Why Choose the MERSEN FUSE 12,5 URD 70 D11 A 0050 12,5URD70D11A0050? MERSEN FUSE 12,5 URD 70 D11 A 0050 12,5URD70D11A0050 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 12,5 URD 70 D11 A 0050 12,5URD70D11A0050 – 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 12,5 URD 70 D11 A 0050 12,5URD70D11A0050 – 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.
£98.50
The Mersen J301906 is a Protistor® Size 70 aR square body high-speed semiconductor fuse engineered to provide superior protection for sensitive semiconductor devices operating in demanding industrial power conversion systems. Designed for rapid fault interruption, it minimises let-through energy during short-circuit conditions, helping to protect expensive power electronic components and maximise equipment uptime.
Manufactured using pure silver fuse elements embedded in solidified sand with silver-plated contact surfaces, the J301906 delivers excellent current-limiting performance and high interrupting capacity. It incorporates a low-voltage striker indicator that can operate an optional microswitch for remote status indication, making maintenance faster and improving system monitoring.
With a 50 A rated current, 1250 V AC IEC / 1300 V AC UL voltage rating, bolted DIN 110 blade terminals and a Size 70 square body, the J301906 is ideally suited to rectifiers, variable speed drives, inverters, UPS systems and other industrial power conversion equipment.
The Mersen J301906 has been specifically developed to protect modern semiconductor devices including SCRs, thyristors, diodes, GTOs and IGBTs. Its ultra-fast operating characteristics minimise damage during short-circuit events while maintaining excellent cycling capability for demanding industrial environments.
Protistor® semiconductor fuses are trusted by equipment manufacturers worldwide for use in high-performance power conversion systems where dependable semiconductor protection is essential.
| Current | 11 A |
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It is designed to protect semiconductor devices including SCRs, thyristors, diodes, IGBTs and GTOs from damaging short-circuit currents.
The fuse has a rated current of 50 A.
The J301906 is rated for 1250 V AC (IEC) and 1300 V AC (UL) applications.
Yes. It incorporates a low-voltage striker indicator that can operate an optional microswitch for remote indication.
Typical applications include drives, rectifiers, converters, UPS systems, renewable energy equipment and industrial power electronic installations.
Mersen Protistor® semiconductor fuses are recognised globally for delivering dependable, ultra-fast protection for industrial power electronics, helping maximise equipment reliability while safeguarding valuable semiconductor devices.
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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...