High-speed Protistor® fuse offering superior protection for sensitive power semiconductor devices with 200A rating and compliance with IEC and UL standards. Features robust DIN 110 blades and integrated striker for reliable operation and clear fuse status indication.
£121.84
The Mersen A300541 is a high-performance Protistor® square body high-speed semiconductor fuse engineered to provide exceptional protection for sensitive power electronic equipment. Designed for demanding industrial applications, it offers rapid fault interruption to safeguard semiconductors including diodes, thyristors, GTOs and IGBT modules.
As part of the trusted Mersen Protistor® Size 70 series, the A300541 combines high breaking capacity with low let-through energy, helping reduce equipment damage during short-circuit conditions. Its robust construction, silver-plated contacts and precision-engineered fuse elements ensure dependable performance in power conversion and industrial automation systems.
With a 200 A current rating and 1250 V AC IEC / 1300 V AC UL voltage rating, the A300541 is ideal for protecting variable speed drives, UPS systems, soft starters, inverters and other semiconductor-based power equipment. The integrated striker indicator allows easy fuse status monitoring and supports remote indication when used with compatible accessories.
High-speed semiconductor fuses are specifically designed to protect sensitive power electronic devices against damaging short-circuit currents. Their extremely fast operating characteristics minimise energy let-through, helping to reduce downtime and extend the service life of expensive electronic components.
The Mersen Protistor® range is widely specified by OEMs and maintenance engineers for use in industrial power conversion equipment where dependable semiconductor protection is essential for system reliability and operational safety.
| Current | 11 A |
|---|---|
| Item number | A300541 |
| Catalogue No | PC70UD13C200D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 70 aR 1250VAC IEC 1300VAC UL 200A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340329995 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 200 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 70 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 38000 A²s |
| Melting I2t | 4730 A²s |
| 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 | 39.8 mm |
| Product Length | 133.4 mm |
| Product Height | 49.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.0899 kg |
| Sell Pack Width | 130 mm |
| Sell Pack Length | 140 mm |
| Sell Pack Height | 50 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.3633 kg |
| Power Dissipation at Rated Current Value | 56 W |
| HS Code | 85351000 |
The A300541 is designed to protect semiconductor devices such as IGBTs, thyristors, diodes and other sensitive power electronic components against short-circuit faults.
This fuse has a 200 A current rating.
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The aR classification indicates an ultra-fast semiconductor protection fuse designed specifically for short-circuit protection of power electronic devices.
The integrated striker provides visual indication of fuse operation and can be used to actuate compatible microswitches for remote signalling.
Mersen Protistor® semiconductor fuses are trusted worldwide by engineers, OEMs and industrial maintenance professionals for delivering reliable protection of critical power conversion and automation equipment.
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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...