6SE3221-5DC50 - Inverter - SIEMENS

MICROMASTER Vector MMV750/3 6SE3221-5DC50, precise, rugged drive control for induction motors

Developed for demanding industrial environments, the SIEMENS MICROMASTER Vector MMV750/3 variable speed drive meets the requirements for reliable control of induction motors when torque stability and process repeatability are priorities. Powered by three-phase 3 AC 380-480 V with a ±10% tolerance and compatible with 50/60 Hz, it provides a motor power of 7.5 kW with a nominal output current of 15.8 A. The 150% overload capability for 60 seconds delivers the margin needed during starts or load peaks. Its integrated EMC filter class A limits conducted disturbances to the network, a direct benefit for workshop integration and compliance with industrial requirements. In continuous production, corrective maintenance or equipment retrofits, this drive stands out for its precise vector control and controlled commissioning.

Immediate gains for your production performance

• Controlled vector regulation – Accurate speed control and improved low-speed torque management, useful to maintain process quality during transient phases.
• Wide supply range – Accepts 3 AC 380-480 V ±10% and operates on 50/60 Hz, easing multi-site deployments and network compatibility.
• Torque reserve under overload – 150% capacity for 60 s, relevant for absorbing load peaks during starts, restarts or rapid setpoint changes.
• Simplified EMC compliance – Integrated class A filter reduces conducted emissions and eases integration into existing enclosures.
• Service continuity – Proven MICROMASTER Vector design, useful to increase reliability on critical lines and stabilise throughput.

Key specifications and build quality

The MICROMASTER Vector MMV750/3, reference 6SE3221-5DC50, is rated for a motor power of 7.5 kW with a nominal output current of 15.8 A. The unit accepts a three-phase supply 3 AC 380-480 V with ±10% tolerance, operating on either 50 or 60 Hz. The overload function up to 150% for 60 seconds secures applications with variable torque or that require a transient torque boost at start-up. The integrated EMC filter class A limits conducted disturbances and contributes to tidy wiring within the control cabinet. The vector control is designed to ensure a stable response over a wide speed range to support process holding and repeatability. SIEMENS assembly quality, combined with an industry-oriented architecture, promotes reliable long-term operation and streamlined maintenance.

Typical industrial applications

This variable speed drive is aimed at production workshops, maintenance departments and integrators seeking predictable motor control and built-in safety margin during transients. It is suitable for lines requiring adjustable speeds and controlled torque, for example conveyor drives, industrial ventilation or pumping systems, within the stated specifications. In retrofit projects or during compliance upgrades, its wide supply range and integrated filter simplify integration.

Technical differentiation and reassurance

The SIEMENS MICROMASTER Vector range is known for stable regulation and robustness in continuous operation. The MMV750/3 6SE3221-5DC50 stands out for extended network compatibility, documented overload reserve and the integration of an EMC filter class A. On standard-exchange-industry.com you benefit from expertise in industrial automation, exchange-standard solutions, new or reconditioned units, and repair services if required. Lead times are short, typically 24 to 72 h, with a warranty of 6 to 24 months depending on the chosen service.

Control your induction motors with precision and reliability. Contact our experts to confirm compatibility of the MICROMASTER Vector MMV750/3 6SE3221-5DC50 with your installation, request a quote and secure your supply.