Why Choose the Mersen R300717 High-Speed Semiconductor Fuse?
The Mersen R300717, catalogue reference A130UD71LLI280, is a Protistor® Size 71 high-speed semiconductor fuse developed to provide exceptional short-circuit protection for modern power conversion equipment. It is rated at 280A and is suitable for systems operating up to 1250VAC (IEC) and 1300VAC (UL).
Its ultra-fast aR operating characteristic is specifically engineered to protect sensitive semiconductor devices including diodes, thyristors and IGBT modules. Precision fuse elements embedded in solidified silica sand help minimise let-through energy (I²t) while delivering a high interrupting capacity during severe fault conditions.
The fuse features long slotted blade terminals, silver-plated contact surfaces, a robust square ceramic body and an integrated striker indicator capable of operating an optional microswitch for remote status indication, making it ideal for demanding industrial power electronic installations.
Key Advantages
- Ultra-fast aR semiconductor protection.
- 280A rated current for demanding industrial applications.
- Rated up to 1250VAC IEC and 1300VAC UL.
- Integrated striker for mechanical fuse indication.
- Long slotted blade terminals for secure bolted installation.
- Low I²t performance reduces semiconductor damage.
- Silver-plated contacts ensure excellent conductivity.
- Robust ceramic body for reliable industrial performance.
Key Features
- Mersen Protistor® Size 71 fuse-link.
- Manufacturer part number: R300717.
- Catalogue number: A130UD71LLI280.
- Square-body high-speed semiconductor fuse.
- aR ultra-fast operating characteristic.
- 280A rated current.
- 1250VAC IEC rated voltage.
- 1300VAC UL rated voltage.
- AC operation.
- Integrated striker indicator.
- Long slotted blade terminals.
- Silver-plated contact surfaces.
- Non-magnetic mounting hardware.
- Designed for semiconductor protection.
Designed for Critical Power Electronics
Protistor® semiconductor fuses are engineered to provide maximum protection for expensive semiconductor devices by rapidly interrupting fault currents before excessive thermal energy can damage power electronic components. Their advanced construction provides low arc energy and excellent current-limiting performance.
The Mersen R300717 is ideal for protecting variable speed drives, inverters, rectifiers, UPS systems, renewable energy converters and other industrial power conversion equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- Rectifiers.
- Inverters.
- UPS systems.
- Renewable energy systems.
- Battery energy storage converters.
- Industrial welding equipment.
- IGBT protection.
- Thyristor and diode protection.
