Why Choose the Mersen E300269 Protistor® High Speed Fuse?
The Mersen E300269, catalogue number PC233UD69V14CTF, is a premium square body high speed semiconductor fuse designed to provide ultra-fast protection for modern power electronic equipment. Part of the trusted Mersen Protistor® Size 2x33 series, this fuse is specifically engineered to protect IGBTs, thyristors, diodes and other semiconductor devices against damaging short circuits and fault currents.
Designed for demanding industrial environments, the E300269 delivers exceptional current limiting performance with low let-through energy, helping to minimise equipment damage and maximise system uptime. Precision die-cut fuse elements embedded in solidified sand, silver-plated contact surfaces and non-magnetic hardware ensure dependable long-term protection for critical power conversion equipment.
With a 1400 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the Mersen E300269 is ideally suited for high-power drives, converters, UPS systems, renewable energy installations and industrial automation equipment requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1400 A current rating for high-power industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Designed to protect IGBTs, thyristors and diode modules.
- Low I²t characteristics help minimise equipment damage.
- Omega connection provides secure, high-current installation.
Key Features
- Mersen Protistor® Size 2x33 series.
- 1400 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Flush end terminals with metric threads.
- Omega connection mounting arrangement.
- Integrated striker indicator for remote status indication.
- Silver-plated contacts with non-magnetic hardware.
Reliable Protection for Industrial Power Electronics
High speed semiconductor fuses are specifically engineered to interrupt fault currents before sensitive semiconductor devices can be damaged. The Mersen Protistor® range delivers exceptionally fast fault clearing with low I²t values, making it ideal for protecting modern power conversion equipment and maintaining maximum system reliability.
The E300269 is widely used in industrial motor drives, renewable energy systems, converters and heavy-duty automation equipment where dependable semiconductor protection is essential for safe and continuous operation.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- Power converters and rectifiers.
- UPS and standby power systems.
- Renewable energy inverter systems.
- Industrial automation and OEM machinery.
