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MERSEN A30QS400-4IL Very-Fast-Acting Bolt-On Square Fuse - Very-Fast-Acting Bolt-On Square Fuses
MERSENVery-Fast-Acting Bolt-On Square Fuses

MERSEN A30QS400-4IL Very-Fast-Acting Bolt-On Square Fuse

The MERSEN A30QS Series A30QS400-4IL is a very-fast-acting bolt-on square fuse rated at 400 A, 300 V AC, and 300 V DC. This indicating fuse is designed for AC/DC voltage applications.

SKU 3G-OTH-24332

Also listed as: A30QS4004IL · A30QS400 4IL

Brand
MERSEN
Item
A30QS400-4IL Very-Fast-Acting Bolt-On Square Fuse
Category
Very-Fast-Acting Bolt-On Square 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
A30QS400-4IL
Series
A30QS
Voltage Type
AC/DC

Technical Documents

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

Product Description

The MERSEN A30QS Series A30QS400-4IL is a very-fast-acting bolt-on square fuse rated at 400 A, 300 V AC, and 300 V DC. This indicating fuse is designed for AC/DC voltage applications.

Frequently Asked Questions

What is the MERSEN A30QS400-4IL fuse used for?

The MERSEN A30QS400-4IL is a very-fast-acting bolt-on square fuse rated 400 A, 300 V AC/DC. It protects sensitive power electronics, drives, and DC bus circuits from overcurrents. Its indicating feature allows quick visual identification of a blown fuse, reducing downtime in industrial control panels and power distribution systems.

What are the specifications of the MERSEN A30QS400-4IL?

The MERSEN A30QS400-4IL is part of the A30QS series, rated 400 A, 300 V AC and 300 V DC. It is a very-fast-acting, bolt-on square fuse with an indicating function. The voltage type is AC/DC, and the manufacturer part number is A30QS400-4IL. It is designed for overcurrent protection in high-speed switching applications.

Where to buy the MERSEN A30QS400-4IL worldwide?

3G Electric supplies the MERSEN A30QS400-4IL fuse to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this very-fast-acting bolt-on square fuse for AC/DC applications.

How to select the correct MERSEN A30QS400-4IL fuse for an application?

To select the MERSEN A30QS400-4IL, verify your circuit’s continuous current does not exceed 400 A and the system voltage is within 300 V AC or DC. Ensure the bolt-on mounting style matches your fuse holder. This very-fast-acting fuse is ideal for protecting semiconductor devices; consult the manufacturer’s data sheet for coordination with upstream protection.

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 very-fast-acting bolt-on square 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
Fast-acting bolt-on fuse rated 20 A at 300 V AC and 300 V DC. Designed for semiconductor protection in industrial power equipment such as variable frequency drives, rectifiers, and power supplies
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Fast-acting bolt-on fuse rated 20 A at 300 V AC and 300 V DC. Designed for semiconductor protection in industrial power equipment such as variable frequency drives, rectifiers, and power supplies
Fast-acting bolt-on fuse rated 5 A at 300 V AC/DC. Designed for overcurrent protection in power electronic circuits such as variable frequency drives, rectifiers, and UPS systems. Part of the A30QS series
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Fast-acting bolt-on fuse rated 5 A at 300 V AC/DC. Designed for overcurrent protection in power electronic circuits such as variable frequency drives, rectifiers, and UPS systems. Part of the A30QS series
Fast-acting bolt-on fuse rated 450 A at 700 V AC and 700 V DC. Non-indicating design for overcurrent protection in AC/DC power systems. Suitable for industrial equipment, motor drives, and power supplies requiring high current ratings
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Fast-acting bolt-on fuse rated 450 A at 700 V AC and 700 V DC. Non-indicating design for overcurrent protection in AC/DC power systems. Suitable for industrial equipment, motor drives, and power supplies requiring high current ratings
Fast-acting bolt-on fuse rated 25 A at 300 V AC and 300 V DC. Designed for overcurrent protection in power electronic equipment such as drives, inverters, and rectifiers
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Fast-acting bolt-on fuse rated 25 A at 300 V AC and 300 V DC. Designed for overcurrent protection in power electronic equipment such as drives, inverters, and rectifiers

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Very-fast-acting bolt-on square fuse from the A30QS Series. Rated 200 A, 300 V AC and 300 V DC. Features an indicator for visual blown-fuse detection. Suitable for overcurrent protection in AC/DC circuits and power electronics
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Very-fast-acting bolt-on square fuse from the A30QS Series. Rated 200 A, 300 V AC and 300 V DC. Features an indicator for visual blown-fuse detection. Suitable for overcurrent protection in AC/DC circuits and power electronics
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The MERSEN A30QS300-4IL is a very-fast-acting bolt-on square fuse from the A30QS Series, rated at 300 A with 300 V AC and 300 V DC voltage ratings. It features an indicating function for visual blown-fuse identification. This fuse is used for overcurrent protection in AC/DC power systems, such as industrial equipment, DC drives, and power conversion units
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The MERSEN A30QS300-4IL is a very-fast-acting bolt-on square fuse from the A30QS Series, rated at 300 A with 300 V AC and 300 V DC voltage ratings. It features an indicating function for visual blown-fuse identification. This fuse is used for overcurrent protection in AC/DC power systems, such as industrial equipment, DC drives, and power conversion units
Very-fast-acting bolt-on square fuse from the A30QS Series, rated 150 A at 300 V AC and 300 V DC. Features an indicating function for visual blown-fuse detection. Suitable for overcurrent protection in power supplies, drives, and control panels
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Very-fast-acting bolt-on square fuse from the A30QS Series, rated 150 A at 300 V AC and 300 V DC. Features an indicating function for visual blown-fuse detection. Suitable for overcurrent protection in power supplies, drives, and control panels
Very-fast-acting bolt-on square fuse rated 500 A at 300 V AC/DC. Features an indicating function for quick identification of a blown fuse. Used for overcurrent protection in industrial power distribution and control panels
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Very-fast-acting bolt-on square fuse rated 500 A at 300 V AC/DC. Features an indicating function for quick identification of a blown fuse. Used for overcurrent protection in industrial power distribution and control panels
Very-fast-acting bolt-on square fuse from the A30QS series, rated 600 A at 300 V AC and 300 V DC. Features an indicating function for visual blown-fuse detection. Suitable for overcurrent protection in industrial power supplies and DC drives
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Very-fast-acting bolt-on square fuse from the A30QS series, rated 600 A at 300 V AC and 300 V DC. Features an indicating function for visual blown-fuse detection. Suitable for overcurrent protection in industrial power supplies and DC drives
Very-fast-acting bolt-on square fuse rated 700 A at 300 V AC and 300 V DC. Features an indicator for blown fuse detection. Used for overcurrent protection in power electronics, drives, and DC bus circuits requiring rapid fault clearing
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Very-fast-acting bolt-on square fuse rated 700 A at 300 V AC and 300 V DC. Features an indicator for blown fuse detection. Used for overcurrent protection in power electronics, drives, and DC bus circuits requiring rapid fault clearing
Very-fast-acting bolt-on square fuse rated 800 A at 300 V AC and 300 V DC. Features indicating function for visual blown-fuse indication. Suitable for overcurrent protection in industrial equipment requiring rapid response to faults
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Very-fast-acting bolt-on square fuse rated 800 A at 300 V AC and 300 V DC. Features indicating function for visual blown-fuse indication. Suitable for overcurrent protection in industrial equipment requiring rapid response to faults