Why Choose the Mersen R300671 High-Speed Semiconductor Fuse?
The Mersen R300671, catalogue reference A130UD72LI315, is a Protistor® Size 72 high-speed semiconductor fuse designed to provide exceptional short-circuit protection for modern power electronic equipment. Rated at 315A, it is suitable for systems operating up to 1250VAC (IEC) and 1300VAC (UL).
Featuring an ultra-fast aR operating characteristic, the R300671 is engineered to protect sensitive semiconductor devices including diodes, thyristors and IGBT modules. Its advanced construction delivers low let-through energy (I²t), helping to minimise damage during high fault-current conditions.
The fuse incorporates slotted blade terminals with long blades, silver-plated contacts, a ceramic square body and an integrated striker indicator that can operate an optional microswitch for remote indication. These features make it ideal for demanding industrial power conversion applications.
Key Advantages
- Ultra-fast aR semiconductor protection.
- 315A current rating for industrial power electronics.
- Suitable for 1250VAC IEC and 1300VAC UL systems.
- Integrated striker provides mechanical blown-fuse indication.
- Long slotted blade terminals for secure installation.
- Low I²t performance reduces semiconductor damage.
- Silver-plated contacts provide excellent conductivity.
- Robust ceramic body withstands demanding industrial environments.
Key Features
- Mersen Protistor® Size 72 fuse-link.
- Manufacturer part number: R300671.
- Catalogue number: A130UD72LI315.
- Square-body high-speed semiconductor fuse.
- aR ultra-fast operating characteristic.
- 315A 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 specifically developed for protecting expensive power electronic components against destructive short-circuit currents. Their precision fuse elements are embedded within compacted silica sand to deliver rapid interruption, low arc energy and high breaking capacity.
The Mersen R300671 is well suited to applications where dependable semiconductor protection is essential, including industrial drives, rectifiers, renewable energy converters, UPS systems and high-power automation equipment.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- Rectifiers.
- Inverters.
- UPS systems.
- Renewable energy converters.
- Battery energy storage systems.
- Industrial welding equipment.
- IGBT protection.
- Thyristor and diode protection.
