Littelfuse JLS040 - UL Class J Fast-Acting Fuse 40A 600V (200kA AIC)

Littelfuse JLS040 is a UL Class J fast-acting fuse designed for overcurrent protection in low-voltage circuits up to 600V AC. With a 40A current rating and 200kA interrupting capacity at 600V, it provides reliable short-circuit protection in demanding industrial environments. The fuse features a compact ferrule design with a 0.81-inch diameter and 2-3/8-inch length, constructed for fast-acting (FA) response to fault conditions. It meets multiple safety certifications including UL 248-8 Class J, CSA, and CE standards, with QPL-W-F-1814 military qualification. Typical applications include motor protection, transformer circuits, and industrial power distribution systems requiring high interrupting capacity.

Key Features & Specifications

• Type: UL Class J fast-acting fuse with ferrule connection
• Voltage Rating: 600V AC
• Current Rating: 40A
• Dimensions: 0.81" diameter x 2-3/8" length
• Standards: UL 248-8 Class J, CSA Certified, CE, QPL-W-F-1814
• Applications: Motor protection, transformer circuits, industrial power distribution
• Class Rating: J
• Connection: Ferrule
• Barrels: 1
• Velocity: FA (Fast Action)
• AIC rating: 200kA@600Vac
• Weight: 0.17 lb
• Country of Origin: Mexico

Product Identification

• UPC: 079458200751
• GTIN: 00079458200751