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MERSEN A30QS125-4 Fast-Acting Bolt-On Fuse, 125 A, 300 V AC/DC - Fast-Acting Bolt-On Fuses
MERSENFast-Acting Bolt-On Fuses

MERSEN A30QS125-4 Fast-Acting Bolt-On Fuse, 125 A, 300 V AC/DC

The MERSEN A30QS Series Semiconductor Fuse (MPN A30QS125-4) is a fast-acting bolt-on fuse rated at 125 A and 300 V AC/300 V DC. This industrial fuse is designed for overcurrent protection in power electronic circuits.

SKU 3G-OTH-27861

Also listed as: A30QS1254 · A30QS125 4

Brand
MERSEN
Item
A30QS125-4 Fast-Acting Bolt-On Fuse, 125 A, 300 V AC/DC
Category
Fast-Acting Bolt-On Fuses
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Technical Specifications

MERSEN
Manufacturer Part Number
A30QS125-4
Series
A30QS
Type
Fast-Acting, 125 A
AC
300 V
Voltage Type
AC/DC
DC DC Volt Rating
300 V

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

Product Description

The MERSEN A30QS Series Semiconductor Fuse (MPN A30QS125-4) is a fast-acting bolt-on fuse rated at 125 A and 300 V AC/300 V DC. This industrial fuse is designed for overcurrent protection in power electronic circuits.

Frequently Asked Questions

What is the MERSEN A30QS125-4 semiconductor fuse used for?

The MERSEN A30QS125-4 is a fast-acting bolt-on fuse used for overcurrent protection in power electronic circuits, such as variable frequency drives, rectifiers, and UPS systems. It safeguards sensitive semiconductor devices by quickly clearing faults at 125 A and up to 300 V AC/DC.

What are the specifications of the MERSEN A30QS125-4 fuse?

The MERSEN A30QS125-4 is a 125 A, fast-acting semiconductor fuse from the A30QS series. It has an AC/DC voltage rating of 300 V AC and 300 V DC. The bolt-on design ensures secure mounting in industrial equipment. The manufacturer part number is A30QS125-4.

Where to buy the MERSEN A30QS125-4 fuse worldwide?

3G Electric supplies the MERSEN A30QS125-4 semiconductor fuse worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this fast-acting fuse to any country.

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

To select the correct MERSEN A30QS fuse, match the continuous current rating (e.g., 125 A) to your circuit load and ensure the voltage rating (300 V AC/DC) exceeds system voltage. Consider the fast-acting characteristic for semiconductor protection. Consult the fuse's I²t curve and mounting style (bolt-on) for proper coordination.

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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