High-speed Protistor® fuse with aR characteristic for semiconductor protection, rated 315A at 1250VAC IEC and 1300VAC UL, featuring open slot blades and integrated striker indication.
£209.85
The Mersen V300628 is a premium Protistor® square body high-speed semiconductor fuse engineered to provide exceptional protection for sensitive power electronic devices operating in demanding industrial applications. Designed with an ultra-fast aR operating characteristic, it rapidly clears short circuits to help protect IGBTs, thyristors, diodes and other semiconductor components from costly damage.
As part of the proven Mersen Protistor® Size 73 series, the V300628 combines high breaking capacity with low let-through energy (I²t), making it an excellent choice for modern power conversion equipment. Its robust square body construction, silver-plated contacts and integrated striker indicator provide dependable operation and simplified maintenance.
With a rated current of 315 A and a 1250 V AC IEC / 1300 V AC UL voltage rating, the V300628 is ideally suited to industrial drives, renewable energy systems, UPS equipment, power converters and traction applications where reliable semiconductor protection is essential.
High-speed semiconductor fuses are specifically designed to interrupt fault currents before they can damage expensive semiconductor devices. Their extremely fast operation limits thermal and electrical stress, helping extend the service life of converters, drives and other critical industrial equipment.
The Mersen Protistor® Size 73 range is widely specified by OEMs and industrial engineers for high-voltage power conversion systems where dependable semiconductor protection and high interrupting performance are required.
| Item number | V300628 |
|---|---|
| Catalogue No | PC73UD13C315EF |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 315A With Striker Open Slot Blades |
| EAN/UPC Code | 3605340331233 |
| 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 | 73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 95 kA²s |
| Melting I2t | 12 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 | Open Slot Blades |
| Product Width | 73 mm |
| Product Length | 149.4 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 1.11 kg |
| Sell Pack Width | 110 mm |
| Sell Pack Length | 180 mm |
| Sell Pack Height | 80 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.11 kg |
| Power Dissipation at Rated Current Value | 84 W |
| HS Code | 85351000 |
The V300628 is designed to protect semiconductor devices such as IGBTs, thyristors and diodes against damaging short-circuit currents in industrial power electronic equipment.
The Mersen V300628 has a 315 A current rating.
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The aR characteristic provides ultra-fast short-circuit protection specifically for semiconductor devices while allowing normal operating conditions.
The fuse is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other semiconductor-based power conversion systems.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs and industrial engineers for delivering reliable protection of critical semiconductor devices in demanding industrial power systems.
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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...