Why Choose the Mersen D301073 Protistor® High-Speed Fuse?
The Mersen D301073 (catalogue number A055UD32LI1400) is a Protistor® Size 32 square body high-speed semiconductor fuse engineered to provide ultra-fast protection for modern power electronic equipment. Featuring an aR ultra-fast operating characteristic, it is specifically designed to protect sensitive semiconductor devices such as IGBTs, thyristors and diodes from damaging short-circuit currents.
Rated at 1400A, with a 500VAC IEC and 550VAC UL voltage rating, the D301073 delivers exceptional current-limiting performance for demanding industrial applications. Its square body construction with long slotted blade terminals and an integrated striker makes it suitable for a wide range of OEM and industrial power conversion systems.
Manufactured by Mersen, a global leader in electrical protection, the D301073 forms part of the renowned Protistor® semiconductor fuse range, trusted worldwide for protecting critical power electronics whilst reducing downtime and minimising equipment damage.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- Protects IGBTs, thyristors, diodes and other semiconductor devices.
- Excellent current-limiting characteristics reduce fault energy.
- 1400A continuous current rating for high-power applications.
- Integrated striker for remote indication and microswitch compatibility.
- Manufactured by Mersen, a trusted global protection specialist.
Key Features
- Mersen Protistor® Size 32 semiconductor fuse.
- Manufacturer reference D301073.
- Catalogue number A055UD32LI1400.
- aR ultra-fast operating characteristic.
- Square body construction.
- Long slotted blade terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Low I²t for superior semiconductor protection.
- RoHS compliant.
Designed for Critical Power Electronics
Protistor® semiconductor fuses are engineered to interrupt fault currents before sensitive power electronic components suffer irreversible damage. Their low let-through energy and rapid fault-clearing capability help extend equipment life whilst reducing maintenance costs and production downtime.
The D301073 is ideal for high-power industrial installations where dependable semiconductor protection is essential, including variable speed drives, converters, renewable energy systems and industrial rectifiers.
Typical Applications
- Variable frequency drives.
- Industrial motor drives.
- Power converters.
- Rectifiers.
- Renewable energy inverters.
- UPS systems.
- Energy storage systems.
- Industrial automation equipment.
