Why Choose the MERSEN FUSE 11 URD 70 D11 A 0400 11URD70D11A0400? MERSEN FUSE 11 URD 70 D11 A 0400 11URD70D11A0400 delivers robust, standards-compliant performance for demanding electrical applications. This model provides reliable protection and ease of installation, with all key features engineered for maximum safety and efficiency. Key Takeaways – Product Name: MERSEN FUSE 11 URD 70 D11 A 0400 11URD70D11A0400 – Key Specs: See description below Frequently Asked Questions – What is the primary application? – Is this product certified? – What are the installation options? – What are the key benefits? – Where can I find technical data? Speed & Safety Benefits – Reliable Performance: Engineered for consistent results – Safe Operation: Built to meet modern standards – Quick Installation: Designed for installer convenience Key Features of MERSEN FUSE 11 URD 70 D11 A 0400 11URD70D11A0400 – See full description below – Engineered for reliability – Technical support available What is the primary application?+ See product description for detailed use cases. Is this product certified?+ Consult technical data or documentation for certifications. What are the installation options?+ Refer to the installation manual or contact our team for guidance. What are the key benefits?+ Engineered for performance, reliability, and ease of use. Where can I find technical data?+ Technical datasheets are available on request or on our website.
£145.72
The Mersen F300868 (marked 11 URD 70 D11 A 0400) is a Protistor® square body high-speed semiconductor protection fuse designed to provide rapid short-circuit protection for sensitive power electronic equipment. Engineered specifically for protecting IGBTs, thyristors, diodes and semiconductor modules, it delivers ultra-fast fault interruption to minimise damage and costly downtime.
Featuring an aR ultra-fast operating characteristic, the F300868 provides low let-through energy (I²t), helping to protect valuable semiconductor devices from the damaging effects of high fault currents. Its robust square body construction incorporates DIN 110 slotted blade terminals and an integrated striker indicator for convenient fuse status monitoring.
With a 400 A current rating and a 1100 V AC voltage rating, the F300868 is ideally suited to industrial drives, power converters, renewable energy systems, UPS installations and other demanding power electronic applications requiring dependable semiconductor protection.
The Mersen F300868 is designed to interrupt high prospective fault currents before they can damage expensive semiconductor devices. Its ultra-fast operating characteristics and low let-through energy help maximise equipment reliability while reducing maintenance costs and production downtime.
Protistor® semiconductor fuses are widely specified by OEMs and electrical engineers for applications where dependable protection of power semiconductors is essential, including industrial automation, renewable energy systems and heavy-duty power conversion equipment.
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The F300868 is a high-speed semiconductor protection fuse designed to protect sensitive power electronic devices such as IGBTs, thyristors and diodes against short-circuit faults.
The Mersen F300868 has a 400 A current rating.
This fuse has a rated operating voltage of 1100 V AC.
The aR designation identifies an ultra-fast semiconductor protection fuse intended specifically for short-circuit protection of power electronic devices.
It is commonly installed in industrial drives, converters, UPS systems, renewable energy installations and other power electronic equipment requiring fast semiconductor protection.
Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers, OEMs and industrial manufacturers for protecting valuable semiconductor equipment in demanding industrial environments.
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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...