Danfoss 134N9351 VLT Soft Starter MCD50331BT7G3X00CV2 soft starter for controlled starting and stopping of industrial three-phase motors with 331 A operational current.
The Danfoss 134N9351 is a premium VLT® AutomationDrive frequency converter designed to provide precise speed and torque control for three-phase AC motors in demanding industrial applications. As part of the proven Danfoss VLT® AutomationDrive series, it delivers exceptional reliability, high energy efficiency and flexible integration with modern industrial automation systems. The AutomationDrive platform is engineered for continuous-duty operation and supports both induction and permanent magnet motors.
Built for machine builders, OEM manufacturers and process industries, the VLT® AutomationDrive combines advanced vector motor control with intelligent diagnostics and flexible communication options. Its innovative thermal management and back-channel cooling system help maximise uptime while reducing maintenance requirements and operating costs.
The Danfoss 134N9351 is ideally suited to industrial applications requiring dependable variable speed motor control, including conveyors, pumps, compressors, fans, mixers and manufacturing equipment. Its compact panel-mounted construction allows easy integration into electrical control cabinets while providing dependable long-term performance.
Variable frequency drives regulate motor speed by adjusting output voltage and frequency, allowing industrial machinery to operate more efficiently while reducing energy consumption and mechanical stress. The Danfoss VLT® AutomationDrive series is recognised globally for its robust construction, intelligent monitoring capabilities and suitability for demanding industrial environments.
With support for multiple industrial communication protocols and advanced automation features, the AutomationDrive integrates seamlessly into manufacturing plants, material handling systems and process industries to improve productivity and maximise equipment availability.
| Current | 331 A |
|---|---|
| Voltage | 110 V |
| Phase | Three Phase |
| IP Rating | IP00 |
| Series | VLT® Soft Starter MCD 500 |
| Part number | 134N9351 |
| Product type | Soft starter |
| Rated current | 331 A |
| Input voltage | 380–690 V AC |
| Input phases | 3-phase |
| Control voltage | 110 VAC / 220 VAC |
| Protection rating | IP00 |
| Mounting type | Panel mounting |
| Frame size | G3 / Frame 3 |
| Gross weight | approx. 32 kg |
| Net weight | approx. 30.2 kg |
| EAN | 5710107953561 |
The Danfoss 134N9351 provides variable speed control for three-phase AC motors used in industrial automation and process applications.
It is an industrial AC variable frequency drive from the Danfoss VLT® AutomationDrive range.
The drive supports both induction motors and permanent magnet motors depending on the application.
Yes. By matching motor speed to actual process requirements, it helps reduce energy consumption while maintaining optimum system performance.
It is typically installed inside industrial electrical control panels for manufacturing, material handling and process automation applications.
Danfoss VLT® AutomationDrive frequency converters are trusted worldwide for dependable motor control, outstanding efficiency and long-term reliability across demanding industrial applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...