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

3G Electric
RFQ CartGet a QuoteSign inSign up
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 350 A, 600 V AC - Time-Delay Bolt-On Fuses
MERSENTime-Delay Bolt-On Fuses

MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 350 A, 600 V AC

The MERSEN A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY350) is a 350 A, 600 V AC, 300 V DC industrial fuse with a bolt-on body. It provides time-delay overcurrent protection for electrical circuits.

SKU 3G-OTH-25680

Brand
MERSEN
Item
Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 350 A, 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

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
A4BY350
Series
A4BY
Type
A4BY Series, Bolt-On Body, Time-Delay, 350 A
AC
600 V
DC
300 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 A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY350) is a 350 A, 600 V AC, 300 V DC industrial fuse with a bolt-on body. It provides time-delay overcurrent protection for electrical circuits.

Frequently Asked Questions

What is the MERSEN A4BY350 fuse used for?

The MERSEN A4BY350 is a Class L time-delay bolt-on fuse rated 350 A, 600 V AC, 300 V DC. It protects industrial electrical circuits from overcurrents and short circuits, commonly used in switchboards, panelboards, and motor control centers where high interrupting capacity is required.

What are the specifications of the MERSEN A4BY350 fuse?

The MERSEN A4BY350 is a 350 A, 600 V AC, 300 V DC Class L time-delay bolt-on fuse from the A4BY series. It features a bolt-on body for secure mounting and provides time-delay overcurrent protection. The manufacturer part number is A4BY350.

Where to buy MERSEN A4BY350 fuses worldwide?

3G Electric supplies MERSEN A4BY350 fuses worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this fuse to any country.

How to select the correct MERSEN A4BY fuse for an application?

Select the MERSEN A4BY fuse based on system voltage (600 V AC or 300 V DC), continuous current rating (350 A for the A4BY350), and required time-delay characteristics. Ensure the bolt-on body matches your fuse holder. Consult the MERSEN A4BY series datasheet for coordination and interrupting rating 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 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, A4BY Series, Bolt-On Body, Time-Delay, 300 A, 600 V AC, 300 V DC (MPN A4BY300)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 300 A, 600 V AC, 300 V DC (MPN A4BY300)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 250 A, 600 V AC, 300 V DC (MPN A4BY250)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 250 A, 600 V AC, 300 V DC (MPN A4BY250)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 200 A, 600 V AC, 300 V DC (MPN A4BY200)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 200 A, 600 V AC, 300 V DC (MPN A4BY200)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 600 A, 600 V AC, 300 V DC (MPN A4BY600)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 600 A, 600 V AC, 300 V DC (MPN A4BY600)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 450 A, 600 V AC, 300 V DC (MPN A4BY450)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 450 A, 600 V AC, 300 V DC (MPN A4BY450)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 500 A, 600 V AC, 300 V DC (MPN A4BY500)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 500 A, 600 V AC, 300 V DC (MPN A4BY500)

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)