High-speed aR characteristic fuse with ceramic square body, rated 350A for 690VAC IEC and 700VAC UL applications, featuring striker indication and open slot blades for secure bolted mounting.
£141.76
The Mersen N300047 is an industrial electrical protection component designed to help safeguard circuits and connected equipment against damaging overcurrent and short-circuit conditions. Manufactured by Mersen, a recognised specialist in electrical power protection, this fuse is suitable for maintenance, repair and replacement applications within industrial electrical systems.
Engineered for dependable circuit protection, the Mersen N300047 provides a controlled interruption point when electrical current exceeds the fuse’s specified operating limits. This helps reduce the risk of damage to cables, semiconductor components, control equipment and other valuable electrical assets.
The N300047 fuse is particularly suitable for engineers, panel builders and maintenance professionals seeking a genuine Mersen replacement component. Before installation, the fuse rating, voltage, operating class, dimensions and connection format should be checked against the equipment documentation or the markings on the original fuse.
Industrial fuses provide an essential layer of protection by disconnecting a circuit when excessive current creates a risk to equipment or wiring. Correctly selected fuse protection can minimise electrical damage, improve system safety and reduce the duration and cost of unplanned equipment downtime.
For safe and reliable operation, replacement fuses should match the electrical characteristics and physical configuration specified by the equipment manufacturer. The Mersen N300047 reference should therefore be verified against the original component before the replacement is installed or energised.
| Item number | N300047 |
|---|---|
| Catalogue No | PC31UD69V350EF |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 350A With Striker Open Slot Blades |
| EAN/UPC Code | 3605340322712 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 350 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 31 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 61000 A²s |
| Melting I2t | 10300 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 | 67 W |
| HS Code | 85361090 |
| Country of Manufacture | France |
The Mersen N300047 is used to protect compatible industrial electrical circuits and equipment against excessive current and short-circuit faults.
Yes. It may be used as a replacement where Mersen N300047 is the specified reference and all electrical ratings, dimensions and connection details match the original component.
Check the N300047 reference, current rating, voltage rating, operating class, physical dimensions and terminal format against the original fuse and the equipment manufacturer’s documentation.
Using the correct fuse rating ensures that the circuit receives the intended level of protection. An incorrectly rated fuse may operate unnecessarily or fail to protect the equipment adequately.
The fuse should be selected and installed by a suitably qualified electrical professional in accordance with the equipment instructions and applicable electrical safety requirements.
Mersen electrical protection products are used by engineers, equipment manufacturers and maintenance professionals to support reliable fault protection in industrial power and automation systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...