Drive selection memo — 6SL3200-6AM21-0BH0
The Siemens 6SL3200-6AM21-0BH0 is a SINAMICS G120P variable speed drive in Frame Size B, rated for 4 kW power output and 10.2 A continuous output current at 400 V operating voltage. It ships with an integrated Filter B for conducted emissions compliance per EN 61800-3, which means it meets the standard for EMC in the first environment (residential or light industrial) without an external filter — one less component to mount and wire in the panel. Output frequency reaches 550 Hz, which covers high-speed spindle applications and centrifugal loads beyond the standard 50/60 Hz mains frequency. The overload capacity profile — 110 % for 57 seconds and 150 % for 3 seconds every 300 seconds — is typical for pump and fan duty in the G120P series, where short-duration overloads occur during start-up or momentary load spikes.
Onboard communication includes Modbus/RTU, RS485/USS, and BACnet MS/TP as standard. Optional PROFIBUS, PROFINET, and CANopen modules can be added via the drive's slot system, so the same base unit can be adapted to different fieldbus architectures without changing the power stage. This is useful when a single spare drive must cover multiple line protocols. The drive carries 4 analog inputs, 2 analog outputs, and 6 digital inputs.
For a maintenance-spares buyer holding a G120P install base, this is the correct drop-in replacement for any existing FSB, IP55, Filter B unit. No rewiring or parameter conversion is needed — the same mounting footprint, the same I/O assignment, the same comms options. Keep one in the cabinet as a critical spare before the failure.