Lovato 51ADX0142B severe-duty three-phase soft starter rated at 142 A for 208–500 V AC asynchronous motors, with an integrated bypass contactor and IEC motor ratings up to 90 kW.
£5,882.45
The Lovato 51ADX0142B is an advanced three-phase soft starter designed for controlled starting and stopping of asynchronous three-phase motors in demanding industrial applications. As part of the Lovato Electric ADX...B soft starter series, it is designed for severe-duty operation with a starting current of up to 5 × Ie and incorporates an integrated bypass contactor.
The 51ADX0142B provides three-phase control with torque or voltage ramp starting and current limitation. Multiple stopping modes include torque ramp, voltage ramp and free-wheel stopping, while motor protection functions include starting and running overload protection, locked-rotor detection, current asymmetry monitoring, minimum-torque protection and overtemperature protection.
With a rated starter current of 142 A and a three-phase 208–500 V AC supply, the 51ADX0142B supports IEC motor ratings of 37 kW at 230 V AC, 75 kW at 400 V AC and 90 kW at 500 V AC. Its integrated bypass contactor, forced cooling system and built-in LCD interface make it suitable for demanding industrial motor-starting applications.
Soft starters progressively control the electrical power supplied to a motor during acceleration, helping to reduce the high starting current and mechanical stress associated with direct-on-line starting. The Lovato 51ADX0142B provides three-phase control with configurable torque or voltage ramp starting, allowing acceleration to be matched to the requirements of the motor and driven equipment.
The integrated bypass contactor carries the motor current after the starting sequence is complete. Motor protection functions include overload protection during starting and running, locked-rotor detection, current asymmetry monitoring, minimum-torque protection and overtemperature monitoring, while additional starter protection helps safeguard the soft starter itself.
| HS Code | 85371098 |
|---|---|
| Manufacturer | Lovato Electric |
| Series | ADX...B |
| Model | 51ADX0142B |
| Product type | Advanced three-phase soft starter |
| Motor type | Asynchronous three-phase |
| Duty | Severe duty, starting current 5 × Ie |
| Rated starter current | 142 A |
| Rated supply voltage | 208–500 V AC |
| Auxiliary supply voltage | 208–240 V AC |
| Rated frequency | 50/60 Hz |
| Rated motor power at 230 V AC | 37 kW |
| Rated motor power at 400 V AC | 75 kW |
| Rated motor power at 500 V AC | 90 kW |
| UL motor rating at 220–240 V AC | 50 HP |
| UL motor rating at 380–415 V AC | 75 HP |
| UL motor rating at 440–480 V AC | 100 HP |
| Number of controlled phases | 3 |
| Built-in bypass | Yes |
| Cooling system | Forced cooling |
| Display | Backlit LCD, 2 × 16 characters |
| Starting method | Torque or voltage ramp with current limitation |
| Stopping methods | Torque ramp, voltage ramp and free-wheel stop |
| Braking method | DC dynamic braking with external relay |
| Digital inputs | 3 |
| Analogue inputs | 1 |
| Digital outputs | 4 |
| Analogue outputs | 1 |
The Lovato 51ADX0142B is an advanced three-phase soft starter designed for controlled starting and stopping of asynchronous three-phase motors in severe-duty industrial applications.
The 51ADX0142B has a rated starter current of 142 A.
Under IEC ratings at up to 40 °C, the soft starter supports 37 kW at 230 V AC, 75 kW at 400 V AC and 90 kW at 500 V AC.
Yes. The Lovato 51ADX0142B has an integrated bypass contactor for efficient operation after the motor starting sequence is complete.
The 51ADX0142B has a three-phase rated supply voltage of 208–500 V AC and requires a 208–240 V AC auxiliary supply.
Lovato Electric ADX soft starters provide advanced three-phase motor starting and stopping control, combining integrated motor protection, flexible control functions and built-in bypass technology for demanding industrial applications.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...