Why Choose the Mersen K300527 Protistor® High-Speed Fuse?
The Mersen K300527 (A070UD30LI450) is a premium square body high-speed semiconductor fuse from the trusted Protistor® Size 30 series. Featuring an ultra-fast aR operating characteristic, it has been specifically engineered to protect sensitive semiconductor devices including IGBTs, thyristors, diodes and MOSFETs used in demanding industrial power conversion applications.
Manufactured using Mersen's advanced Protistor® technology, the K300527 provides rapid fault interruption with exceptionally low let-through energy, helping minimise damage to expensive semiconductor components during short-circuit conditions. Its ceramic square body, silver-plated contacts and solidified quartz sand construction deliver excellent electrical performance, high interrupting capacity and dependable long-term reliability.
Rated at 450 A with a 690 V AC IEC / 700 V AC UL voltage rating, this fuse features long slotted blade terminals with an integrated striker indicator, making it ideal for variable speed drives, UPS systems, industrial converters, rectifiers and renewable energy installations.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 450 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors, diodes and MOSFET devices.
- 200 kA breaking capacity for dependable fault interruption.
- Integrated striker indicator for remote fuse monitoring.
Key Features
- Mersen Protistor® Size 30 series.
- Catalogue number A070UD30LI450.
- 450 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Long slotted blade terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Ceramic body with solidified quartz sand arc-quenching technology.
- Low I²t for optimum semiconductor protection.
Reliable Semiconductor Protection for Industrial Power Systems
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive power electronic components can be damaged. Their ultra-fast operation and low let-through energy improve equipment reliability while reducing maintenance costs and unplanned downtime. Mersen's Protistor® range is widely specified by OEMs for industrial drives, converters, UPS systems and renewable energy equipment.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- IGBT inverter protection.
- Thyristor and diode rectifiers.
- UPS systems.
- Renewable energy inverters.
- Motor control centres.
- Industrial automation equipment.
