Littelfuse LDC1800 1800A Class L Fast-Acting Fuse – Bolt-In – 600VAC/DC

The Littelfuse LDC1800 POWR-PRO® Class L fuse is a high-capacity fast-acting fuse designed for dual AC and DC protection in demanding industrial and transportation power systems. As part of the LDC series, it is the first UL Listed Class L fuse rated for both 600V AC and DC, helping prevent misapplication of AC-only fuses in DC circuits. It is widely used in heavy industrial distribution, crane rail systems, and mass transit applications requiring high interrupting performance.

Voltage and Rating

• Current Rating: 1800 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
• Fuse Class: Class L
• Mounting Type: Bolt-In
• Series: LDC POWR-PRO®
• Family Style: Powr-Pro Fuse
• Application: AC/DC industrial power systems, transit, and heavy-duty infrastructure

Technical Specifications

• Opening Characteristic: Fast-Acting
• Current Limiting: Yes
• Interrupt Amperage: 200,000 Amps
• DC Capability: Tested for extended time constant performance
• Construction: Heavy-duty industrial fuse design for high fault environments
• Safety Feature: Eliminates risk of AC-only fuse use in DC circuits

Product Data

• Manufacturer: Littelfuse
• Model Number: LDC1800
• Series: LDC POWR-PRO®

Features

• First UL Listed 600V AC/DC Class L fuse series
• Extremely high interrupting capacity for severe fault conditions
• Suitable for crane rail, mass transit, and heavy industrial systems
• Strong current-limiting protection to reduce equipment damage
• Reliable operation under both AC and DC fault scenarios