Littelfuse L70S040 Fast-Acting Semiconductor Fuse 40A 700VAC 650VDC Very Fast-Acting

The L70S040 from Littelfuse is engineered to ensure exceptional protection in electrical systems, particularly with its extremely current-limiting capabilities that keep I²t and peak let-through currents low, addressing the needs of various semiconductor applications. This fast-acting fuse boasts impressive interrupting ratings of 200 kAIC for AC and 20 kAIC for DC, making it a reliable choice for managing overcurrents in demanding environments, whether current needs are immediate or evolving. Recognized by UL for its performance, this high-speed fuse is designed to function as supplementary protection, thus enhancing the safety and reliability of UL-listed equipment. With an amperage rating of 40 A and compatibility with operational voltages up to 650 VDC and 700 VAC, the L70S040 provides versatile and robust solutions in circuit protection.

• Extremely current limiting for semiconductor protection
• Very fast-acting operation for quick fault interruption
• High interrupting rating of 200 kAIC AC and 20 kAIC DC
• UL recognized for use in supplementary protection of UL-listed equipment
• Compatible with bolted tag mounting for secure installation
• Wide operating temperature range from -55°C to +125°C
• Low I²t and peak let-through currents minimize damage to sensitive equipment
• RoHS and CSA compliant meeting environmental and safety standards
• Operates effectively up to 700 VAC and 650 VDC

• Voltage: 700 Vac, 650 Vdc
• Amperage: 40 A
• Interrupting Rating: 20,000 A at 650 Vdc, 200 kAIC AC
• Opening Type: Very Fast-Acting (FF)
• Material: Body: Melamine, Terminals: Copper (silver plated)
• Mounting Type: Bolted Tags (35 - 800 A)
• Operating Temperature: -55°C to +125°C
• Compliance: UL Recognized, RoHS Compliant, CSA Recognized
• Country of Origin: Mexico

Environmental Info

RoHS Declaration

Datasheets

Certification

ICP Test Report