Siemens 6SE6440-2UD31-8DA1 Refurbished MICROMASTER 440 AC Drive
The Siemens 6SE6440-2UD31-8DA1, also identified as 6SE64402UD318DA1, is a Siemens MICROMASTER 440 AC Drive designed for reliable variable-speed control of three-phase AC motors in industrial automation, manufacturing, and motor control applications. This frequency inverter is designed for a 3-phase 380–480 VAC input supply with a ±10% voltage tolerance and an input frequency range of 47–63 Hz.
The 6SE6440-2UD31-8DA1 provides a 22 kW / 30 HP low-overload rating and an 18.5 kW / 25 HP high-overload rating. Siemens specifies an input current of approximately 43 A for low-overload operation and 37 A for high-overload operation. The rated output current is 45 A in low-overload operation and 38 A in high-overload operation. These specifications make the drive suitable for a broad range of industrial motor-control requirements.
The Siemens 6SE6440-2UD31-8DA1 is a MICROMASTER 440 without filter. The unit has an IP20 / UL open-type protection rating and is intended for installation inside a suitable industrial control cabinet or protected equipment enclosure. The drive supports an output frequency of up to 650 Hz for V/f control, with a production limitation of 550 Hz resulting from applicable legal requirements.
The MICROMASTER 440 platform provides flexible motor-control functionality for industrial equipment requiring controlled acceleration, deceleration, variable-speed operation, and dependable motor performance. The 6SE6440-2UD31-8DA1 supports both low-overload and high-overload operating modes. Under high-overload operation, Siemens specifies 150% output current for 60 seconds followed by 100% output current for 240 seconds in a 300-second cycle. Under low-overload operation, the drive supports 140% output current for 3 seconds, followed by 110% for 57 seconds and 100% for 240 seconds.
The drive uses a fan-based cooling system and has a compact industrial configuration. Siemens specifies dimensions of approximately 520 x 275 x 245 mm (H x W x D) and a net weight of approximately 16 kg. The unit provides 6 digital inputs, 3 relay outputs, 2 analog inputs, 2 analog outputs, and 1 PTC/KTY interface for integration with compatible industrial control systems.
York Scientific offers the Siemens 6SE6440-2UD31-8DA1 MICROMASTER 440 AC Drive as a refurbished industrial replacement. York Scientific also provides service and support for Siemens drive systems, including diagnostic evaluation, troubleshooting, component-level repair, board-level repair, and complete rebuilding when required.
Choosing a professionally refurbished 6SE6440-2UD31-8DA1 can provide a cost-effective alternative to purchasing new equipment. A refurbished Siemens MICROMASTER 440 drive can help extend the service life of existing machinery, reduce replacement expenses, and minimize production downtime when a compatible replacement drive is required.
Siemens 6SE6440-2UD31-8DA1
Our repair process is as simple as it is fast: enter details below and we will email you an RMA number along with the shipping instructions. Once we receive your defective equipment, our service team will contact and assist you until your repair is completed.
