Why Choose the Mersen R300027 Protistor® High-Speed Fuse?
The Mersen R300027 (PC31UD69V700D1A) is a premium Protistor® Size 31 square body high-speed semiconductor fuse engineered to provide ultra-fast protection for today's power conversion equipment. Featuring an aR ultra-fast operating characteristic, it is specifically designed to protect diodes, thyristors, IGBTs and other semiconductor devices against damaging short-circuit currents.
Manufactured using precision die-cut silver fuse elements embedded in solidified sand, the R300027 provides excellent current limitation, low let-through energy and a high interrupting rating. Silver-plated contacts, non-magnetic hardware and an integrated striker indicator deliver dependable long-term operation while simplifying maintenance and remote monitoring.
Rated at 700 A, with a 690 V AC IEC and 700 V AC UL voltage rating, the Mersen R300027 is ideally suited to protecting industrial drives, power converters, UPS systems, renewable energy equipment and other demanding semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 700 A current rating.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Outstanding current-limiting performance with low I²t values.
- Integrated striker indicator for simplified maintenance.
- Designed specifically for the protection of IGBTs, thyristors and diode modules.
Key Features
- Mersen Protistor® Size 31 series.
- Catalogue number: PC31UD69V700D1A.
- aR ultra-fast operating characteristic.
- 700 A rated current.
- 690 V AC (IEC) / 700 V AC (UL).
- DIN 110 blade terminals.
- Integrated striker indicator.
- Ceramic square body with silver-plated contact surfaces.
Reliable Protection for Power Electronics
Protistor® semiconductor fuses are specifically designed to interrupt fault currents before expensive semiconductor devices can be damaged. Their ultra-fast response and exceptionally low let-through energy help improve equipment reliability, minimise downtime and reduce maintenance costs.
The Size 31 Protistor® range is widely used throughout industrial automation, motor drives, renewable energy systems, UPS installations and power conversion equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable speed drives (VSDs).
- Industrial motor control systems.
- Power converters and inverters.
- Industrial rectifiers.
- UPS systems.
- Renewable energy power conversion equipment.
- Protection of IGBTs, thyristors and diode modules.
