Why Choose the Mersen C300612 High-Speed Semiconductor Fuse?
The Mersen C300612 is a premium Protistor® Size 71 high-speed semiconductor fuse designed to provide outstanding protection for sensitive power electronic components in demanding industrial applications. As part of the trusted Mersen Protistor® Size 71 aR series, it delivers ultra-fast fault interruption to safeguard IGBTs, thyristors, diodes and other semiconductor devices from destructive short-circuit currents.
Engineered specifically for modern power conversion equipment, the C300612 features precision die-cut fuse elements embedded in solidified sand to achieve exceptionally low let-through energy and high interrupting capacity. Silver-plated contact surfaces and non-magnetic hardware ensure dependable long-term performance in harsh industrial environments.
With a 350 A current rating, 1250 V AC IEC / 1300 V AC UL voltage rating and open slot blade terminals with an integrated striker, the Mersen C300612 is ideally suited for variable frequency drives, UPS systems, industrial inverters and renewable energy converters where reliable semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor fuse for protecting power electronic equipment.
- 350 A current rating for demanding industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Very low let-through energy helps minimise semiconductor damage.
- Integrated striker indicator for maintenance and remote monitoring.
- High interrupting capacity suitable for modern power conversion systems.
Key Features
- Mersen Protistor® Size 71 aR series.
- 350 A rated current.
- 1250 V AC IEC / 1300 V AC UL rated voltage.
- Ultra-fast aR operating characteristic.
- Open slot blade terminals (EF style).
- Integrated striker indication.
- Silver-plated contact surfaces.
- Designed for protecting IGBTs, SCRs, thyristors and power semiconductor modules.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are engineered to protect valuable power electronic components by rapidly interrupting fault currents before they can damage sensitive devices. Their low I²t performance reduces thermal stress on semiconductor assemblies, improving equipment reliability while reducing costly downtime.
The Mersen Protistor® range is widely specified by OEMs and industrial engineers for protecting variable frequency drives, industrial motor drives, UPS installations, renewable energy converters and other high-performance power conversion equipment.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and inverters.
- UPS and backup power systems.
- Renewable energy converters.
- Protection of IGBT, SCR and diode modules.
