Why Choose the Mersen J300020 Protistor® High-Speed Fuse?
The Mersen J300020 is a premium Protistor® Size 31 square body high-speed semiconductor fuse engineered to provide advanced protection for modern power electronic equipment. Designed for rapid fault interruption, it safeguards IGBTs, thyristors, diodes and rectifiers against damaging short-circuit currents, helping maximise equipment reliability while reducing costly downtime.
As part of the renowned Mersen Protistor® Size 31 aR series, the J300020 combines high breaking capacity with low let-through energy to deliver outstanding semiconductor protection. Its ceramic square body, silver-plated contacts and integrated striker indicator make it suitable for demanding industrial power conversion applications where dependable protection is essential.
With a 250 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and DIN 110 blade terminals, the J300020 is widely used in variable frequency drives, UPS systems, converters, soft starters and renewable energy equipment.
Key Advantages
- High-speed aR semiconductor protection fuse.
- 250 A rated current for industrial power electronics.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors, diodes and other semiconductor devices.
- Low I²t reduces stress on sensitive electronic components.
- Integrated striker indicator for simplified maintenance.
Key Features
- Mersen Protistor® Size 31 square body fuse.
- aR ultra-fast semiconductor protection characteristic.
- 250 A rated current.
- 690 V AC IEC / 700 V AC UL rated.
- DIN 110 blade terminal mounting.
- Integrated striker indication.
- Silver-plated contact surfaces.
- Ceramic square body construction.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically designed to interrupt high fault currents before they can damage expensive power electronic devices. Their ultra-fast operation and low let-through energy help improve equipment availability while reducing repair costs and production downtime.
The Mersen Protistor® range is trusted worldwide by OEMs, panel builders and electrical engineers for protecting industrial drives, converters and other critical power conversion equipment operating in demanding environments.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and inverters.
- UPS systems.
- Soft starters.
- Renewable energy power conversion equipment.
