Littelfuse L25S045 Semiconductor Fuse 45A 250VDC 20000A Interrupting Rating Very Fast-Acting

The L25S045 from Littelfuse stands out as a highly reliable semiconductor fuse, offering an impressive 200,000 A.I.R. for the interruption of overcurrents, effectively addressing both current demands and future system requirements. Designed for fast-acting performance, this fuse features extremely current-limiting capabilities with low I²t and peak let-through currents, making it ideal for sensitive semiconductor applications. Recognized by Underwriters Laboratories, this model ensures supplementary protection in UL-listed equipment, affirming its safety and efficacy in high-stakes environments. With a versatile ampere rating of 45 and a maximum operating voltage of 250 VDC, it delivers robust protection for diverse electrical systems.

• High interrupting rating of 200,000 A for robust overcurrent protection
• Extremely current-limiting design with low I²t and peak let-through currents
• Very fast-acting with 10 ms time constant for rapid circuit interruption
• UL and CSA recognized for safety assurance in industrial applications
• Melamine body with silver-plated copper alloy caps for reliable insulation and conductivity
• Wide operating temperature range from -55 °C to +125 °C for stable performance
• Direct bus-bar or stud mount design for compatibility with North American bolted fuse holders
• Designed for protection of power semiconductor devices like SCRs, diodes, triacs, and transistors
• Suitable for power converters, UPS systems, variable speed drives, and soft starters
• RoHS compliant construction supporting environmental and regulatory standards

• Amperage: 45 A
• Voltage DC: 250 V
• Voltage AC: 250 V
• Interrupting Rating DC: 20,000 A @ 250 VDC
• Interrupting Rating AC: 200 kA
• Opening Speed: Very Fast-Acting (FF)
• Time Constant: 10 ms
• Material: Melamine body, Copper Alloy (Silver Plated) caps
• Operating Temperature: -55 °C to +125 °C
• Storage Temperature: Up to 35 °C, <65% RH
• Compliance: UL Recognized, CSA Recognized, RoHS Compliant
• Country of Origin: Mexico

Datasheets

RoHS Declaration

Certification

ICP Test Report