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

MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.2 kA, 600 V AC - Time-Delay Bolt-On Fuses
MERSENTime-Delay Bolt-On Fuses

MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.2 kA, 600 V AC

The MERSEN A4BQ1200 is a Class L time-delay bolt-on fuse from the A4BQ Series, rated at 1.2 kA, 600 V AC, and 500 V DC. This bolt-on body fuse is designed for overcurrent protection in industrial electrical systems.

SKU 3G-OTH-27035

Brand
MERSEN
Item
Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.2 kA, 600 V AC
Category
Time-Delay 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 — 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
A4BQ1200
Series
A4BQ
Type
A4BQ Series, Bolt-On Body, Time-Delay, 1.2 kA
AC
600 V
DC
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 A4BQ1200 is a Class L time-delay bolt-on fuse from the A4BQ Series, rated at 1.2 kA, 600 V AC, and 500 V DC. This bolt-on body fuse is designed for overcurrent protection in industrial electrical systems.

Frequently Asked Questions

What is the MERSEN A4BQ1200 fuse used for?

The MERSEN A4BQ1200 is a Class L time-delay bolt-on fuse used for overcurrent protection in industrial electrical systems. It safeguards equipment such as motors, transformers, and feeders in manufacturing plants, power distribution, and heavy machinery applications where high fault currents up to 1.2 kA are present.

What are the specifications of the MERSEN A4BQ1200 fuse?

The MERSEN A4BQ1200 is rated at 1.2 kA, 600 V AC, and 500 V DC. It features a bolt-on body design, time-delay characteristic, and belongs to the A4BQ Series. This Class L fuse is suitable for high-current industrial circuits requiring reliable overcurrent protection.

Where to buy the MERSEN A4BQ1200 fuse worldwide?

You can source the MERSEN A4BQ1200 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 A4BQ Series fuses for industrial applications.

How to select the correct MERSEN A4BQ1200 fuse for an application?

To select the MERSEN A4BQ1200, verify your system voltage (600 V AC or 500 V DC max) and continuous current (1.2 kA). Ensure the bolt-on mounting matches your fuse holder. The time-delay characteristic is ideal for motor or transformer inrush currents. Always consult the MERSEN A4BQ Series datasheet for coordination and safety guidelines.

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 time-delay 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
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.4 kA, 600 V AC, 500 V DC (MPN A4BQ1400)
MERSEN
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.4 kA, 600 V AC, 500 V DC (MPN A4BQ1400)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1 kA, 600 V AC, 500 V DC (MPN A4BQ1000)
MERSEN
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1 kA, 600 V AC, 500 V DC (MPN A4BQ1000)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.35 kA, 600 V AC, 500 V DC (MPN A4BQ1350)
MERSEN
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.35 kA, 600 V AC, 500 V DC (MPN A4BQ1350)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.8 kA, 600 V AC, 500 V DC (MPN A4BQ1800)
MERSEN
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 1.8 kA, 600 V AC, 500 V DC (MPN A4BQ1800)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC, 500 V DC (MPN A4BQ900)
MERSEN
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 900 A, 600 V AC, 500 V DC (MPN A4BQ900)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 800 A, 600 V AC, 500 V DC (MPN A4BQ800)
MERSEN
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 800 A, 600 V AC, 500 V DC (MPN A4BQ800)

More from MERSEN

View all MERSEN parts
MERSEN Forklift Limiter Fuse: ACK Series, Bolt-On, Gen Purpose, 30 A, 125 V DC, Non-Indicating (MPN ACK30)
MERSEN
MERSEN Forklift Limiter Fuse: ACK Series, Bolt-On, Gen Purpose, 30 A, 125 V DC, Non-Indicating (MPN ACK30)
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 750 A, 600 V AC, 500 V DC (MPN A4BQ750)
MERSEN
MERSEN Fuse: Class L, A4BQ Series, Bolt-On Body, Time-Delay, 750 A, 600 V AC, 500 V DC (MPN A4BQ750)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 750 A, 600 V AC, 300 V DC (MPN A4BY750)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 750 A, 600 V AC, 300 V DC (MPN A4BY750)
MERSEN Forklift Limiter Fuse: CNL Series, Bolt-On, Gen Purpose, 200 A, 80 V DC, Indicating, AC/DC (MPN CNL200)
MERSEN
MERSEN Forklift Limiter Fuse: CNL Series, Bolt-On, Gen Purpose, 200 A, 80 V DC, Indicating, AC/DC (MPN CNL200)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 650 A, 600 V AC, 300 V DC (MPN A4BY650)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 650 A, 600 V AC, 300 V DC (MPN A4BY650)
MERSEN Forklift Limiter Fuse: CNL Series, Bolt-On, Gen Purpose, 400 A, 80 V DC, Indicating, AC/DC (MPN CNL400)
MERSEN
MERSEN Forklift Limiter Fuse: CNL Series, Bolt-On, Gen Purpose, 400 A, 80 V DC, Indicating, AC/DC (MPN CNL400)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.6 kA, 600 V AC, 300 V DC (MPN A4BY1600)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.6 kA, 600 V AC, 300 V DC (MPN A4BY1600)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 3 kA, 600 V AC, 300 V DC (MPN A4BY3000)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 3 kA, 600 V AC, 300 V DC (MPN A4BY3000)