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MERSEN FUSE 6,9 URD 31 EF 0550 6,9URD31EF0550
High-speed fuse designed for semiconductor protection with a robust ceramic square body, striker indication, and open slot blades for bolted mounting. Rated 550A, 690VAC IEC, 700VAC UL.
£105.13
Why Choose the Mersen J300043 Industrial Circuit Protection Component?
The Mersen J300043 is a professional industrial circuit protection component intended for use in compatible electrical power distribution, control and equipment protection systems. Manufactured by Mersen, it is suitable for maintenance, replacement and OEM applications where dependable electrical protection and accurate component selection are essential.
Mersen manufactures specialist fuses, fuse holders and associated protection products for industrial machinery, power conversion systems, switchgear and electrical infrastructure. The unique J300043 manufacturer part number enables engineers, panel builders and procurement teams to identify the required component when maintaining or repairing compatible equipment.
Before ordering or installing the J300043, users should verify its precise product function, electrical ratings, dimensions, terminal arrangement and compatibility against the existing component or official Mersen documentation. Correct specification matching is essential for maintaining the intended protection performance and safe operation of the electrical installation.
Key Advantages
- Genuine Mersen industrial electrical protection component.
- Clearly identified by manufacturer part number J300043.
- Suitable for maintenance, repair, replacement and OEM requirements.
- Designed for use in compatible industrial electrical assemblies.
- Supports dependable operation of power distribution and control equipment.
- Manufactured by an established specialist in circuit protection technology.
Key Features
- Mersen J300043 electrical protection product.
- Designed for professional industrial electrical applications.
- Manufacturer-specific identification supports accurate replacement selection.
- Suitable for compatible power distribution and protection equipment.
- Professional-grade construction for demanding electrical environments.
- Suitable for panel-building, OEM and maintenance applications.
- Intended for use with correctly matched electrical equipment.
- Installation should be completed by qualified electrical personnel.
Dependable Support for Industrial Electrical Systems
Correctly selected circuit protection components help maintain the reliability and safety of industrial electrical equipment. They form part of a coordinated protection system intended to isolate electrical faults, protect connected components and reduce the risk of damage to machinery and power distribution infrastructure.
The Mersen J300043 should only be installed where its electrical characteristics, mechanical format and equipment compatibility match the original specification. Selection should be based on verified manufacturer data rather than appearance, product family or part-number similarity alone.
Typical Applications
- Industrial electrical control panels.
- Power distribution equipment.
- Switchgear and circuit protection assemblies.
- Machinery and automation systems.
- OEM electrical equipment.
- Maintenance, repair and replacement projects.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | J300043 | |
| Catalogue No | PC31UD69V550EF | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 550A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340322675 | |
| 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 Copper | |
| Connection/Terminal Type | Open Slot Blades | |
| Product Width | 51 mm | |
| Product Length | 109.4 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.2129 kg | |
| Sell Pack Width | 143 mm | |
| Sell Pack Length | 175 mm | |
| Sell Pack Height | 73 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.4043 kg | |
| Power Dissipation at Rated Current Value | 75 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen J300043 used for?
The Mersen J300043 is an industrial electrical protection component intended for use in compatible power distribution, control or equipment protection systems.
Can the J300043 replace another component?
It should only replace a component with matching electrical ratings, operating characteristics, dimensions and terminal requirements. Compatibility must be verified before installation.
Which specifications should be checked before ordering?
Confirm the product function, current and voltage ratings, protection characteristics, physical dimensions, mounting arrangement and equipment compatibility.
Is the Mersen J300043 suitable for industrial equipment?
It is intended for professional electrical applications, provided its specifications and mechanical configuration match the requirements of the equipment.
Who should install the J300043?
Installation or replacement should be completed by a qualified electrical professional following the equipment manufacturer’s instructions and applicable electrical safety procedures.
Trusted Industrial Electrical Protection
Mersen electrical protection products are selected by engineers, panel builders and maintenance professionals to support safe and dependable operation across demanding industrial electrical applications.
