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MERSEN A4BY1201 Time-Delay Bolt-On Fuse, 1.201 kA, 600 V AC, 300 V DC - Time-Delay Bolt-On Fuses
MERSENTime-Delay Bolt-On Fuses

MERSEN A4BY1201 Time-Delay Bolt-On Fuse, 1.201 kA, 600 V AC, 300 V DC

The MERSEN A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY1201) is a bolt-on body fuse rated at 1.201 kA, 600 V AC, and 300 V DC. This time-delay fuse from MERSEN is designed for overcurrent protection in…

SKU 3G-OTH-27176

Brand
MERSEN
Item
A4BY1201 Time-Delay Bolt-On Fuse, 1.201 kA, 600 V AC, 300 V DC
Part Number
A4BY1201
Category
Time-Delay Bolt-On Fuses
Available to Order
Also known as:A4BY1201MERSEN
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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
A4BY1201
Series
A4BY
Type
A4BY Series, Bolt-On Body, Time-Delay, 1.201 kA
AC
600 V
DC
300 V

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3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MERSEN A4BY Series Class L Time-Delay Bolt-On Fuse (MPN A4BY1201) is a bolt-on body fuse rated at 1.201 kA, 600 V AC, and 300 V DC. This time-delay fuse from MERSEN is designed for overcurrent protection in industrial electrical systems.

Frequently Asked Questions

What is the MERSEN A4BY1201 fuse used for?

The MERSEN A4BY1201 is a Class L time-delay bolt-on fuse used for overcurrent protection in industrial electrical systems. It handles high fault currents up to 1.201 kA at 600 V AC or 300 V DC, making it suitable for motor circuits, transformers, and main feeder protection in manufacturing and process plants.

What are the specifications of the MERSEN A4BY1201 fuse?

The MERSEN A4BY1201 is a Class L, A4BY Series, bolt-on body, time-delay fuse rated at 1.201 kA, 600 V AC, and 300 V DC. It is manufactured by MERSEN under part number A4BY1201. The bolt-on design ensures secure mounting in fuse holders or disconnects for industrial power distribution.

Where to buy the MERSEN A4BY1201 fuse worldwide?

3G Electric supplies the MERSEN A4BY1201 fuse worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact 3G Electric for pricing and lead time on this A4BY Series time-delay fuse.

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

Select the MERSEN A4BY Series fuse based on system voltage (600 V AC or 300 V DC), continuous current rating (1.201 kA for the A4BY1201), and time-delay characteristics for motor or transformer inrush. Always verify the bolt-on body dimensions match your fuse holder. Consult a qualified engineer for coordination studies.

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.
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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.

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