Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
MERSEN A50QS500-4 Fast-Acting Bolt-On Fuse, 500 A, 500 V AC/DC - Fast-Acting Bolt-On Fuses
MERSENFast-Acting Bolt-On Fuses

MERSEN A50QS500-4 Fast-Acting Bolt-On Fuse, 500 A, 500 V AC/DC

The MERSEN A50P Series Semiconductor Fuse (MPN A50QS500-4) is a fast-acting bolt-on fuse rated for 500 A at 500 V AC and 500 V DC. This AC/DC voltage-type fuse is designed for overcurrent protection in power…

SKU 3G-OTH-26620

Also listed as: A50QS5004 · A50QS500 4

Brand
MERSEN
Item
A50QS500-4 Fast-Acting Bolt-On Fuse, 500 A, 500 V AC/DC
Part Number
A50QS500-4
Category
Fast-Acting Bolt-On Fuses
Available to Order
Also known as:A50QS500-4MERSEN
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 — 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
A50QS500-4
Series
A50P
Type
Fast-Acting, 500 A
AC
500 V
Voltage Type
AC/DC
DC DC Volt Rating
500 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 A50P Series Semiconductor Fuse (MPN A50QS500-4) is a fast-acting bolt-on fuse rated for 500 A at 500 V AC and 500 V DC. This AC/DC voltage-type fuse is designed for overcurrent protection in power electronic circuits.

Frequently Asked Questions

What is the MERSEN A50P Series semiconductor fuse used for?

The MERSEN A50P Series fast-acting bolt-on fuse (MPN A50QS500-4) protects power electronic circuits from overcurrent. It is commonly applied in variable frequency drives, UPS systems, and DC power supplies where rapid fault clearing is required to safeguard sensitive semiconductor components.

What are the specifications of the MERSEN A50QS500-4 fuse?

The MERSEN A50QS500-4 is a fast-acting bolt-on fuse rated for 500 A at 500 V AC and 500 V DC. It belongs to the A50P Series with AC/DC voltage type. Key specs include a 500 V DC volt rating and manufacturer part number A50QS500-4.

Where to buy MERSEN A50QS500-4 fuses worldwide?

3G Electric supplies the MERSEN A50QS500-4 semiconductor fuse worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this fast-acting bolt-on fuse.

How to select the correct MERSEN A50P fuse for my application?

Select the MERSEN A50P fuse based on your circuit's continuous current (500 A max) and voltage rating (500 V AC or DC). Ensure the fast-acting characteristic matches your semiconductor's I²t withstand capability. Consult the manufacturer's data sheet for coordination with your equipment.

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.
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