Carlo Gavazzi RSBT4855CVC three-phase soft starter, a 55 A motor starting controller with Modbus communication designed for scroll compressors and industrial motors.
£1,075.63
The Carlo Gavazzi RSBT4855CVC is an advanced three-phase soft starter designed for smooth acceleration and controlled starting of scroll compressors and industrial motors. As part of the high-performance Carlo Gavazzi RSBT soft starter series, it provides reduced starting current, improved motor protection and reliable operation in HVAC, refrigeration and industrial automation systems.
This soft starter uses electronic motor control technology with three-phase control to reduce electrical and mechanical stress during motor startup. The integrated bypass function minimises heat generation during normal operation, while the DIN rail and panel mounting options allow flexible installation inside industrial control cabinets.
With a rated operating current of 55 A AC, an operating voltage range of 187–528 V AC and a 24 V AC/DC and 110–400 V AC control supply, the RSBT4855CVC is suitable for three-phase motors up to 22 kW at 400 V AC. It also includes RS-485 Modbus communication and relay outputs for integration into modern automation systems.
Soft starters such as the Carlo Gavazzi RSBT4855CVC gradually control motor starting conditions to reduce current peaks, mechanical shock and stress on connected equipment. This improves system reliability and helps extend the service life of motors and compressors.
The RSBT series is designed for OEM machine builders, HVAC engineers and industrial automation specialists requiring dependable motor starting solutions. Its integrated bypass, communication capability and flexible mounting options allow seamless integration into modern control systems.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | RSBT |
| Model | RSBT4855CVC |
| Product type | Three-phase soft starter |
| Application | Scroll compressors and industrial motor starting |
| Rated operating current | 55 A AC |
| Operating voltage | 187–528 V AC |
| Motor power at 230 V | up to 15 kW |
| Motor power at 400 V | up to 22 kW |
| Control supply voltage | 24 V AC/DC and 110–400 V AC |
| Number of phases | 3-phase |
| Controlled phases | 3 |
| Internal bypass | Yes |
| Communication | RS-485 Modbus |
| Relay outputs | 2 |
| Protection rating | IP20 |
| Mounting type | DIN rail / panel mounting |
| Dimensions (W × H × D) | 120 × 150 × 150 mm |
| Weight | approx. 2.8 kg |
The RSBT4855CVC is a three-phase soft starter designed for controlled starting of scroll compressors and industrial motors.
The soft starter supports three-phase motors up to approximately 22 kW at 400 V AC.
The unit operates from a 187–528 V AC three-phase supply with a 24 V AC/DC and 110–400 V AC control supply.
Yes, the RSBT4855CVC includes RS-485 Modbus communication for integration with compatible automation systems.
The RSBT4855CVC supports DIN rail and panel mounting inside industrial control cabinets.
Carlo Gavazzi RSBT soft starters provide reliable motor starting control for industrial automation, HVAC and compressor applications requiring efficient and controlled acceleration.
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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...