Why Choose the Mersen R301223 High-Speed Semiconductor Fuse?
The Mersen R301223, catalogue reference PC71UD13C350D3A, is a genuine Protistor® Size 71 high-speed semiconductor fuse developed to provide rapid short-circuit protection for sensitive power semiconductor devices. It is rated at 350A and designed for systems operating up to 1250VAC with an aR operating characteristic for semiconductor protection.
Engineered for demanding industrial applications, the R301223 helps protect diodes, thyristors, IGBTs and other semiconductor devices by limiting fault current and reducing let-through energy. The fuse incorporates a D3A striker indicator to provide local blown-fuse indication or operate a compatible microswitch for remote signalling.
Its square ceramic body and robust blade terminal construction make the Mersen R301223 suitable for industrial drives, power converters, rectifiers, renewable energy equipment and other high-performance power electronic systems requiring dependable semiconductor protection.
Key Benefits
- Ultra-fast aR semiconductor protection.
- 350A current rating.
- 1250VAC rated voltage.
- Designed specifically for semiconductor protection.
- D3A striker for blown-fuse indication.
- Square-body industrial construction.
- Suitable for demanding power electronic applications.
- Manufactured by Mersen under the Protistor® range.
Key Features
- Mersen Protistor® Size 71 semiconductor fuse.
- Manufacturer part number: R301223.
- Catalogue number: PC71UD13C350D3A.
- Square-body high-speed fuse.
- aR operating characteristic.
- 350A rated current.
- 1250VAC rated voltage.
- D3A striker indication.
- Designed for semiconductor protection.
- Industrial-grade ceramic body.
- Suitable for bolted installation.
- RoHS compliant.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- Rectifiers.
- Inverters.
- UPS systems.
- Renewable energy converters.
- Battery energy storage systems.
- Industrial automation equipment.
- IGBT module protection.
- Protection of thyristors and power diodes.
Designed for Reliable Semiconductor Protection
Protistor® semiconductor fuses are engineered to minimise the damaging effects of short-circuit currents on expensive semiconductor devices. Their high-speed current-limiting performance helps improve equipment reliability while reducing downtime and repair costs in demanding industrial environments.
