Why Choose the Mersen M330038 Protistor® High-Speed Fuse?
The Mersen M330038 (DN000UB69V125) is a premium square body high-speed semiconductor protection fuse from the trusted Mersen Protistor® series. Designed specifically to protect sensitive power electronic equipment, this ultra-fast aR fuse safeguards IGBTs, thyristors, diodes and other semiconductor devices against damaging short-circuit currents while delivering outstanding current-limiting performance.
Manufactured using die-cut silver fuse elements embedded in solidified silica sand, the M330038 provides exceptionally low let-through energy (I²t), high interrupting capacity and silver-plated contacts for reliable long-term operation. Its compact NH000 square body with DIN 80 blade terminals enables straightforward installation in industrial power conversion equipment.
With a 125 A rated current and a 690 V AC IEC / UL operating voltage, the M330038 is ideally suited for variable frequency drives, UPS systems, converters, rectifiers and other industrial applications requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 125 A rated current for industrial power electronic systems.
- 690 V AC IEC / UL operating voltage.
- Designed to protect IGBTs, thyristors and semiconductor devices.
- Low I²t performance reduces equipment damage during fault conditions.
- DIN 80 blade terminals provide secure, low-resistance connections.
Key Features
- Mersen Protistor® high-speed fuse series.
- Catalogue number: DN000UB69V125.
- 125 A rated current.
- 690 V AC IEC / UL rated voltage.
- aR operating class for semiconductor protection.
- NH000 square body construction.
- DIN 80 silver-plated blade contacts.
- Optional low-voltage trip indicator compatibility.
Reliable Protection for Industrial Power Electronics
The Mersen M330038 is engineered to interrupt high fault currents before they can damage expensive semiconductor components. Its ultra-fast response and low energy let-through characteristics improve equipment reliability, reduce maintenance costs and minimise costly production downtime.
The Protistor® range is trusted by OEMs and electrical engineers worldwide for protecting industrial drives, converters, UPS systems and renewable energy equipment where rapid semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and semiconductor protection.
