Why Choose the Mersen Q302717 Protistor® High-Speed Fuse?
The Mersen Q302717 (PC73UD90V11CPA) is a premium Protistor® Size 73 square body high-speed semiconductor fuse engineered to provide ultra-fast protection for today's high-power conversion equipment. Designed with an aR operating characteristic, it offers outstanding short-circuit protection for diodes, thyristors, IGBTs and other sensitive semiconductor devices used in demanding industrial applications.
Manufactured using precision die-cut silver fuse elements embedded in solidified sand, the Q302717 delivers exceptional current limitation, low let-through energy and high interrupting capacity. Silver-plated contact surfaces, non-magnetic hardware and an integrated striker indicator ensure dependable long-term performance and simplified maintenance.
Rated at 1100 A with a 900 V AC IEC and 1000 V AC UL voltage rating, the Q302717 is ideally suited to protecting industrial drives, power converters, UPS systems, renewable energy equipment and other high-power semiconductor installations.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1100 A current rating for high-power industrial applications.
- 900 V AC IEC / 1000 V AC UL voltage rating.
- Excellent current-limiting performance with low I²t values.
- Integrated striker indicator for remote status indication.
- Designed specifically to protect IGBTs, thyristors and diode modules.
Key Features
- Mersen Protistor® Size 73 series.
- Catalogue number: PC73UD90V11CPA.
- aR ultra-fast operating characteristic.
- 1100 A rated current.
- 900 V AC (IEC) / 1000 V AC (UL).
- Plain blade terminals.
- Integrated striker indicator.
- Ceramic square body with silver-plated contact surfaces.
Reliable Protection for High-Power Electronics
Protistor® semiconductor fuses are specifically developed to interrupt fault currents before expensive semiconductor devices can be damaged. Their extremely fast operation and low let-through energy provide superior protection compared with conventional industrial fuses, improving equipment reliability and reducing maintenance costs.
The Size 73 range is widely used in industrial automation, renewable energy systems, UPS installations, motor drives 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.
