Mersen HSJ70

The High-Speed Class J (HSJ) fuse integrates the low I₂t characteristics of semiconductor fuses with the branch-circuit performance standards of Class J UL Listed fuses. This design supports branch circuit protection in compliance with NEC regulations while offering significantly low I₂t values, making it suitable for safeguarding power semiconductors such as diodes, SCRs, GTOs, and SSRs.

With a rated voltage of 600V AC and 500V DC, this fuse operates at a current rating of 70A. Its construction includes silver-plated copper terminals and is housed in a GMG insulating material. The device has a maximum interrupting rating (I₁) of 200 kA, ensuring high-performance protection capabilities. The HSJ fuse is also ROHS compliant, reflecting its adherence to environmental standards. Designed for clip mounting, it measures 4.63 inches in length and has a diameter of 1.06 inches, while weighing 0.23 lb.