We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

MERSEN Semiconductor Fuse: A70QS Series, Fast-Acting, 500 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, 500 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, part number A70QS500-4IL, is rated for 500 A and 700 V AC/700 V DC, featuring an indicating…

SKU 3G-OTH-26321

Also listed as: A70QS5004IL · A70QS500 4IL

Brand
MERSEN
Item
Semiconductor Fuse: A70QS Series, Fast-Acting, 500 A, 700 V AC, 700 V DC DC Volt Rating
Category
Fast-Acting Bolt-On Fuses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

MERSEN
Manufacturer Part Number
A70QS500-4IL
Series
A70QS
Type
Fast-Acting, 500 A, Indicating
AC
700 V
Voltage Type
AC/DC
DC DC Volt Rating
700 V

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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, part number A70QS500-4IL, is rated for 500 A and 700 V AC/700 V DC, featuring an indicating function. It provides overcurrent protection for power electronic circuits.

Frequently Asked Questions

What is the MERSEN A70QS500-4IL semiconductor fuse used for?

The MERSEN A70QS500-4IL is a fast-acting bolt-on fuse used for overcurrent protection in power electronic circuits, such as variable frequency drives, rectifiers, and UPS systems. Its 700 V AC/DC rating and 500 A capacity make it suitable for industrial equipment requiring reliable short-circuit protection.

What are the specifications of the MERSEN A70QS500-4IL fuse?

The MERSEN A70QS500-4IL is a 500 A, 700 V AC/700 V DC fast-acting semiconductor fuse from the A70QS series. It features a bolt-on design with an indicating function for visual blown-fuse detection. The voltage type is AC/DC, and the manufacturer part number is A70QS500-4IL.

Where to buy the MERSEN A70QS500-4IL fuse worldwide?

You can source the MERSEN A70QS500-4IL 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 an application?

To select the correct MERSEN A70QS fuse, match the voltage rating (700 V AC/DC) and current rating (e.g., 500 A for the A70QS500-4IL) to your circuit's requirements. Consider the fast-acting characteristic for semiconductor protection and the indicating feature for easy maintenance. Consult the manufacturer's data sheet for coordination 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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Semiconductor Fuse: A70QS Series, Fast-Acting, 400 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS400-4)
MERSEN
Semiconductor Fuse: A70QS Series, Fast-Acting, 400 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS400-4)
Semiconductor Fuse: A70QS Series, Fast-Acting, 350 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS350-4)
MERSEN
Semiconductor Fuse: A70QS Series, Fast-Acting, 350 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS350-4)
Semiconductor Fuse: A70QS Series, Fast-Acting, 35 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS35-4)
MERSEN
Semiconductor Fuse: A70QS Series, Fast-Acting, 35 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS35-4)
Semiconductor Fuse: A70QS Series, Fast-Acting, 50 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS50-4)
MERSEN
Semiconductor Fuse: A70QS Series, Fast-Acting, 50 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS50-4)
Semiconductor Fuse: A70QS Series, Fast-Acting, 40 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS40-4)
MERSEN
Semiconductor Fuse: A70QS Series, Fast-Acting, 40 A, 700 V AC, 700 V DC DC Volt Rating (MPN A70QS40-4)
Semiconductor Fuse: A70QS Series, Fast-Acting, 600 A, 700 V AC, 700 V DC DC Volt Rating, Indicating (MPN A70QS600-4IL)
MERSEN
Semiconductor Fuse: A70QS Series, Fast-Acting, 600 A, 700 V AC, 700 V DC DC Volt Rating, Indicating (MPN A70QS600-4IL)

More from MERSEN

View all MERSEN parts
Semiconductor Fuse: A30QS Series, Fast-Acting, 60 A, 300 V AC, 300 V DC DC Volt Rating (MPN A30QS60-4)
MERSEN
Semiconductor Fuse: A30QS Series, Fast-Acting, 60 A, 300 V AC, 300 V DC DC Volt Rating (MPN A30QS60-4)
Semiconductor Fuse: A30QS Series, Fast-Acting, 150 A, 300 V AC, 300 V DC DC Volt Rating (MPN A30QS150-4)
MERSEN
Semiconductor Fuse: A30QS Series, Fast-Acting, 150 A, 300 V AC, 300 V DC DC Volt Rating (MPN A30QS150-4)
Semiconductor Fuse: A60X Series, Fast-Acting, 60 A, 600 V AC, Non-Indicating (MPN A60X60-4)
MERSEN
Semiconductor Fuse: A60X Series, Fast-Acting, 60 A, 600 V AC, Non-Indicating (MPN A60X60-4)
Semiconductor Fuse: A70Q Series, Fast-Acting, 125 A, 700 V AC, 650 V DC DC Volt Rating (MPN A70Q125-4)
MERSEN
Semiconductor Fuse: A70Q Series, Fast-Acting, 125 A, 700 V AC, 650 V DC DC Volt Rating (MPN A70Q125-4)
Semiconductor Fuse: A15QS Series, Fast-Acting, 60 A, 150 V AC, 150 V DC DC Volt Rating (MPN A15QS60-4)
MERSEN
Semiconductor Fuse: A15QS Series, Fast-Acting, 60 A, 150 V AC, 150 V DC DC Volt Rating (MPN A15QS60-4)
MERSEN Fuse: A4J Series, Class J, Blade Body, Fast-Acting, 250 A, 600 V AC, 300 V DC, Non-Indicating (MPN A4J250)
MERSEN
MERSEN Fuse: A4J Series, Class J, Blade Body, Fast-Acting, 250 A, 600 V AC, 300 V DC, Non-Indicating (MPN A4J250)
Semiconductor Fuse: A60X Series, Fast-Acting, 200 A, 600 V AC, Non-Indicating (MPN A60X200-4)
MERSEN
Semiconductor Fuse: A60X Series, Fast-Acting, 200 A, 600 V AC, Non-Indicating (MPN A60X200-4)
Semiconductor Fuse: A30QS Series, Fast-Acting, 80 A, 300 V AC, 300 V DC DC Volt Rating (MPN A30QS80-4)
MERSEN
Semiconductor Fuse: A30QS Series, Fast-Acting, 80 A, 300 V AC, 300 V DC DC Volt Rating (MPN A30QS80-4)