Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE 8 URD 71 TT F 0900 N301289
High-speed Protistor® fuse designed for semiconductor protection up to 900A, with ceramic square body, flush ends with metric threads, and striker indication system. Complies with IEC and UL standards.
£144.79
Why Choose the Mersen N301289 Industrial Fuse-Link?
The Mersen N301289 is an industrial fuse-link designed to provide dependable electrical circuit protection in compatible power-control, automation and industrial equipment applications. Manufactured by Mersen, a recognised specialist in electrical protection, this fuse helps safeguard valuable components and connected equipment against potentially damaging overcurrent and short-circuit conditions.
Industrial fuse-links interrupt excessive fault current before it can cause extensive damage to cables, control components or machinery. The Mersen N301289 is suitable for maintenance, replacement and OEM requirements where dependable operation and correctly coordinated circuit protection are essential.
Before installation, the fuse’s rated current, rated voltage, utilisation category, breaking capacity, physical dimensions and terminal configuration should be verified from the product markings or official Mersen technical documentation. Correct specification matching is essential because physically similar fuse-links may provide different electrical operating characteristics.
Key Advantages
- Dependable industrial overcurrent and short-circuit protection.
- Manufactured by the established Mersen electrical protection brand.
- Helps protect cables, components and connected industrial equipment.
- Suitable for maintenance, replacement and OEM applications.
- Designed for use in compatible fuse holders and equipment assemblies.
- Supports improved equipment reliability and reduced unplanned downtime.
Key Features
- Mersen industrial fuse-link.
- Item number: N301289.
- Designed for electrical circuit and equipment protection.
- Industrial-grade construction for dependable operation.
- Suitable for compatible power-control and automation systems.
- Helps isolate potentially damaging electrical fault currents.
- Suitable for planned maintenance and replacement programmes.
- Genuine Mersen electrical protection component.
Reliable Protection for Industrial Electrical Equipment
Industrial fuse-links protect electrical systems by opening the circuit when current exceeds their specified operating limits. A correctly selected fuse can restrict fault energy, protect downstream components and reduce the risk of extensive damage to machinery, control panels and power-distribution equipment.
When replacing the Mersen N301289, engineers should verify the complete product reference together with the current rating, voltage rating, utilisation category, breaking capacity, dimensions and terminal arrangement. Replacement based solely on physical appearance is not recommended because visually similar fuse-links may offer significantly different protection characteristics.
Typical Applications
- Industrial control panels and electrical cabinets.
- Power distribution and switchgear assemblies.
- Motor-control and power-conversion equipment.
- Manufacturing and processing machinery.
- Industrial automation systems.
- OEM equipment and electrical maintenance programmes.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 800 V | |
| Item number | N301289 | |
| Catalogue No | PC71UD80V900TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 800VAC IEC 850VAC UL 900A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340339284 | |
| Rated voltage AC UL | 850 V | |
| Rated voltage AC IEC | 800 V | |
| Ampere Rating | 900 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 2010 kA²s | |
| Melting I2t | 446 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 150 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 | 74 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.545 kg | |
| Sell Pack Width | 90 mm | |
| Sell Pack Length | 170 mm | |
| Sell Pack Height | 70 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.515 kg | |
| Power Dissipation at Rated Current Value | 100 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen N301289 used for?
The Mersen N301289 is used to provide overcurrent and short-circuit protection within compatible industrial electrical equipment, control systems and power assemblies.
How can I confirm the electrical rating of the N301289?
Check the rated current, rated voltage, utilisation category and breaking capacity printed on the fuse-link or listed in the official Mersen technical documentation.
Can the N301289 be replaced with a different fuse?
A substitute should only be installed when its current rating, voltage rating, utilisation category, breaking capacity, dimensions and terminal arrangement match the original specification.
Where is the Mersen N301289 typically installed?
It may be installed in a compatible fuse holder, control panel, switchgear assembly or industrial equipment enclosure, subject to the equipment manufacturer’s requirements.
Who should install or replace this fuse?
The fuse should be installed by a suitably qualified electrical professional after the equipment has been safely isolated and all required specifications have been verified.
Trusted Electrical Protection from Mersen
Mersen electrical protection products are used by industrial engineers, equipment manufacturers and maintenance professionals to support reliable operation across power distribution, machinery and automation applications.
