RF933 Lovato RF9 overload relay for bg contactors 2-3.3 amp 1.1 kw

Why Choose the Lovato 11RF933 Thermal Overload Relay?

The Lovato 11RF933 is a compact and highly reliable thermal overload relay engineered to provide dependable protection for three-phase electric motors in industrial automation and control systems. As part of the advanced Lovato RF9 motor protection relay series, it is specifically designed to protect motors against overload conditions, phase failure and single-phasing faults in demanding industrial environments.

This overload relay improves operational safety and motor reliability by disconnecting the motor during abnormal current conditions. Its direct mounting design enables seamless installation onto compatible Lovato BG06, BG09 and BG12 mini-contactors, helping machine builders and panel manufacturers reduce installation time while maintaining compact panel layouts.

With an adjustable current range of 2.2–3.3 A, integrated phase-failure sensitivity and a robust manual reset mechanism, the 11RF933 is ideal for protecting industrial motors used in pumps, compressors, conveyors, fans and automation machinery. Its compact construction and reliable Class 10A tripping performance make it suitable for continuous industrial operation.

Key Advantages

• Reliable thermal overload protection for three-phase motors.
• 2.2–3.3 A adjustable overload setting for flexible motor protection.
• Integrated phase-failure and single-phase sensitivity.
• Manual reset operation for controlled restart procedures.
• Direct mounting onto Lovato BG series mini-contactors.
• Compact industrial design simplifies panel installation and maintenance.

Key Features

• Lovato RF9 thermal overload relay series.
• 2.2–3.3 A overload adjustment range.
• Three-pole motor protection relay.
• Integrated phase-loss protection.
• Class 10A tripping characteristic.
• 1 NO + 1 NC auxiliary contacts included.
• Manual reset functionality.
• Compatible with BG06, BG09 and BG12 contactors.

Technical Specifications

• Manufacturer: Lovato Electric
• Series: RF9 Thermal Overload Relays
• Model: 11RF933
• Product type: Thermal overload relay
• Adjustable current range: 2.2–3.3 A
• Number of poles: 3-pole
• Tripping class: Class 10A
• Reset type: Manual reset
• Protection type: Phase failure / single-phase sensitive
• Auxiliary contacts: 1 NO + 1 NC
• Mounting type: Direct mounting on contactor
• Compatible contactors: BG06, BG09, BG12
• Protection rating: IP20
• Rated insulation voltage: 690 V
• Operating temperature: -20 °C to +55 °C
• Weight: approx. 115 g

Reliable Motor Protection for Industrial Applications

Thermal overload relays such as the Lovato 11RF933 continuously monitor motor current and disconnect the supply during overload or phase-loss conditions. This helps prevent motor overheating, winding damage and costly production downtime while improving equipment lifespan and operational safety.

The RF9 series is widely used in industrial control systems requiring dependable and compact motor protection solutions. Its integrated phase-failure sensitivity rapidly detects abnormal operating conditions caused by voltage imbalance or single-phasing faults, helping ensure improved protection for motors and connected machinery.

Typical Applications

• Industrial conveyors and material handling systems.
• Pumps, compressors and ventilation equipment.
• Packaging and processing machinery.
• Machine tools and production equipment.
• OEM control panels and motor starter assemblies.
• General industrial motor protection applications.

Trusted by Industrial Automation Engineers

Lovato RF9 thermal overload relays are widely trusted by panel builders and automation engineers for dependable motor protection, compact installation and reliable long-term operation in industrial control systems.