Littelfuse FLSR004 RK5 Fuse 4A 600VAC 300VDC Time Delay Industrial Cartridge

The FLSR Series from Littelfuse represents a significant advancement in circuit protection technology, providing service entrance switches and switchboard main and feeder switches designed for various applications including industrial control panels and distribution panelboards. With an impressive interrupting rating of 200,000 A.I.R., this device ensures reliable interruption of overcurrents, safeguarding fully-rated panelboards and loadcenters under extreme conditions. Its Slo-Blo/Time Lag opening mechanism allows for accurate operation, ensuring both overloads and short circuits are managed effectively, making it ideal for individual fused combination motor controllers and motor control center mains. Crafted with precision, the FLSR004 delivers not only safety but also efficiency with a robust design, supporting voltages up to 600 VAC and 300 VDC for versatile use across general purpose circuits.

• Dual-element design for advanced short circuit and overload protection
• Time delay Slo-Blo/Time Lag mechanism for precise overload and short circuit response
• High interrupting rating up to 200,000 A for reliable overcurrent interruption
• Current-limiting feature to reduce energy let-through during faults
• Rated for 600 VAC and 300 VDC for versatile industrial use
• Suitable for service entrance and switchboard main and feeder switches
• Protection of fully-rated panelboards and loadcenters
• Ideal for motor control centers and individual fused motor controllers
• UL Listed, CSA Certified, and meets Federal Specification WF-1814 for safety and compliance
• Robust design supporting industrial control panels and distribution panelboards

• Voltage DC: 300 V
• Voltage AC: 600 V, 250 V
• Interrupting Rating DC: 20,000 A @ 300 VDC
• Interrupting Rating AC: 200 kA, 300 kA rms symmetrical
• Ampere Rating: 4 A
• Fuse Type: Dual Element, Time Delay, Current Limiting
• Approvals: UL Listed, CSA Certified, Federal Spec WF-1814
• Series: FLSR
• Class: RK5

Certification

Datasheets