The 6SL3520-1XH63-0AB0 combines two ceiling-reaching specifications in one drive: the highest fanless power rating in the G115D series (3 kW FSB) and the AB0 integrated braking chopper. At 15.4 A with natural convection cooling, it is the most capable fanless drive Siemens offers in the G115D wall-mounted format — and the only 3 kW variant with built-in brake control.

3 kW fanless with braking — the unique combination

This drive is for the conveyor section that needs three things simultaneously: 3 kW of shaft power, zero fan maintenance, and the ability to brake a load on a decline or a stop-and-go cycle. The AB0 braking chopper switches an external resistor (minimum 80 Ω for FSB) across the DC link when the motor regenerates, preventing the overvoltage trips that would stop the line. At 3 kW, the regenerated energy from a loaded declining conveyor section is significant — enough that the drive's internal capacitors alone cannot absorb it repeatedly. The braking chopper and external resistor handle that duty, converting the regenerated energy to heat outside the drive enclosure.

1XH63 AB0 — the most fully specified fanless G115D

The 1XH63 sub-code with AB0 suffix represents the maximum functional specification achievable without adding a cooling fan: 3 kW, braking chopper, IP65/IP66, natural convection. For a conveyor system architect, this is the drive that solves three design constraints — power, braking, and maintenance-free cooling — in one ordering code.