Why Choose the Mersen E300039 Protistor® High Speed Fuse?
The Mersen E300039, catalogue number PC31UD69V315EF, is a high performance square body semiconductor protection fuse engineered to provide ultra-fast protection for power electronic devices in demanding industrial environments. Part of the trusted Mersen Protistor® Size 31 series, this fuse is specifically designed to safeguard sensitive semiconductors including IGBTs, thyristors and diodes against short circuits and fault currents.
Designed for modern power conversion equipment, the E300039 delivers exceptional current limitation and low let-through energy, helping to reduce equipment damage and minimise downtime. Silver-plated contact surfaces, solidified sand construction and precision manufactured fuse elements provide dependable performance in high-power industrial applications.
With a 315 A current rating and 690 V AC IEC / 700 V AC UL voltage rating, this Protistor® fuse is ideal for variable speed drives, UPS systems, DC drives, soft starters, inverters and renewable energy equipment where reliable semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for power electronics.
- 315 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL rated voltage.
- Protects sensitive IGBT, thyristor and diode devices.
- Low let-through energy helps minimise equipment damage.
- Robust square body construction for reliable long-term performance.
Key Features
- Mersen Protistor® Size 31 series.
- 315 A rated current.
- 690 V AC IEC / 700 V AC UL voltage rating.
- aR ultra-fast operating characteristic.
- Square body fuse with open slot blade terminals.
- Integrated striker indicator for remote status indication.
- Silver-plated contacts for improved conductivity.
- Designed for semiconductor and power conversion protection.
Reliable Protection for Power Electronics
High speed semiconductor fuses are specifically designed to interrupt fault currents before they can damage expensive electronic components. The Mersen Protistor® range provides extremely fast operation with low I²t characteristics, making it ideal for protecting modern power semiconductor devices used in industrial automation and energy conversion systems.
The E300039 combines proven fuse technology with high breaking capacity and dependable performance, helping maximise equipment availability while reducing maintenance costs in critical industrial installations.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS and backup power systems.
- Renewable energy inverters.
- Soft starters and industrial automation equipment.
