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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.201 kA, 600 V AC - Time-Delay Bolt-On Fuses
MERSENTime-Delay Bolt-On Fuses

MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.201 kA, 600 V AC

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
Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.201 kA, 600 V AC
Category
Time-Delay Bolt-On Fuses
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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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MERSEN Products
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
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.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.2 kA, 600 V AC, 300 V DC (MPN A4BY1200)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.2 kA, 600 V AC, 300 V DC (MPN A4BY1200)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.4 kA, 600 V AC, 300 V DC (MPN A4BY1400)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.4 kA, 600 V AC, 300 V DC (MPN A4BY1400)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.35 kA, 600 V AC, 300 V DC (MPN A4BY1350)
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MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.35 kA, 600 V AC, 300 V DC (MPN A4BY1350)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.5 kA, 600 V AC, 300 V DC (MPN A4BY1500)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 1.5 kA, 600 V AC, 300 V DC (MPN A4BY1500)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 2 kA, 600 V AC, 300 V DC (MPN A4BY2000)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 2 kA, 600 V AC, 300 V DC (MPN A4BY2000)
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 2.001 kA, 600 V AC, 300 V DC (MPN A4BY2001)
MERSEN
MERSEN Fuse: Class L, A4BY Series, Bolt-On Body, Time-Delay, 2.001 kA, 600 V AC, 300 V DC (MPN A4BY2001)

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