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3G Electric
MERSEN A30QS70-4 Fast-Acting Bolt-On Fuse, 70 A, 300 V AC/DC - Fast-Acting Bolt-On Fuses
MERSENFast-Acting Bolt-On Fuses

MERSEN A30QS70-4 Fast-Acting Bolt-On Fuse, 70 A, 300 V AC/DC

The MERSEN A30QS Series is a fast-acting bolt-on fuse designed for semiconductor protection. This specific model, part number A30QS70-4, is rated for 70 A and 300 V AC/DC. It is a 300 V DC volt-rated device from the…

SKU 3G-OTH-27708

Also listed as: A30QS704 · A30QS70 4

Brand
MERSEN
Item
A30QS70-4 Fast-Acting Bolt-On Fuse, 70 A, 300 V AC/DC
Part Number
A30QS70-4
Category
Fast-Acting Bolt-On Fuses
Available to Order
Also known as:A30QS70-4MERSEN
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Technical Specifications

MERSEN
Manufacturer Part Number
A30QS70-4
Series
A30QS
Type
Fast-Acting, 70 A
AC
300 V
Voltage Type
AC/DC
DC DC Volt Rating
300 V

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3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MERSEN A30QS Series is a fast-acting bolt-on fuse designed for semiconductor protection. This specific model, part number A30QS70-4, is rated for 70 A and 300 V AC/DC. It is a 300 V DC volt-rated device from the A30QS series.

Frequently Asked Questions

What is the MERSEN A30QS70-4 fuse used for?

The MERSEN A30QS70-4 is a fast-acting bolt-on fuse designed for semiconductor protection. It safeguards sensitive electronic components like diodes, thyristors, and IGBTs from overcurrents in power conversion equipment, drives, and UPS systems. Its 300 V AC/DC rating makes it suitable for both AC and DC circuits.

What are the specifications of the MERSEN A30QS70-4?

The MERSEN A30QS70-4 is a 70 A, 300 V AC/DC fast-acting bolt-on fuse from the A30QS series. It is a semiconductor protection fuse with a DC voltage rating of 300 V DC. The manufacturer part number is A30QS70-4, and it is designed for bolt-on mounting in industrial equipment.

Where to buy the MERSEN A30QS70-4 worldwide?

3G Electric supplies the MERSEN A30QS70-4 semiconductor fuse worldwide. As a global industrial equipment distributor established in 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this fast-acting bolt-on fuse globally.

How to select the correct MERSEN A30QS fuse for my application?

Select the MERSEN A30QS fuse based on your circuit's continuous current (70 A for this model) and voltage rating (300 V AC/DC). Ensure the fuse's interrupting rating exceeds the available fault current. For semiconductor protection, choose a fast-acting design like the A30QS series to limit let-through energy. Consult MERSEN application notes for coordination.

Used in

Common applications for MERSEN
Industrial control panels — Mersen USCC1 and USCC2 UL Class CC fuse blocks for DIN rail mounting and finger-safe branch circuit protection.
Motor starters — Mersen ATQ time-delay fuses and DAR0 R-rated fuses for motor overload and short-circuit protection.
Power supplies and instrumentation — Mersen GGM and GSB fast-acting cylindrical fuses for overcurrent protection in compact electronic circuits.
DC systems — Mersen A30QS very-fast-acting square fuses rated 300 V DC for semiconductor and DC equipment protection.
Medium-voltage distribution — Mersen DAR0 R-rated fuses rated 5.08 kV AC for general-purpose overcurrent protection with visual indication.
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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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