Why Choose the Mersen Q302165 Protistor® High-Speed Fuse?
The Mersen Q302165 (A070UD32KI350) is a premium square body semiconductor protection fuse engineered to provide ultra-fast protection for modern power electronic equipment. Part of the renowned Mersen Protistor® Size 32 series, this aR fuse is specifically designed to protect diodes, thyristors, IGBT modules and other semiconductor devices from damaging short-circuit currents.
Designed for demanding industrial applications, the Q302165 combines exceptional current-limiting performance with low let-through energy to minimise damage during electrical faults. Its ceramic square body, silver-plated contacts, slotted blade terminals and integrated striker indicator provide dependable operation and simplified maintenance.
With a 350 A current rating, 690 V AC IEC and 700 V AC UL voltage ratings, the Mersen Q302165 is ideally suited for variable speed drives, industrial inverters, rectifiers, UPS systems and other high-power conversion equipment requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 350 A current rating for industrial power electronics.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Designed for protection of IGBTs, thyristors and power semiconductor devices.
- Low I²t characteristics help minimise equipment damage during faults.
- Integrated striker indicator for convenient fuse monitoring.
Key Features
- Mersen Protistor® Size 32 series.
- Catalogue number: A070UD32KI350.
- 350 A rated current.
- 690 V AC (IEC) / 700 V AC (UL).
- Ultra-fast aR operating characteristic.
- Square body ceramic construction.
- Short slotted blade terminals.
- Integrated striker indicator with optional microswitch compatibility.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive semiconductor components can be damaged. Their exceptionally fast operating speed and low let-through energy help maximise equipment reliability while reducing maintenance costs and production downtime.
The Protistor® range from Mersen is trusted globally in industrial automation, renewable energy, motor drives, UPS installations and power conversion equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable speed drives (VSDs).
- Industrial motor control equipment.
- Power converters and inverters.
- Industrial rectifiers.
- UPS and backup power systems.
- Protection of IGBTs, thyristors and semiconductor devices.
