Littelfuse LDC900 900A Class L Fast-Acting Fuse – Bolt-In – 600VAC/DC

The Littelfuse LDC900 POWR-PRO® Class L fuse is a dual-rated fast-acting current-limiting fuse designed for high-capacity AC and DC protection in industrial, transportation, and heavy-duty power distribution systems. As part of the LDC series, it is UL Listed for both 600V AC and 600V DC, helping eliminate the risk of installing AC-only fuses in DC circuits and reducing inventory complexity for mixed power systems.

Voltage and Rating

• Current Rating: 900 Amps
• Voltage Rating: 600 Volts AC
• DC Voltage Rating: 600 Volts DC
• Interrupting Rating: 200 kA at 600 VAC
• Interrupting Rating: 50 kA at 600 VDC

Key Specifications

• Fuse Type: Fast-Acting (with moderate time-delay capability ~4 seconds at 500% load)
• Fuse Class: Class L
• Mounting Type: Bolt-In
• Series: LDC POWR-PRO®
• Application: AC/DC industrial and infrastructure power systems

Technical Specifications

• Opening Characteristic: Fast-Acting with moderate time delay
• Current Limiting: Yes
• Interrupt Amperage: 200,000 Amps
• DC Capability: Suitable for extended time constant applications
• Coordination: Works with other Littelfuse protection devices up to 600A systems
• Construction: Heavy-duty industrial fuse design for high fault environments

Product Data

• Manufacturer: Littelfuse
• Model Number: LDC900
• Series: LDC POWR-PRO®

Features

• First UL Listed 600V AC/DC Class L fuse family
• Reduces inventory by eliminating separate AC/DC fuse types
• High interrupting capacity for severe fault conditions
• Extremely current-limiting for equipment protection
• Suitable for crane rail, transit, and industrial distribution systems
• Moderate time-delay helps withstand harmless overloads and line surges