Littelfuse JLLS400 Class T Fuse 400A 600VAC 300VDC Fast-Acting Knife-Blade Bolt-In

The JLLS400 from Littelfuse is a high-performance fuse designed to deliver reliable protection for electric services and meters while minimizing space requirements. With an impressive interrupting rating of up to 200,000 amperes, this fast-acting Class T fuse efficiently protects sensitive equipment like variable speed drives and rectifiers from damaging overloads and short circuits. Its current-limiting design not only prevents damage from heating and magnetic effects associated with short circuit currents but also allows for the utilization of less costly, readily available components. Typical three-pole configurations occupy less than 50% of the space needed for Class R fuse blocks, making it an ideal choice for compact installations without sacrificing safety or performance.

• Fast-acting overload protection for surge-sensitive equipment
• Current-limiting design minimizes short circuit damage
• High interrupting rating up to 200,000 amperes
• Compact three-pole configurations occupy less than 50% space of Class R fuse blocks
• Suitable for 600 V AC and 300 V DC applications
• Melamine body with copper or bronze caps for durability and conductivity
• Enables use of cost-effective, readily available components due to current limiting
• Provides compact protection for meter stacks and electric services

• Voltage: 600 V AC, 300 V DC
• Ampere Rating: 400 A
• Interrupting Rating: 20,000 A @ 300 V DC, 200 kA rms symmetrical
• Fuse Type: Fast-Acting
• Material: Melamine body, copper or bronze caps
• Country of Origin: Mexico

Certification

Datasheets

ICP Test Report