Why Choose the Mersen P076649 High-Speed Semiconductor Fuse?
The Mersen P076649 is a compact Protistor® high-speed semiconductor fuse-link designed to protect sensitive power electronic components against damaging short-circuit currents. Manufactured in a British Standard format, it delivers rapid fault interruption and effective current limitation for industrial control, conversion and automation equipment.
Featuring an aR partial-range operating characteristic, the P076649 is specifically engineered for the protection of power semiconductors. Its fast response helps restrict peak fault current and let-through energy, reducing electrical, thermal and mechanical stress on components such as diodes, thyristors, rectifiers and IGBTs.
With a rated current of 12 A, an IEC and UL AC voltage rating of 250 V and a UL DC voltage rating of 300 V, the Mersen P076649 is suitable for power supplies, compact drives, converters, inverters and industrial control systems. Its 17 × 27 mm ceramic body and copper L-bracket terminals provide a durable, space-efficient solution for bolted installation.
Key Advantages
- High-speed semiconductor fuse for industrial power electronics.
- 12 A rated current for compact control and conversion circuits.
- 250 V AC IEC and UL rating for dependable circuit protection.
- 300 V DC UL rating for compatible direct-current applications.
- aR operating class provides rapid semiconductor short-circuit protection.
- Low let-through energy helps minimise damage to sensitive components.
Key Features
- Mersen Protistor® BS88-4 URGS/URZ fuse range.
- 12 A nominal current rating.
- 250 V AC IEC and UL rated voltage.
- 300 V DC UL rated voltage.
- aR partial-range semiconductor protection characteristic.
- Compact 17 × 27 mm ceramic fuse body.
- Copper L-bracket connection terminals.
- Bolted mounting for secure electrical connections.
Rapid Protection for Sensitive Power Electronics
The Mersen P076649 is engineered to interrupt dangerous fault currents before excessive energy can reach sensitive semiconductor devices. Its low melting and clearing I²t values help limit the energy released during a short circuit, reducing the likelihood of damage to power modules and associated equipment.
As an aR-class fuse, the P076649 provides partial-range protection specifically against semiconductor short-circuit currents. Appropriate supplementary overload protection should be incorporated where complete protection against both overload and short-circuit conditions is required.
Typical Applications
- Protection of diodes, thyristors and IGBT devices.
- Industrial power supplies and control circuits.
- Compact variable frequency drives.
- Rectifiers and power converters.
- Industrial inverters and battery chargers.
- Automation machinery and semiconductor-controlled equipment.
