Why Choose the Mersen S302167 High-Speed Semiconductor Fuse?
The Mersen S302167 is a premium Protistor® square body high-speed semiconductor fuse engineered to provide exceptional protection for sensitive power electronic devices. Designed for demanding industrial applications, this ultra-fast aR class fuse safeguards diodes, thyristors, IGBTs and other semiconductor components against short-circuit faults while helping minimise damage and costly downtime.
As part of the trusted Mersen Protistor® Size 32 series, the S302167 delivers reliable high-speed protection for variable frequency drives, UPS systems, power converters, motor drives and industrial automation equipment. Its robust square body construction and silver-plated contacts ensure dependable electrical performance in demanding environments.
With a 350 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and high interrupting capacity, the Mersen S302167 provides the fast fault clearing required to protect valuable semiconductor devices while maintaining system reliability.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for sensitive power electronics.
- 350 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- High breaking capacity for enhanced equipment protection.
- Square body design with long slotted blade terminals for secure installation.
- Low let-through energy (I²t) helps minimise semiconductor damage.
- Suitable for OEM equipment, industrial drives and power conversion systems.
Key Features
- Mersen Protistor® Size 32 semiconductor fuse.
- Catalogue number: A070UD32LI350.
- 350 A rated current.
- 690 V AC IEC / 700 V AC UL operating voltage.
- aR ultra-fast operating characteristic.
- Square body construction with long slotted blade terminals.
- Integrated striker indicator for fuse status monitoring.
- Silver-plated contacts for reliable electrical performance.
- Designed for semiconductor and power electronics protection.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically engineered to clear fault currents before sensitive semiconductor devices can be damaged. The Mersen S302167 combines rapid fault interruption with low energy let-through, making it an ideal solution for protecting expensive power electronic equipment.
Its proven Protistor® technology is widely used across industrial automation, renewable energy, motor control and power conversion applications where dependable semiconductor protection is essential for maintaining uptime and equipment reliability.
Typical Applications
- Variable frequency drives (VFDs).
- Motor drives and soft starters.
- Power converters and inverters.
- UPS and backup power systems.
- Industrial automation equipment.
- Semiconductor power supplies.
- Renewable energy conversion systems.
- OEM electrical equipment.
