On Fuse, 250 A, 600 V AC / 300 V DC
Part Number
A4BY250
Category
Time-Delay Bolt-On Fuses
Available to Order
Also known as:A4BY250MERSEN
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Local office
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Phone
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Technical Specifications

MERSEN
Manufacturer Part Number
A4BY250
Series
A4BY
Type
A4BY Series, Bolt-On Body, Time-Delay, 250 A
AC
600 V
DC
300 V

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

Product Description

The MERSEN A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY250) is a 250 A, 600 V AC, 300 V DC industrial fuse. This bolt-on body fuse offers time-delay characteristics for handling inrush currents.

Frequently Asked Questions

What is the MERSEN A4BY250 fuse used for?

The MERSEN A4BY250 is a Class L time-delay bolt-on fuse rated 250 A, 600 V AC, 300 V DC. It protects industrial equipment such as motors, transformers, and feeders from overcurrents while tolerating harmless inrush currents, reducing nuisance blowing.

What are the specifications of the MERSEN A4BY250 fuse?

The MERSEN A4BY250 is a 250 A, 600 V AC, 300 V DC Class L time-delay bolt-on fuse from the A4BY series. It features a bolt-on body design for secure mounting and time-delay characteristics to handle startup surges in heavy industrial circuits.

Where to buy MERSEN A4BY250 fuses worldwide?

You can source the MERSEN A4BY250 fuse through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring reliable supply for your operations.

How to select the correct MERSEN A4BY fuse for an application?

Select the MERSEN A4BY fuse based on system voltage (up to 600 V AC or 300 V DC), continuous current rating (250 A for the A4BY250), and available fault current. Ensure the bolt-on body matches your fuse holder and that time-delay characteristics suit motor or transformer starting loads.

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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