Why Choose the Mersen A300840 High-Speed Semiconductor Fuse?
The Mersen A300840 (Catalogue No. PC71UD13C315PA) is a Protistor® Size 71 square-body high-speed semiconductor fuse designed to provide exceptional short-circuit protection for modern power electronic equipment. Rated at 315 A with voltage ratings of 1250 V AC (IEC) and 1300 V AC (UL), it delivers reliable protection for diodes, thyristors, IGBT modules and other sensitive semiconductor devices.
Engineered with Mersen's advanced fuse technology, the A300840 features precision die-cut fuse elements embedded in solidified sand to provide extremely low let-through energy (I²t), rapid fault interruption and excellent current limitation. Silver-plated contact surfaces and non-magnetic hardware further enhance long-term reliability in demanding industrial environments.
The integrated striker mechanism enables remote indication or operation of an optional microswitch, making this fuse ideal for critical power conversion systems where rapid fault signalling is essential.
Key Advantages
- Ultra-fast aR semiconductor protection.
- 315 A current rating.
- 1250 V AC IEC / 1300 V AC UL voltage ratings.
- Integrated striker for remote indication or microswitch operation.
- Very low let-through energy (I²t) protects expensive semiconductor devices.
- Silver-plated contacts for excellent conductivity and corrosion resistance.
- High interrupting capacity for demanding industrial applications.
Key Features
- Mersen Protistor® Size 71 semiconductor fuse.
- Catalogue number PC71UD13C315PA.
- Square-body construction.
- aR ultra-fast operating characteristic.
- 315 A rated current.
- 1250 V AC IEC / 1300 V AC UL.
- Plain blade terminals.
- Integrated striker indicator.
- Solidified sand arc-quenching technology.
- Designed for semiconductor short-circuit protection.
Designed for Modern Power Conversion Systems
The Mersen A300840 has been specifically developed for demanding power electronics where conventional fuses cannot provide sufficiently fast protection. Its extremely low I²t characteristic significantly reduces thermal stress on semiconductor components, helping to extend equipment life while minimising downtime following fault conditions.
The integrated striker provides convenient remote indication or can operate an optional field-mounted microswitch, making maintenance and system monitoring more efficient in industrial installations.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters.
- Power converters.
- Rectifier systems.
- UPS equipment.
- Motor drives.
- Renewable energy converters.
- Industrial automation systems.
