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MERSEN A4J70 Fast-Acting Bolt-On Fuse - Fast-Acting Bolt-On Fuses
MERSENFast-Acting Bolt-On Fuses

MERSEN A4J70 Fast-Acting Bolt-On Fuse

The MERSEN A4J Series is a fast-acting bolt-on fuse, Class J, with a blade body. It is rated for 70 A at 600 V AC and 300 V DC, and is non-indicating (MPN A4J70).

SKU 3G-OTH-25035

Brand
MERSEN
Item
A4J70 Fast-Acting Bolt-On Fuse
Part Number
A4J70
Category
Fast-Acting Bolt-On Fuses
Available to Order
Also known as:A4J70MERSEN
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Technical Specifications

MERSEN
Manufacturer Part Number
A4J70
Series
A4J
Type
Class J, Blade Body, Fast-Acting, 70 A, Non-Indicating
AC
600 V
DC
300 V

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

Product Description

The MERSEN A4J Series is a fast-acting bolt-on fuse, Class J, with a blade body. It is rated for 70 A at 600 V AC and 300 V DC, and is non-indicating (MPN A4J70).

Frequently Asked Questions

What is the MERSEN A4J70 fuse used for?

The MERSEN A4J70 is a fast-acting, Class J bolt-on fuse used for overcurrent protection in industrial equipment, motor control centers, and panelboards. It protects circuits rated up to 70 A at 600 V AC or 300 V DC, and its non-indicating design suits applications where visual blown-fuse indication is not required.

What are the specifications of the MERSEN A4J70 fuse?

The MERSEN A4J70 is a Class J, fast-acting, blade-body fuse rated for 70 A at 600 V AC and 300 V DC. It is non-indicating and part of the A4J series. The manufacturer part number is A4J70. This fuse is designed for bolt-on mounting and provides reliable overcurrent protection in industrial circuits.

Where to buy MERSEN A4J70 fuses worldwide?

3G Electric supplies the MERSEN A4J70 fuse worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source genuine MERSEN components to support your maintenance and production needs.

How to select the correct MERSEN A4J70 fuse for an application?

To select the MERSEN A4J70, verify your circuit's voltage (600 V AC or 300 V DC max) and continuous current (70 A). Ensure the fuse holder accepts Class J blade-body fuses. For fast-acting protection, confirm the application requires no time delay. Always consult the equipment manual and follow local electrical codes.

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.
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MERSEN Products

3G Electric supplies MERSEN fast-acting 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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