Why Choose the Mersen E301281 Protistor® High Speed Semiconductor Fuse?
The Mersen E301281 is a high performance Protistor® square body high speed semiconductor fuse engineered to provide full-range protection for sensitive power semiconductor devices in demanding industrial power conversion systems. Designed to minimise let-through energy during fault conditions, it helps protect expensive equipment while maximising system reliability and uptime.
Part of the renowned Mersen Protistor® Size 70 gR 690 VAC series, the E301281 is manufactured using pure silver fuse elements embedded in solidified sand to deliver excellent current limiting characteristics, low I²t values and a high interrupting capacity. Silver-plated contacts and non-magnetic hardware ensure dependable long-term performance in industrial environments.
Rated at 80 A and 690 V AC, this square body fuse features flush ends with metric threads and an integrated striker indicator, making it ideal for protecting rectifiers, inverters, variable speed drives, UPS systems and other power electronic equipment.
Key Advantages
- High speed Protistor® semiconductor fuse for critical power electronics.
- 80 A current rating for industrial power conversion equipment.
- 690 V AC IEC rating.
- Full-range gR protection against overloads and short circuits.
- Low I²t characteristics help minimise semiconductor damage.
- Silver-plated contacts for improved conductivity and reliability.
- Integrated striker indicator for remote status indication.
Key Features
- Mersen Protistor® Size 70 gR series.
- Manufacturer Part Number: E301281.
- Catalogue Number: PC70GB69V80TF.
- 80 A rated current.
- 690 V AC IEC rated voltage.
- Square body ceramic fuse construction.
- Flush ends with metric threaded terminals.
- Low voltage striker indicator.
- Current limiting design with pure silver fuse elements.
Reliable Protection for Modern Power Electronics
High speed semiconductor fuses are specifically designed to protect power electronic devices that require extremely fast fault interruption. The Mersen Protistor® range combines low energy let-through with high breaking capacity, helping prevent costly damage to SCRs, IGBTs, diodes and thyristors used in industrial power conversion equipment.
The E301281 is widely specified by equipment manufacturers and industrial engineers requiring dependable protection for converters, drives and other critical electrical systems where rapid fault clearance is essential.
Typical Applications
- Variable speed drives.
- Industrial inverters.
- Rectifiers.
- UPS systems.
- Power converters.
- Motor control equipment.
- Industrial automation systems.
