Siemens 137-65-970 Soft Starter, 3-Phase 400V AC Motor Soft Start Controller for Industrial Automation Product Overview The Siemens 137-65-970 Soft Starter is a reliable industrial automation component designed to provide smooth and controlled motor starting performance for a wide range of industrial applications. Developed with Siemens' expertise in electrical control technology, this soft starter helps improve motor operation, reduce mechanical stress, and support more