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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 750 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, 750 A, 600 V AC

The MERSEN A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY750) is a 750 A, 600 V AC, 300 V DC industrial fuse. It features a bolt-on body and time-delay operation for overcurrent protection.

SKU 3G-OTH-26549

Brand
MERSEN
Item
Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 750 A, 600 V AC
Category
Time-Delay Bolt-On Fuses
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

MERSEN
Manufacturer Part Number
A4BY750
Series
A4BY
Type
A4BY Series, Bolt-On Body, Time-Delay, 750 A
AC
600 V
DC
300 V

Technical Documents

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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 A4BY750) is a 750 A, 600 V AC, 300 V DC industrial fuse. It features a bolt-on body and time-delay operation for overcurrent protection.

Frequently Asked Questions

What is the MERSEN A4BY750 fuse used for?

The MERSEN A4BY750 is a 750 A, 600 V AC, 300 V DC Class L time-delay bolt-on fuse used for overcurrent protection in industrial power distribution, motor circuits, and feeder applications where high fault currents and inrush loads occur.

What are the specifications of the MERSEN A4BY750 fuse?

The MERSEN A4BY750 is a 750 A, 600 V AC, 300 V DC Class L time-delay bolt-on fuse from the A4BY series. It features a bolt-on body for secure mounting and time-delay operation to handle temporary inrush without nuisance opening.

Where to buy the MERSEN A4BY750 fuse worldwide?

3G Electric supplies the MERSEN A4BY750 fuse worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this A4BY series fuse.

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

Select the MERSEN A4BY fuse based on continuous load current (750 A for this model), system voltage (600 V AC or 300 V DC), and available fault current. Ensure the bolt-on body matches your fuse holder. Consult a qualified engineer for coordination studies.

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, 800 A, 600 V AC, 300 V DC (MPN A4BY800)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 800 A, 600 V AC, 300 V DC (MPN A4BY800)
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, 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)
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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, 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, 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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