The PC71UD13C400D1A offers reliable high-speed protection for power electronics, providing rapid response to overcurrent conditions up to 400A at 1250VAC (IEC) and 1300VAC (UL). Its square body design and integrated striker ensure accurate trip indication and easy integration into DIN 110 blade systems.
£156.00
The Mersen J300549 is an industrial high-speed semiconductor fuse developed to protect sensitive power electronic components against damaging short-circuit currents. As part of Mersen’s established Protistor® fuse range, it is intended for demanding applications where rapid fault interruption and effective current limitation are essential.
The J300549 helps protect components such as IGBTs, thyristors, rectifiers and power diodes by limiting the thermal and electrical energy released during a fault. Its high-speed operating characteristics can reduce the risk of extensive equipment damage, improve system reliability and minimise costly production downtime.
Designed for use within industrial power conversion equipment, the Mersen J300549 is suitable for applications including variable speed drives, converters, inverters, uninterruptible power supplies and specialist power control systems. Its robust industrial construction supports dependable operation in electrical panels, machinery and OEM equipment.
High-speed semiconductor fuses are engineered to interrupt severe fault currents more rapidly than conventional general-purpose fuses. This reduces the amount of electrical and thermal energy reaching vulnerable semiconductor components and helps prevent faults from causing extensive damage to connected equipment.
Mersen Protistor® fuses are used in power electronic systems where dependable short-circuit protection is critical. Selecting the correct fuse for the circuit can help extend equipment service life, reduce maintenance requirements and improve the operational availability of industrial machinery.
| Current | 11 A |
|---|---|
| Item number | J300549 |
| Catalogue No | PC71UD13C400D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 400A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340330076 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 400 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 71 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 308 kA²s |
| Melting I2t | 38 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 | 80 W |
| HS Code | 85351000 |
The Mersen J300549 is used to provide high-speed short-circuit protection for semiconductor devices installed in industrial power electronic equipment.
It is intended for applications containing sensitive components such as IGBTs, thyristors, rectifiers and power diodes.
A high-speed fuse interrupts fault currents rapidly and limits the energy reaching sensitive semiconductor components, helping reduce the risk of costly equipment damage.
It may be installed in industrial drives, converters, inverters, UPS systems, power supplies and other power conversion equipment.
Replacement is appropriate only when the voltage rating, current rating, operating characteristic, dimensions and mounting arrangement match the requirements specified by the equipment manufacturer.
Mersen Protistor® high-speed fuses are trusted in industrial power electronic systems where rapid fault interruption, effective current limitation and dependable semiconductor protection are essential.
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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...