Mersen A070UD73TTI1600 Protistor High-Speed Fuse, 1600A 690VAC, Size 73 aR, Flush End UNC Threads with Striker - Pack of 6

The Mersen Protistor® A070UD73TTI1600 (Item Number: Q300877) is an ultra-fast acting square body fuse designed for the ultimate protection of modern power conversion equipment. Specifically engineered for semiconductor devices such as diodes, thyristors, and IGBTs, this Size 73 fuse-link provides industry-leading protection with a high interrupting rating and low I²t let-through. Its flush-end design with UNC threads ensures a secure and high-conductivity interface for heavy-duty industrial applications.

Key Features

• High-Speed Protection: Classified under utilization category aR, providing ultra-fast clearing of faults to protect sensitive semiconductors.
• Premium Construction: Assembled with pure silver die-cut elements embedded in solidified sand for superior arcing control and high breaking capacity.
• Dual Voltage Compliance: Rated at 690VAC per IEC standards and 700VAC per UL standards for global equipment compatibility.
• Integrated Indication: Includes a low-voltage striker (trip-indicator) for visual confirmation of fuse operation and compatibility with field-mountable microswitches.
• Optimized Materials: Features silver-plated brass contact surfaces and non-magnetic hardware to minimize resistance and heat generation.

Technical Specifications

• Brand: Mersen / Ferraz Shawmut
• Catalogue Number: A070UD73TTI1600
• Item Number: Q300877
• Current Rating: 1600A
• Voltage Rating: 690VAC (IEC) / 700VAC (UL)
• Breaking Capacity: 200kA
• Fuse Size: 73
• Utilization Category: aR
• Clearing I²t at Rated Voltage: 5740 kA²s
• Melting I²t: 1430 kA²s
• Terminal Type: Flush End (UNC threads)
• Power Dissipation (at In): 203 W
• Body Material: High-Strength Ceramic
• Physical Dimensions: 73mm (W) x 78.5mm (H) x 74mm (L)
• Compliance: RoHS Compliant, IEC Rated, UL Recognized