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MERSEN Semiconductor Fuse: A70QS Series, Fast-Acting, 300 A, 700 V AC, 700 V DC DC Volt Rating - Fast-Acting Bolt-On Fuses
MERSENFast-Acting Bolt-On Fuses

MERSEN Semiconductor Fuse: A70QS Series, Fast-Acting, 300 A, 700 V AC, 700 V DC DC Volt Rating

The MERSEN A70QS Series Semiconductor Fuse is a fast-acting bolt-on fuse designed for AC/DC applications. This model (MPN A70QS300-4IL) is rated at 300 A and 700 V AC/700 V DC, with an indicating feature. It provides…

SKU 3G-OTH-27459

Also listed as: A70QS3004IL · A70QS300 4IL

Brand
MERSEN
Item
Semiconductor Fuse: A70QS Series, Fast-Acting, 300 A, 700 V AC, 700 V DC DC Volt Rating
Category
Fast-Acting 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
A70QS300-4IL
Series
A70QS
Type
Fast-Acting, 300 A, Indicating
AC
700 V
Voltage Type
AC/DC
DC DC Volt Rating
700 V

Technical Documents

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

Product Description

The MERSEN A70QS Series Semiconductor Fuse is a fast-acting bolt-on fuse designed for AC/DC applications. This model (MPN A70QS300-4IL) is rated at 300 A and 700 V AC/700 V DC, with an indicating feature. It provides overcurrent protection for power electronic circuits.

Frequently Asked Questions

What is the MERSEN A70QS300-4IL semiconductor fuse used for?

The MERSEN A70QS300-4IL is a fast-acting bolt-on fuse used for overcurrent protection in power electronic circuits such as drives, inverters, and UPS systems. It handles AC/DC applications up to 700 V and 300 A, with an indicating feature for quick visual identification of a blown fuse.

What are the specifications of the MERSEN A70QS300-4IL fuse?

The MERSEN A70QS300-4IL is a 300 A, fast-acting semiconductor fuse from the A70QS series. It is rated for 700 V AC and 700 V DC, with a bolt-on design and an indicating function. The voltage type is AC/DC, and the manufacturer part number is A70QS300-4IL.

Where to buy the MERSEN A70QS300-4IL fuse worldwide?

You can source the MERSEN A70QS300-4IL fuse through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine MERSEN components for power protection applications.

How to select the correct MERSEN A70QS series fuse for a circuit?

To select the correct MERSEN A70QS fuse, match the voltage rating (700 V AC/DC) and current rating (300 A for this model) to your circuit requirements. Ensure the fast-acting characteristic suits your semiconductor protection needs. The indicating feature helps identify blown fuses. Consult the manufacturer's data sheet for coordination and mounting details.

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 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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