Littelfuse JLLS125 Class T Fuse 125A 600VAC 300VDC Fast-Acting Knife-Blade/Bolt-In

Littelfuse's JLLS125 from the JLLS Series offers an advanced solution for the protection of individual electric services and meters, thanks to its expertly engineered fast-acting design. With a robust ampere rating of 125 and a reliable interrupting rating of up to 20,000A at 300VDC, it effectively halts damaging short circuit currents faster than traditional mechanical devices, safeguarding critical equipment from overheating and magnetic effects. This current-limiting approach not only enhances safety but also allows for the use of less costly equipment, as the compact Class T fuse blocks require significantly less panel space compared to their Class R counterparts. Ideal for surge-sensitive components like variable speed drives and rectifiers, these fuses prevent costly damage by offering quick overload protection, thus enhancing the operational reliability of your systems. With series ratings available up to 200,000 amperes, the JLLS125 fuse serves as a vital component for both input and output applications, ensuring the integrity of the electrical infrastructure while optimizing space and performance.

• Fast-acting overload protection for surge-sensitive equipment
• Extremely current limiting to prevent short circuit damage
• High interrupting rating up to 200,000 amperes
• Compact size requiring less than one-third panel space of Class R fuses
• Robust 125 A rating suitable for various industrial applications
• Protects individual electric services and meters
• Melamine body with copper caps for reliable performance
• UL Listed, CSA Certified, and RoHS Compliant for safety and environmental standards
• Ideal for use with variable speed drives and rectifiers

• Voltage: 600 VAC, 300 VDC
• Ampere Rating: 125 A
• Interrupting Rating: 20,000 A @ 300 VDC, 200,000 A @ 600 VAC
• Fuse Type: Fast-Acting, Current Limiting
• Material: Melamine body, copper caps
• Size: Less than one-third size of Class R fuses
• Compliance: UL Listed, CSA Certified, RoHS Compliant
• Country of Origin: Mexico

Certification

Datasheets

ICP Test Report