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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 450 A, 600 V AC - Time-Delay Bolt-On Fuses
MERSENTime-Delay Bolt-On Fuses

MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 450 A, 600 V AC

The MERSEN A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY450) is a 450 A, 600 V AC, 300 V DC industrial fuse with a bolt-on body. It is designed for time-delay operation, providing overcurrent protection in…

SKU 3G-OTH-27113

Brand
MERSEN
Item
Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 450 A, 600 V AC
Category
Time-Delay Bolt-On Fuses
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

MERSEN
Manufacturer Part Number
A4BY450
Series
A4BY
Type
A4BY Series, Bolt-On Body, Time-Delay, 450 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 A4BY450) is a 450 A, 600 V AC, 300 V DC industrial fuse with a bolt-on body. It is designed for time-delay operation, providing overcurrent protection in electrical circuits.

Frequently Asked Questions

What is the MERSEN A4BY450 fuse used for?

The MERSEN A4BY450 is a 450 A, 600 V AC, 300 V DC Class L time-delay bolt-on fuse used for overcurrent protection in industrial electrical circuits. It is commonly applied in motor control centers, switchboards, and feeder circuits where high interrupting capacity and delayed response to inrush currents are required.

What are the specifications of the MERSEN A4BY450 fuse?

The MERSEN A4BY450 is a Class L time-delay bolt-on fuse rated 450 A, 600 V AC, and 300 V DC. It is part of the A4BY Series with a bolt-on body design. The manufacturer part number is A4BY450. These specifications ensure reliable overcurrent protection in demanding industrial environments.

Where to buy the MERSEN A4BY450 fuse worldwide?

3G Electric supplies the MERSEN A4BY450 fuse to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this Class L time-delay bolt-on fuse.

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

To select the correct MERSEN A4BY Series fuse, match the voltage rating (600 V AC or 300 V DC) and current rating (450 A for the A4BY450) to your circuit requirements. Ensure the bolt-on body fits your fuse holder. Time-delay fuses are ideal for circuits with motor starting or transformer inrush currents.

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, A4BY Series, Bolt-On Body, Time-Delay, 350 A, 600 V AC, 300 V DC (MPN A4BY350)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 350 A, 600 V AC, 300 V DC (MPN A4BY350)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 4 kA, 600 V AC, 300 V DC (MPN A4BY4000)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 4 kA, 600 V AC, 300 V DC (MPN A4BY4000)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 250 A, 600 V AC, 300 V DC (MPN A4BY250)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 250 A, 600 V AC, 300 V DC (MPN A4BY250)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 600 A, 600 V AC, 300 V DC (MPN A4BY600)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 600 A, 600 V AC, 300 V DC (MPN A4BY600)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 300 A, 600 V AC, 300 V DC (MPN A4BY300)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 300 A, 600 V AC, 300 V DC (MPN A4BY300)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 200 A, 600 V AC, 300 V DC (MPN A4BY200)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 200 A, 600 V AC, 300 V DC (MPN A4BY200)

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