Why Choose the Mersen C300037 PC31UD69V200EF High-Speed Fuse?
The Mersen C300037 PC31UD69V200EF is an ultra-fast square body semiconductor fuse engineered to protect sensitive power electronic devices against damaging short-circuit currents. Part of the established Mersen Protistor® Size 31 aR series, it is designed for reliable protection of diodes, thyristors, IGBTs and other semiconductor components used in industrial power conversion equipment.
The fuse incorporates precision die-cut elements embedded in solidified silica sand, helping control internal arcing while delivering low let-through energy and effective current limitation. Its ceramic body, silver-plated copper contacts and non-magnetic hardware provide dependable electrical and mechanical performance in demanding industrial environments.
With a rated current of 200 A, an IEC voltage rating of 690 V AC and a UL voltage rating of 700 V AC, the C300037 is suitable for motor drives, inverters, converters, UPS systems and similar power electronic equipment. Open-slot blade terminals support secure bolted installation, while the integrated striker provides convenient fuse-status indication.
Key Advantages
- Ultra-fast aR semiconductor fuse for short-circuit protection.
- 200 A rated current for industrial power conversion equipment.
- 690 V AC IEC and 700 V AC UL ratings.
- High 200 kA breaking capacity for severe fault conditions.
- Low I²t performance helps minimise stress on semiconductor devices.
- Integrated striker provides clear fuse-operation indication.
Key Features
- Mersen Protistor® Size 31 aR series.
- 200 A ampere rating.
- 690 V AC IEC / 700 V AC UL.
- Square body ceramic fuse construction.
- Silver-plated copper open-slot blade terminals.
- Bolted mounting configuration.
- Integrated striker indication system.
- Current-limiting design with low melting and clearing I²t values.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses operate considerably faster than general-purpose industrial fuses, enabling them to limit fault energy before vulnerable electronic components suffer serious thermal or electrical damage. Their rapid response helps protect valuable equipment while reducing the risk of extended production downtime.
The Mersen Protistor® range is developed for power conversion systems requiring low I²t performance, high interrupting capacity and reliable cycling capability. These characteristics make the C300037 suitable for professional installations in which dependable semiconductor protection is critical.
Typical Applications
- Variable frequency drives and motor drives.
- Industrial inverters and power converters.
- Uninterruptible power supply systems.
- Rectifiers and semiconductor power assemblies.
- Renewable energy conversion equipment.
- Industrial automation and process-control systems.
