SKB3400110 Emerson Unidrive M100 AC Drive 1HP 480V 3-Phase Compact VFD The Emerson SKB3400110 is a robust and compact AC drive from the renowned Unidrive M100 series, designed for open-loop vector control applications. Rated for 1HP at 480V 3-phase input, the Emerson SKB3400110 delivers exceptional performance for general-purpose industrial machinery. Its space-saving design allows for easy installation in tight control panels while maintaining high efficiency and reliability