Why Choose the Mersen D300544 Protistor® High-Speed Semiconductor Fuse?
The Mersen D300544 is a genuine Protistor® Size 70 square body high-speed semiconductor fuse designed to provide ultra-fast protection for high-power semiconductor devices. This aR class fuse is engineered for protecting diodes, thyristors, GTOs and IGBTs operating on 1100 V AC (IEC) and 1200 V AC (UL) systems. It features a 350 A current rating, integrated striker indicator and DIN 110 blade terminals.
Manufactured by Mersen, Catalogue Number PC70UD11C350D1A, the D300544 forms part of the renowned Protistor® semiconductor protection range. Constructed with pure silver fuse elements embedded in solidified silica sand, silver-plated contact surfaces and non-magnetic hardware, it provides exceptionally low let-through energy and reliable protection for demanding power conversion equipment.
With a 150 kA AC breaking capacity, ceramic square body construction and DIN 110 blade terminals, the D300544 is ideally suited for industrial drives, power converters, renewable energy systems, UPS installations and other high-power electronic equipment requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 350 A rated current.
- 1100 V AC IEC / 1200 V AC UL voltage rating.
- Integrated striker indicator for rapid fault indication.
- DIN 110 blade terminals for secure bolted installation.
- 150 kA breaking capacity.
Key Features
- Mersen Protistor® Size 70 semiconductor fuse.
- Catalogue number: PC70UD11C350D1A.
- 350 A current rating.
- 1100 V AC IEC / 1200 V AC UL.
- aR operating class.
- Integrated striker indication.
- DIN 110 blade terminals.
- Square body bolted mounting.
Engineered for High-Power Semiconductor Protection
Protistor® Size 70 semiconductor fuses are designed to minimise fault energy during overload and short-circuit conditions. Their low I²t characteristics help protect valuable semiconductor devices while reducing equipment downtime and maintenance costs.
The Mersen D300544 combines high interrupting capacity, low power losses and robust ceramic construction to deliver dependable protection for industrial drives, converters, UPS systems and renewable energy installations operating at voltages up to 1200 V AC UL.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- UPS systems.
- Renewable energy converters.
- Motor control equipment.
- High-power semiconductor protection.
