Why Choose the Mersen J220969 Protistor® High Speed Semiconductor Fuse?
The Mersen J220969 is a Protistor® BS88-4 high speed semiconductor fuse designed to provide comprehensive protection for sensitive power semiconductor devices. Featuring a gR operating class, it provides both overload and short-circuit protection for power electronics including IGBTs, thyristors, diodes and rectifiers, making it ideal for demanding industrial applications.
Manufactured in a 17 × 49 mm British Standard fuse-link, the J220969 combines an 80 A current rating with a 690 V AC IEC voltage rating. It offers extremely high breaking capacity, excellent current limitation and reliable semiconductor protection whilst enabling selective coordination within distribution circuits. The fuse complies with IEC 60269-1, IEC 60269-4 and BS88-4 standards.
Designed for industrial drives, UPS systems, power converters and other semiconductor-based equipment, the Mersen J220969 is a dependable solution where fast fault clearance and maximum equipment protection are essential.
Key Advantages
- High speed Protistor® semiconductor protection fuse.
- 80 A current rating.
- 690 V AC IEC rated voltage.
- gR operating class providing overload and short-circuit protection.
- Extremely high breaking capacity of 200 kA.
- BS88-4 construction for easy installation into compatible fuse holders.
Key Features
- Mersen Protistor® BS88-4 series.
- Manufacturer part number J220969.
- Catalogue number BS17GB69V80.
- 80 A rated current.
- 690 V AC IEC / 700 V AC UL / 600 V DC UL.
- gR operating class.
- 17 × 49 mm British Standard fuse-link.
- Ceramic body with extremely high interrupting capacity.
Reliable Protection for Industrial Power Electronics
Modern semiconductor devices require protection capable of responding within milliseconds during fault conditions. The Mersen Protistor® range is engineered to minimise let-through energy, helping prevent catastrophic semiconductor failure whilst improving equipment reliability and reducing maintenance costs.
The J220969 uses a gR operating class, enabling both overload and short-circuit protection for semiconductor devices while providing excellent coordination with other protective devices installed within industrial distribution systems.
Typical Applications
- Variable frequency drives.
- Industrial power converters.
- UPS systems.
- Industrial rectifiers.
- Renewable energy power conversion equipment.
- Semiconductor motor control systems.
