RF380400 Lovato RF38 overload relay 2.5-4 amp dol 1.5 kw and star/delta 2.2-3kw

Why Choose the RF380400?

Protect three-phase motors with the Lovato RF380400 thermal overload relay. This three-pole unit is phase failure/single-phase sensitive and offers an adjustable operational current of 2.5…4 A. The RF380400 supports manual or automatic resetting for flexible maintenance and fast recovery. Designed for direct mounting on BF09 to BF38 contactors, it simplifies assembly and saves panel space while delivering dependable motor protection across a wide range of industrial applications.

Built for robust performance, it features IP20 frontal protection, Ui 690 V, Uimp 6 kV, and Ith 10 A. Operating from −25 to 60 °C and up to 3000 m altitude with pollution degree 3, it suits demanding environments. Conformance to IEC/EN 60947-1 and 60947-4-1, plus UL508 and CSA C22.2 n° 14, underscores reliable quality for panel builders and OEMs.

Key Benefits

• Adjustable 2.5…4 A setting for accurate motor overload protection.
• Manual or automatic reset options streamline maintenance and recovery.
• Three-pole, phase failure/single-phase sensitive protection enhances reliability.
• Direct mounting on BF09–BF38 contactors speeds installation and saves space.
• IP20 frontal rating improves safety during panel access.
• Ui 690 V and Uimp 6 kV deliver strong insulation performance.
• Operates from −25 to 60 °C for varied environments.

Technical Specification

• Number of poles: 3
• Pollution degree: 3
• IP degree (frontal): IP20
• Rated insulation voltage Ui (IEC/EN): 690 V
• Rated impulse withstand voltage Uimp: 6 kV
• Terminal tightening torque: 2 to 2.5 Nm
• Ith (IEC): 10 A
• Operating temperature: -25 to 60 °C
• Storage temperature: -50 to 70 °C
• Max altitude: 3000 m
• Weight: 160 g

What’s Included

• Lovato RF380400 thermal overload relay
• Installation and operation instructions
• Original manufacturer packaging

Applications

• Overload protection for three-phase motor starters using BF09–BF38 contactors.
• Panels requiring phase failure and single-phase sensitive motor protection.
• Industrial automation and OEM machinery control circuits.
• Pump, fan, and conveyor motor protection within the rated current range.

Safety note: Install and adjust only by qualified personnel. Isolate power, set the 2.5…4 A range correctly for the motor, and follow all applicable standards and the manufacturer’s instructions.