High-speed aR fuse designed for semiconductor protection rated at 315A, 1250VAC IEC, 1300VAC UL with striker indication and DIN 110 blade terminals.
£169.93
The Mersen Q300555 (PC72UD13C315D1A) is a premium square body semiconductor protection fuse designed to provide ultra-fast protection for sensitive power electronic equipment. Part of the trusted Mersen Protistor® Size 72 series, this aR high-speed fuse delivers exceptional protection for IGBTs, thyristors, diodes and other semiconductor devices used in industrial power conversion systems.
Engineered for demanding industrial environments, the Q300555 offers excellent current limitation and low let-through energy to reduce damage caused by short-circuit faults. Its ceramic body, silver-plated contacts and integrated striker indicator provide long-term reliability, making it an ideal choice for OEMs, panel builders and maintenance engineers.
With a rated current of 315 A and a 1250 V AC IEC / 1300 V AC UL voltage rating, this fuse is perfectly suited for protecting high-power drives, inverters, UPS systems, renewable energy installations and industrial power converters.
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive semiconductor devices can be damaged. Their ultra-fast response and exceptionally low let-through energy provide superior protection compared with conventional industrial fuses, helping maximise equipment reliability and minimise downtime.
The Protistor® range from Mersen is trusted globally across industrial automation, renewable energy, UPS installations and variable speed drives where dependable semiconductor protection is critical for safe and efficient operation.
| Current | 11 A |
|---|---|
| Item number | Q300555 |
| Catalogue No | PC72UD13C315D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1250VAC IEC 1300VAC UL 315A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340330151 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 315 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 72 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 125 kA²s |
| Melting I2t | 15.1 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 | 59 mm |
| Product Length | 133.4 mm |
| Product Height | 63 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.1099 kg |
| Sell Pack Width | 142 mm |
| Sell Pack Length | 194 mm |
| Sell Pack Height | 72 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.7033 kg |
| Power Dissipation at Rated Current Value | 76 W |
| HS Code | 85351000 |
The Q300555 protects sensitive semiconductor devices such as IGBTs, thyristors and diodes from damaging short-circuit currents.
The fuse has a 315 A rated current.
It is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The aR classification indicates an ultra-fast semiconductor protection fuse designed specifically to protect power electronic components against short-circuit faults.
It is widely used in industrial drives, UPS systems, renewable energy equipment, power converters and other high-performance electronic power systems.
Mersen Protistor® semiconductor fuses are trusted worldwide by machine builders, panel manufacturers and industrial engineers to provide reliable protection for high-value power electronic equipment operating in demanding applications.
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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...