Branson BRA 400-034-BF1 AC Frequency Inverter

Bonfiglioli Vectron BRA 400-034-BF1 AC frequency inverter, a member of the Vectron BRA 400 series, is a 3-phase variable-frequency drive designed to power Branson ultrasonic/vibration welding equipment that requires 400/480 V AC input. The BF1 variant provides adjustable output frequency and torque control to drive industrial motors, enabling precise welding cycles and repeatable process performance in Branson installations such as the VW-6 vibration welder. The unit supports 50/60 Hz mains in 400/480 V three-phase systems and is documented in distributor catalogs under Branson/Vectron branding. Distributors list BRA 400 family models, including BRA 400-034-BF1, as discontinued by the manufacturer, which can influence availability and service options for legacy Branson systems. The BRA 400-034-BF1 designation reflects an exact fit within Branson/Vectron control ecosystems, and buyers commonly encounter this part when maintaining or retrofitting Branson VW-6 vibration welder equipment that relies on high-voltage drives for motor control.