RFE450200 Lovato RFE overload relay 0.4-2 amp dol 0.12-0.75kw

Why Choose the Lovato RFE450200 Electronic Thermal Overload Relay?

The Lovato RFE450200 is a compact and highly accurate electronic thermal overload relay designed to provide advanced protection for three-phase electric motors in industrial automation and motor control systems. As part of the intelligent Lovato RFE electronic motor protection relay series, it is specifically engineered to protect motors against overload conditions, phase failure and single-phasing faults while delivering highly precise electronic tripping performance.

Unlike conventional thermal overload relays, the RFE450200 uses advanced electronic sensing technology to provide enhanced tripping accuracy, reduced heat dissipation and selectable tripping characteristics for improved motor protection flexibility. Its direct mounting design enables rapid installation onto compatible Lovato BF09 to BF38 contactors, simplifying control panel assembly and reducing installation time.

With an adjustable operating current range of 0.4–2 A, integrated phase-failure sensitivity, selectable trip classes 5, 10, 20 and 30, plus both manual and automatic reset modes, the RFE450200 is ideal for protecting small industrial motors used in pumps, conveyors, fans, compressors and automated machinery. Its compact industrial construction ensures dependable long-term operation in demanding industrial environments.

Key Advantages

• Accurate electronic thermal overload protection for three-phase motors.
• 0.4–2 A adjustable operating range for small motor applications.
• Integrated phase-failure and single-phase sensitivity.
• Selectable tripping classes 5, 10, 20 and 30.
• Manual or automatic reset operation for flexible system integration.
• Direct mounting onto Lovato BF series contactors.

Key Features

• Lovato RFE electronic overload relay series.
• 0.4–2 A operational current range.
• Electronic thermal motor protection relay.
• Integrated phase-loss protection.
• Selectable tripping classes: 5 / 10 / 20 / 30.
• 1 NO + 1 NC auxiliary contacts included.
• Manual and automatic reset modes.
• Compatible with BF09 to BF38 contactors.

Technical Specifications

• Manufacturer: Lovato Electric
• Series: RFE Electronic Thermal Overload Relays
• Model: RFE450200
• Product type: Electronic thermal overload relay
• Operational current range: 0.4–2 A
• Number of poles: 3-pole
• Tripping classes: 5 / 10 / 20 / 30 selectable
• Reset type: Manual or automatic reset
• Protection type: Phase failure / single-phase sensitive
• Auxiliary contacts: 1 NO + 1 NC
• Mounting type: Direct mounting on contactor
• Compatible contactors: BF09 to BF38
• Protection rating: IP20
• Rated operational voltage: 690 V
• Rated insulation voltage: 1000 V
• Rated impulse withstand voltage: 6 kV
• Operational frequency: 50 / 60 Hz
• Terminal type: Screw and washer terminals
• Terminal screw size: M4
• Terminal tightening torque: 3.1 Nm
• Operating temperature: -25 °C to +70 °C
• Storage temperature: -55 °C to +80 °C
• Maximum altitude: 3000 m
• Weight: approx. 208 g
• EAN: 8013975230237
• Compliance: IEC/EN 60947-1, IEC/EN 60947-4-1, UL60947-1, CSA C22.2 No.60947

Advanced Electronic Motor Protection for Industrial Applications

Electronic overload relays such as the Lovato RFE450200 continuously monitor motor current using advanced electronic sensing technology to provide highly accurate overload protection. This helps prevent motor overheating, winding damage and costly production downtime while improving operational reliability and equipment lifespan.

The RFE series is specifically designed for industrial automation systems requiring precise motor protection and flexible tripping performance. Its selectable trip classes allow engineers to optimise protection settings for different motor starting conditions and application requirements.

Typical Applications

• Industrial conveyors and material handling systems.
• Pumps, compressors and ventilation equipment.
• Packaging and production machinery.
• Machine tools and automation systems.
• OEM motor starter assemblies and control panels.
• Precision motor protection applications requiring electronic overload sensing.

Trusted by Industrial Automation Engineers

Lovato RFE electronic overload relays are widely trusted by panel builders and automation engineers for accurate motor protection, flexible configuration and dependable long-term operation in industrial control systems.