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

3G Electric
MERSEN A70QS125-4IL Fast-Acting Bolt-On Fuse, 125 A, 700 V AC/DC, Indicating - Fast-Acting Bolt-On Fuses
MERSENFast-Acting Bolt-On Fuses

MERSEN A70QS125-4IL Fast-Acting Bolt-On Fuse, 125 A, 700 V AC/DC, Indicating

The MERSEN A70QS Series is a fast-acting bolt-on semiconductor fuse, model A70QS125-4IL, rated at 125 A and 700 V AC/700 V DC. This indicating fuse is designed for AC/DC voltage applications.

SKU 3G-OTH-28161

Also listed as: A70QS1254IL · A70QS125 4IL

Brand
MERSEN
Item
A70QS125-4IL Fast-Acting Bolt-On Fuse, 125 A, 700 V AC/DC, Indicating
Part Number
A70QS125-4IL
Category
Fast-Acting Bolt-On Fuses
Available to Order
Also known as:A70QS125-4ILMERSEN
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
A70QS125-4IL
Series
A70QS
Type
Fast-Acting, 125 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 is a fast-acting bolt-on semiconductor fuse, model A70QS125-4IL, rated at 125 A and 700 V AC/700 V DC. This indicating fuse is designed for AC/DC voltage applications.

Frequently Asked Questions

What is the MERSEN A70QS125-4IL semiconductor fuse used for?

The MERSEN A70QS125-4IL is a fast-acting bolt-on fuse used to protect power semiconductors, such as diodes and thyristors, in AC/DC circuits. It is commonly applied in industrial drives, power supplies, and conversion equipment where rapid overcurrent interruption is critical to prevent component damage.

What are the specifications of the MERSEN A70QS125-4IL fuse?

The MERSEN A70QS125-4IL is a 125 A, 700 V AC/700 V DC fast-acting indicating fuse from the A70QS series. It features a bolt-on design for secure mounting and a visual indicator to show when the fuse has opened. The voltage type is AC/DC, making it suitable for mixed-voltage applications.

Where to buy the MERSEN A70QS125-4IL fuse worldwide?

You can source the MERSEN A70QS125-4IL 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 provide competitive pricing and reliable supply chain support.

How to select the correct MERSEN A70QS series fuse for my application?

To select the correct MERSEN A70QS fuse, match the continuous current rating (e.g., 125 A) to your circuit's load, and ensure the voltage rating (700 V AC/700 V DC) exceeds your system voltage. Consider the fast-acting characteristic for semiconductor protection and the indicating feature for easy blown-fuse identification. Consult MERSEN application notes for 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.
Not sure this is the right part? Photo-identify it

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

More from MERSEN

View all MERSEN parts
Fast-acting bolt-on fuse rated 300 A at 700 V AC and 700 V DC. Part of the A70QS series, designed for overcurrent protection in power electronic circuits such as variable frequency drives, UPS systems, and DC power supplies
MERSEN
Fast-acting bolt-on fuse rated 300 A at 700 V AC and 700 V DC. Part of the A70QS series, designed for overcurrent protection in power electronic circuits such as variable frequency drives, UPS systems, and DC power supplies
Class J fast-acting bolt-on fuse with blade body, rated 400 A, 600 V AC, 300 V DC. Non-indicating design. Suitable for overcurrent protection in power distribution, motor control centers, and panelboards requiring high interrupting capacity in a compact form
MERSEN
Class J fast-acting bolt-on fuse with blade body, rated 400 A, 600 V AC, 300 V DC. Non-indicating design. Suitable for overcurrent protection in power distribution, motor control centers, and panelboards requiring high interrupting capacity in a compact form
Class J blade-body fast-acting bolt-on fuse rated 200 A at 600 V AC and 300 V DC. Non-indicating design provides overcurrent protection for industrial distribution panels and motor control centers
MERSEN
Class J blade-body fast-acting bolt-on fuse rated 200 A at 600 V AC and 300 V DC. Non-indicating design provides overcurrent protection for industrial distribution panels and motor control centers

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first