Fast-acting square body high-speed fuse with integrated striker and plain blades, rated 630A at 1100VAC IEC and 1200VAC UL, providing reliable semiconductor protection.
£259.37
The Mersen N301220 is an industrial fuse-link designed to provide dependable overcurrent and short-circuit protection for compatible electrical equipment. Manufactured by Mersen, a recognised specialist in electrical protection, this fuse helps safeguard industrial machinery, power-control assemblies and automation systems against potentially damaging fault currents.
Industrial fuse-links interrupt excessive electrical current before it can cause extensive damage to cables, components and connected equipment. The Mersen N301220 is suitable for maintenance, replacement and original equipment applications where reliable circuit protection and consistent operating performance are required.
Before installation, the rated current, voltage rating, utilisation category, breaking capacity, dimensions and terminal configuration should be verified using the markings on the fuse or the latest official Mersen technical documentation. Correct fuse selection is essential because products with similar physical dimensions may provide significantly different electrical protection characteristics.
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 N301220, 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 different operating characteristics.
| Item number | N301220 |
|---|---|
| Catalogue No | PC72UD11C630PA |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1100VAC IEC 1200VAC UL 630A With Striker Plain Blades |
| EAN/UPC Code | 3605340338348 |
| Rated voltage AC UL | 1200 V |
| Rated voltage AC IEC | 1100 V |
| Ampere Rating | 630 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 72 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 690 kA²s |
| Melting I2t | 106.3 kA²s |
| AC Max I.R./Breaking Capacity | I1: 150 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | Plain Blades |
| Product Width | 59 mm |
| Product Length | 149.4 mm |
| Product Height | 63 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.3298 kg |
| Sell Pack Width | 160 mm |
| Sell Pack Length | 202 mm |
| Sell Pack Height | 80 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.7766 kg |
| Power Dissipation at Rated Current Value | 125 W |
| HS Code | 85351000 |
The Mersen N301220 is used to provide overcurrent and short-circuit protection within compatible industrial electrical equipment, control systems and power assemblies.
Check the current rating, voltage rating, utilisation category and breaking capacity printed on the fuse-link or listed in the latest official Mersen technical documentation.
A substitute should only be installed when its current rating, voltage rating, utilisation category, breaking capacity, dimensions and terminal arrangement match the original specification.
It may be installed in a compatible fuse holder, control panel, switchgear assembly or industrial equipment enclosure, subject to the equipment manufacturer's requirements.
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.
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.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
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.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...