Littelfuse SPFJ-300 - Class J Time-Delay Fuse 300A (200kA AIC @ 600VAC)

Littelfuse SPFJ-300 is a Class J time-delay fuse designed for providing superior circuit protection in high-fault current applications. It features a 300A current rating with robust voltage ratings of 600V AC and 1000V DC, ensuring reliable performance. The fuse is constructed with a 5.19 lb bolt-on configuration for secure installation and features a high interrupting rating of 200kA at 600V AC and 10kA at 1000V DC. It complies with RoHS standards and carries major certifications including UL, IEC, VDE, and cUL. This fuse is typically applied in industrial power distribution systems, motor protection, and feeder circuits where high interrupting capacity and time-delay characteristics are required.

Key Features & Specifications

• Type: SPFJ, Class J Time-Delay Fuse, Bolt-On Connection
• Voltage Rating: 600V AC, 1000V DC
• Current Rating: 300A
• AIC Rating: 200kA @ 600V AC, 10kA @ 1000V DC
• Poles: 1
• Weight: 5.19 lb
• Standards: RoHS
• Certification: UL, IEC, VDE, cUL
• Applications: Industrial power distribution, motor protection, feeder circuits