High-speed Protistor® fuse with a robust ceramic square body, striker flush ends, and metric threads designed for 280A AC applications up to 1300V UL and 1200V IEC.
£134.16
The Mersen N300714, catalogue number PC70UD12C280TF, is a premium Protistor® square body high-speed semiconductor fuse designed to provide exceptional protection for sensitive power electronic equipment. Engineered for demanding industrial applications, this ultra-fast acting fuse safeguards semiconductors including IGBTs, thyristors, diodes and power modules against damaging short circuits and overcurrent conditions.
As part of the trusted Mersen Protistor® Size 70 series, the N300714 combines excellent current-limiting characteristics with a high breaking capacity, helping minimise equipment damage and reduce costly downtime. Its compact square body design, silver-plated contacts and integrated striker indicator make it an ideal solution for modern power conversion and automation systems.
With a rated current of 280 A and a 1200 V AC IEC / 1300 V AC UL voltage rating, the Mersen N300714 is ideally suited for protecting industrial motor drives, converters, UPS systems, renewable energy inverters and other high-power electronic equipment.
High-speed semiconductor fuses are specifically engineered to protect sensitive power electronic components by rapidly clearing fault currents before permanent damage occurs. The Mersen Protistor® range delivers low let-through energy and high interrupting capacity, helping maximise equipment reliability and minimise maintenance costs.
The N300714 is widely used in high-power industrial applications where dependable semiconductor protection is essential. Its advanced construction ensures reliable performance in demanding electrical environments while supporting long-term operational safety.
| Item number | N300714 |
|---|---|
| Catalogue No | PC70UD12C280TF |
| Description | Square Body High-Speed Fuse Protistor® Size 70 aR 1200VAC IEC 1300VAC UL 280A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340332568 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1200 V |
| Ampere Rating | 280 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 70 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 106000 A²s |
| Melting I2t | 14200 A²s |
| 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 | 39.8 mm |
| Product Length | 74 mm |
| Product Height | 49.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.017 kg |
| Sell Pack Width | 85 mm |
| Sell Pack Length | 133 mm |
| Sell Pack Height | 55 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.339 kg |
| Power Dissipation at Rated Current Value | 61 W |
| HS Code | 85351000 |
The N300714 protects semiconductor devices such as IGBTs, thyristors and diodes used in industrial power conversion and motor control systems.
This fuse has a 280 A rated current.
The fuse is rated for 1200 V AC (IEC) and 1300 V AC (UL) applications.
It is a Protistor® Size 70 ultra-fast acting aR square body semiconductor protection fuse with striker indication.
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other power electronic applications requiring high-speed semiconductor protection.
Mersen Protistor® semiconductor fuses are widely trusted by engineers and OEM manufacturers for providing dependable high-speed protection in industrial automation, power conversion and renewable energy applications.
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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...