RSE4803-B - DIN MTR SOFT START 480V 3A

Why Choose the Carlo Gavazzi RSE4803-B Soft Starter?

The Carlo Gavazzi RSE4803-B is a compact and highly efficient three-phase soft starter engineered for controlled starting and stopping of induction motors in industrial automation systems. As part of the proven Carlo Gavazzi RSE series, this semiconductor motor controller helps reduce inrush current, minimise mechanical stress and improve the operational lifespan of motors and connected drive components.

Designed for machine builders, panel manufacturers and industrial automation engineers, the RSE4803-B delivers smooth motor acceleration while reducing torque shock during startup. Its compact DIN rail mounted format allows easy installation within electrical cabinets and control panels where space efficiency and reliable motor control are essential.

With a 3 A rated operational current and support for three-phase 277–480 V AC systems, the RSE4803-B is ideal for smaller induction motors used in conveyors, pumps, fans and light industrial machinery. The integrated bypass functionality improves operating efficiency while reducing heat dissipation during continuous operation.

Key Advantages

• Compact three-phase soft starter for industrial motor control.
• 3 A operational current rating suitable for small induction motors.
• Reduces electrical inrush current and mechanical wear.
• Integrated internal bypass relay improves efficiency.
• DIN rail mounting simplifies installation in control panels.
• Adjustable ramp-up and ramp-down functionality.
• Reliable motor protection for automation systems.

Key Features

• Carlo Gavazzi RSE soft starter series.
• 3 A rated operating current.
• 277–480 V AC three-phase operating voltage.
• Integrated semiconductor bypass system.
• Two-phase controlled soft starting.
• Adjustable start and stop ramp settings.
• Flexible AC/DC control voltage compatibility.
• Compact DIN rail mounted enclosure.
• Suitable for squirrel cage induction motors.

Technical Specifications

• Manufacturer: Carlo Gavazzi
• Series: RSE Soft Starters
• Model: RSE4803-B
• Product type: Three-phase motor soft starter
• Rated operational current: 3 A
• Operating voltage: 277–480 V AC
• Rated operating voltage (Ue): 408–552 V AC
• Input phases: 3-phase
• Control voltage: 24–110 V AC/DC and 110–480 V AC
• Frequency: 50 / 60 Hz
• Protection rating: IP20
• Mounting type: DIN rail mounting
• Controlled phases: 2-phase control
• Internal bypass: Yes
• Dimensions (H × W × D): approx. 82 × 45 × 102.5 mm
• Operating temperature: approx. -20 °C to +50 °C

Efficient Motor Starting for Industrial Automation

Soft starters such as the Carlo Gavazzi RSE4803-B are designed to minimise electrical and mechanical stress during motor startup and shutdown. By gradually increasing motor voltage, the unit helps protect motors, couplings, belts and gear systems from sudden torque loads and excessive current peaks.

The RSE series is widely used in industrial machinery and automation systems where compact installation, reliable operation and reduced maintenance are important. Its integrated bypass functionality also improves efficiency by reducing heat generation during continuous motor operation.

Typical Applications

• Industrial conveyors and material handling systems.
• Pumps and water treatment equipment.
• Fans and ventilation systems.
• Compressors and light process machinery.
• Packaging and automation equipment.
• OEM machinery and industrial control systems.

Trusted by Industrial Automation Engineers

Carlo Gavazzi RSE soft starters are widely used in industrial automation systems where reliable motor starting, compact installation and reduced mechanical stress are essential for efficient machinery performance.