What It Is and Where It Goes
The Fuji DB11-4C is a brake resistor in the Brake Systems category, subcategory Brake Resistors, under Motors & Motor Controls. It's the component that absorbs regenerative energy from a decelerating motor, dumping it as heat so the drive doesn't trip on overvoltage. You'll find it on the DC bus of a variable-frequency drive, typically mounted near the drive itself or on a separate panel bracket.