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MERSEN FUSE A 070 URD 31 TTI 0550 A070URD31TTI0550

MERSEN FUSE A 070 URD 31 TTI 0550 A070URD31TTI0550

Protistor® Size 31 high-speed fuse ensures reliable equipment safety with rapid fault interruption up to 550A. Certified to IEC 690VAC and UL 700VAC standards with integrated striker indication and flush ends UNC threads.

SKU: H300479Alt SKU: A070UD31TTI550MPN: H300479
Price
List Price £164.06 ex VAT
Your Price (ex VAT)
£164.06
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Sold in packs of 3

£164.06

Why Choose the Mersen H300479 Electrical Protection Component?

The Mersen H300479 is a professional-grade electrical protection component intended for use with compatible industrial power distribution, power conversion and machinery control equipment. Manufactured by Mersen, it is suitable for applications where dependable protection, precise component identification and reliable system operation are essential.

The H300479 manufacturer reference enables engineers, panel builders, maintenance professionals and purchasing teams to identify the required component accurately. Selecting the correct Mersen product helps preserve the electrical and mechanical characteristics specified for the original installation while reducing the risk of compatibility problems caused by unsuitable replacement components.

Before purchasing or installing the Mersen H300479, its rated voltage, rated current, protection category, breaking capacity, terminal arrangement and physical dimensions should be confirmed against the existing component and the latest official Mersen technical documentation. Installation should only proceed when every relevant electrical and mechanical specification matches the intended application.

Key Advantages

  • Genuine Mersen electrical protection component.
  • Clearly identified by manufacturer reference H300479.
  • Suitable for professional industrial electrical applications.
  • Supports accurate maintenance and replacement-part selection.
  • Designed for integration with compatible power and control equipment.
  • Suitable for OEM, maintenance, repair and overhaul requirements.

Key Features

  • Mersen manufacturer reference H300479.
  • Professional-grade electrical protection construction.
  • Suitable for compatible industrial power systems.
  • Supports dependable equipment operation when correctly specified.
  • Suitable for replacement and original equipment applications.
  • Application-specific electrical and mechanical characteristics.
  • Designed for installation by qualified electrical professionals.
  • Backed by Mersen electrical protection expertise.

Reliable Protection for Industrial Electrical Systems

Correctly selected electrical protection components help limit the effects of short circuits, overcurrents and other abnormal electrical conditions. They can help protect valuable machinery, conductors, control systems and power electronic equipment while reducing the likelihood of unplanned downtime.

The Mersen H300479 should be matched using its complete manufacturer reference and installed by a suitably qualified electrical professional. The operating voltage, current, protection characteristics, breaking capacity, mounting arrangement and environmental conditions must be verified before the equipment is energised.

Typical Applications

  • Industrial electrical control panels.
  • Power distribution equipment.
  • Power conversion and motor control systems.
  • Industrial machinery and production equipment.
  • OEM electrical assemblies.
  • Maintenance, repair and overhaul projects.

Technical Specifications

Item number H300479
Catalogue No A070UD31TTI550
Description Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 550A With Striker Flush ends UNC threads
EAN/UPC Code 3605340329087
Rated voltage AC UL 700 V
Rated voltage AC IEC 690 V
Ampere Rating 550 A
RoHS Compliant Yes
AC or DC AC
Speed/Characteristic aR
Fuse Size 31
Mounting Bolted
Clearing I2t At Rated Voltage 310000 A²s
Melting I2t 52000 A²s
AC Max I.R./Breaking Capacity I1: 200 kA
Indication System Yes
Indication System Type Striker
Connection/Terminal Material Silver-Plated Brass
Connection/Terminal Type Flush ends
Product Width 51 mm
Product Length 50.6 mm
Product Height 56.5 mm
Sell Pack Quantity 3 EA
Sell Pack Weight 1.155 kg
Sell Pack Width 85 mm
Sell Pack Length 168 mm
Sell Pack Height 65 mm
Product group Semiconductor Protection Fuses
Body/Insulating Material Ceramic
Product Weight 0.385 kg
Power Dissipation at Rated Current Value 70 W
HS Code 85361090
Country of Manufacture France
Fuse Type Semiconductor
Fuse Class aR
Voltage 690 V

Frequently Asked Questions

What is the Mersen H300479 used for?

The Mersen H300479 is an electrical protection component intended for use with compatible industrial power, machinery and electrical control equipment.

How can I confirm that the H300479 is compatible?

Compare the complete H300479 part number, electrical ratings, protection characteristics, terminal configuration and dimensions with the existing component and official Mersen documentation.

Can the Mersen H300479 be used as a replacement part?

It may be used as a replacement where the original equipment documentation specifies the same Mersen reference and matching electrical and mechanical characteristics.

What specifications should be checked before installation?

Confirm the rated voltage, rated current, protection category, breaking capacity, terminal arrangement, dimensions and operating environment before installation.

Who should install the Mersen H300479?

The component should be selected and installed by a suitably qualified electrical professional in accordance with the equipment instructions and applicable electrical regulations.

Trusted Electrical Protection Expertise

Mersen electrical protection products are used by engineers, panel builders, equipment manufacturers and maintenance professionals to support dependable operation in industrial power and control systems.

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At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.

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We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products. 

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