12.F5.B1B-350A KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 12.F5.B1B-350A is part of the F5 Combivert Axis Drives series and supports a maximum motor power of 5 HP with an input rated current of 13 Amps at 400 Volts. It features an integrated brake transistor, delivers an output rated power of 6.6 kVA, and has a rated switching frequency of 4 kHz. The drive measures 220 mm in height, 90 mm in width, and weighs 2 kilograms.
Internal Product Review
The 12.F5.B1B-350A is a KEB Combivert F5 axis drive configured for 3-phase 400 V input service. An integrated brake transistor and 9.5 A output rated current support precise deceleration control and stable motor operation. A very capable drive for efficient axis applications.
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Product Description:
The 12.F5.B1B-350A is an inverter module manufactured by KEB within the F5 Combivert Axis Drives series. As an axis drive, it converts a fixed-frequency three-phase mains supply into a variable voltage and frequency output, allowing closed-loop speed and torque control of synchronous or induction motors in automated machinery, conveyors, and material-handling cells. This model is intended for cabinet installation where compact dimensions and an integrated brake transistor support decentralized energy management during rapid deceleration cycles.
The drive operates from a three-phase supply at 400 V and draws up to 13 A under rated load. Internally, it modulates the DC link with insulated-gate transistors switching at 4 kHz, producing a sinusoidal output with a capacity of 6.6 kVA. Continuous motor current is limited to 9.5 A, while an electronic trip disengages the output if the current reaches 21 A, preventing semiconductor overstress. These ratings correspond to the thermal limits for inverter size code 12 and support servo tasks that require periodic regeneration through the built-in braking element. When short-term mechanical demand peaks, the stored energy is diverted through that transistor rather than being returned to the mains.
During dynamic events, the current may briefly rise to 17 A, a level accommodated by the protective algorithms without activating the overcurrent shutdown. Overall heat generated by switching losses and conduction paths totals 150 W, so cabinet ventilation must clear this load along with the 135 W of DC bus dissipation. The assembly can control motors up to 5 HP, matching small hoists, indexing tables, or spindle drives. With a 90 mm width, 220 mm height, 166 mm depth, and 2 kg mass, the unit fits densely packed multi-axis lines while leaving space for line reactors or EMI filters.
