High-speed aR characteristic fuse with 280A rating, suitable for semiconductor protection and industrial applications. Features integrated striker indication and DIN 110 blade terminals.
£145.72
The Mersen K300711 is an industrial electrical protection component designed for use in compatible power distribution, machinery and automation systems. Manufactured by Mersen, a recognised specialist in circuit protection, the K300711 supports reliable fault interruption in professionally engineered electrical installations.
Mersen industrial fuses are designed to protect cables, conductors and valuable electrical equipment against potentially damaging overcurrent and short-circuit conditions. Their robust construction makes them suitable for control panels, production machinery, power conversion equipment and other demanding industrial applications.
The precise current rating, voltage rating, utilisation category, breaking capacity and physical dimensions of the K300711 should be confirmed from the product label or official Mersen technical documentation before purchase or installation. Correct fuse selection is essential for dependable protection, effective circuit coordination and safe equipment operation.
Industrial fuses operate by safely interrupting excessive current before it can cause serious thermal damage to conductors, switching equipment or connected machinery. Correctly coordinated fuse protection can reduce equipment damage, improve installation reliability and minimise unplanned production downtime.
The Mersen K300711 should be selected according to the circuit voltage, normal operating current, prospective short-circuit current, equipment characteristics and applicable electrical regulations. Replacement fuses must provide compatible electrical performance and physical dimensions.
| Current | 11 A |
|---|---|
| Item number | K300711 |
| Catalogue No | PC71UD13C280D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 280A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340332537 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 280 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 71 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 96 kA²s |
| Melting I2t | 12 kA²s |
| AC Max I.R./Breaking Capacity | I1: 126 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | DIN 110 Blades |
| Product Width | 51 mm |
| Product Length | 133.4 mm |
| Product Height | 56.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.56 kg |
| Sell Pack Width | 142 mm |
| Sell Pack Length | 166 mm |
| Sell Pack Height | 62 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.52 kg |
| Power Dissipation at Rated Current Value | 70 W |
| HS Code | 85351000 |
The Mersen K300711 is used as an electrical protection component in compatible industrial circuits, machinery and power distribution equipment.
The rated current, voltage, utilisation category and breaking capacity should be confirmed from the fuse label or the official Mersen technical datasheet before installation.
It should only replace another fuse when the electrical ratings, operating characteristics, terminal arrangement and physical dimensions are fully compatible.
The fuse should be selected and installed by a suitably qualified electrical professional in accordance with the equipment instructions and applicable electrical regulations.
It may be installed in compatible industrial control panels, machinery, power distribution systems and electrical protection assemblies.
Mersen circuit protection products are used by engineers, panel builders, equipment manufacturers and maintenance professionals to protect critical electrical systems against damaging fault conditions.
● 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...