Littelfuse L25S040 Semiconductor Fuse 40A 250VAC VDC Very Fast-Acting 200000 AIR

The L25S040 from Littelfuse is designed to provide exceptional current limiting and protection for semiconductor applications. It features a remarkably low I²t and peak let-through current, ensuring compliance with a wide range of semiconductor requirements, while its very fast-acting opening mechanism allows for immediate interruption of current flow in critical situations. With a high interrupting rating of 200,000 A.I.R. at 250 VAC and 250 VDC, this fuse guarantees reliable disruption of overcurrents, meeting both current and future system demands. UL recognized, it serves as a robust option for supplementary protection in UL listed equipment, providing users with peace of mind regarding safety and performance.

• Extremely current limiting with low I²t and peak let-through currents meeting semiconductor requirements
• Very fast-acting opening mechanism for immediate current interruption
• High interrupting rating of 200,000 A at 250 VAC and 20,000 A at 250 VDC for reliable overcurrent disruption
• UL Recognized for safety in listed equipment
• Constructed with melamine body and silver-plated copper alloy caps for durability and conductivity
• Operates reliably within a wide temperature range of -55 °C to +125 °C
• RoHS compliant for environmental safety
• Direct bus-bar or stud mount design compatible with North American bolted fuse holders
• Class aR performance optimized for semiconductor device protection

• Voltage: 250 V AC, 250 V DC
• Amperage: 40 A
• Interrupting Rating: 20,000 A @ 250 V DC, 200,000 A @ 250 V AC
• Opening Time: Very Fast-Acting (FF), 10 ms
• Material: Melamine, Copper Alloy (Silver Plated)
• Operating Temperature: -55 °C to +125 °C
• Storage Temperature: Up to 35 °C, <65% RH
• Compliance: RoHS
• Country of Origin: Mexico

Datasheets

RoHS Declaration

Certification

ICP Test Report