RF381000 Lovato RF38 overload relay 6.3-10 amp dol 4kw star/delta at 5.5-7.5kw

Why Choose the RF381000?

Lovato RF381000 thermal overload relay provides reliable motor protection with phase failure/single‑phase sensitivity across a 6.3–10 A operational range. This three‑pole device offers manual or automatic reset and mounts directly on BF09 to BF38 contactors for compact installation. Rated Ui 690 V with 6 kV impulse withstand, it features IP20 frontal protection and is designed for demanding industrial panels.

Built to IEC/EN 60947-1 and 60947-4-1 and recognised by UL508 and CSA C22.2 No. 14, the RF381000 supports dependable performance from −25 to 60 °C up to 3000 m altitude. A Pollution Degree 3 design, 10 A Ith, and secure terminals (2–2.5 Nm) enhance durability and serviceability, while direct BF series compatibility streamlines assembly and maintenance.

Key Benefits

• Phase failure/single-phase sensitive protection for reliable three-phase motor safety.
• 6.3–10 A protection range suits varied motor loads.
• Manual or automatic reset options for flexible recovery after trips.
• Direct mounting on BF09–BF38 contactors saves panel space.
• Three-pole design with IP20 frontal protection enhances operator safety.
• High insulation ratings: Ui 690 V and 6 kV impulse withstand.
• Built to IEC/EN 60947 standards; UL and CSA recognised.

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 RF381000 thermal overload relay
• Installation and operation instructions
• Manufacturer datasheet (downloadable)

Applications

• Three-phase motor protection in industrial control panels
• Pumps, fans, and conveyors requiring 6.3–10 A overload protection
• Compressors and machine tools paired with BF09–BF38 contactors
• OEM and MRO applications needing manual or automatic reset options

Safety note: Install and commission only by qualified personnel. Isolate all power sources before wiring or adjustment and ensure the relay setting matches the motor’s rated current and application conditions.