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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 800 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, 800 A, 600 V AC

The MERSEN A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY800) is a bolt-on body fuse rated at 800 A, 600 V AC, and 300 V DC. This time-delay fuse from MERSEN is designed for overcurrent protection in…

SKU 3G-OTH-25872

Brand
MERSEN
Item
Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 800 A, 600 V AC
Category
Time-Delay Bolt-On Fuses
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Technical Specifications

MERSEN
Manufacturer Part Number
A4BY800
Series
A4BY
Type
A4BY Series, Bolt-On Body, Time-Delay, 800 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 A4BY800) is a bolt-on body fuse rated at 800 A, 600 V AC, and 300 V DC. This time-delay fuse from MERSEN is designed for overcurrent protection in industrial electrical systems.

Frequently Asked Questions

What is the MERSEN A4BY800 fuse used for?

The MERSEN A4BY800 is a Class L time-delay bolt-on fuse rated 800 A, 600 V AC, and 300 V DC. It provides overcurrent protection in industrial electrical systems, such as motor circuits, feeders, and switchgear, where high current ratings and time-delay characteristics are required to handle inrush currents.

What are the specifications of the MERSEN A4BY800 fuse?

The MERSEN A4BY800 is a Class L, A4BY Series, bolt-on body, time-delay fuse. Its electrical ratings are 800 A, 600 V AC, and 300 V DC. The manufacturer part number is A4BY800. This fuse is designed for overcurrent protection in industrial applications requiring a time-delay characteristic.

Where to buy the MERSEN A4BY800 fuse worldwide?

3G Electric supplies the MERSEN A4BY800 fuse worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this fuse for your project. We provide competitive pricing and reliable service for international orders.

How to select the correct MERSEN A4BY800 fuse for an application?

To select the MERSEN A4BY800, verify that your system voltage does not exceed 600 V AC or 300 V DC and that the continuous load current is below 800 A. Ensure the fuse holder accommodates a bolt-on body Class L fuse. The time-delay feature is suitable for circuits with high inrush currents, such as motor starters.

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, 700 A, 600 V AC, 300 V DC (MPN A4BY700)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 700 A, 600 V AC, 300 V DC (MPN A4BY700)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 801 A, 600 V AC, 300 V DC (MPN A4BY801)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 801 A, 600 V AC, 300 V DC (MPN A4BY801)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 601 A, 600 V AC, 300 V DC (MPN A4BY601)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 601 A, 600 V AC, 300 V DC (MPN A4BY601)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC, 300 V DC (MPN A4BY900)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC, 300 V DC (MPN A4BY900)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1 kA, 600 V AC, 300 V DC (MPN A4BY1000)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1 kA, 600 V AC, 300 V DC (MPN A4BY1000)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.1 kA, 600 V AC, 300 V DC (MPN A4BY1100)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.1 kA, 600 V AC, 300 V DC (MPN A4BY1100)

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