RFN381800 - T/O RELAY 13-18A MAN/AUTO

Why Choose the RFN381800?

Engineered for reliable motor protection, the Lovato RFN381800 thermal overload relay (SKU RFN381800) covers a 13–18 A operational range. This three‑pole, non phase failure/non single‑phase sensitive device offers manual or automatic resetting and direct mounting on BF09–BF38 contactors, streamlining panel layouts. It is an ideal choice for safeguarding three‑phase motors where compact assembly and straightforward adjustment are required.

Built to IEC/EN 60947 with UL508 and CSA C22.2 n° 14 conformity, it features IP20 frontal protection, Ui 690 V and 6 kV impulse withstand. Operating from −25 to 60 °C up to 3000 m, it suits demanding UK industrial environments. Additional details include pollution degree 3, Ith 10 A and 2–2.5 Nm terminal torque, all in a compact 160 g package.

Key Benefits

• Adjustable 13–18 A range for versatile motor overload protection.
• Direct mounting on BF09–BF38 contactors saves panel space.
• Manual or automatic reset modes support varied control strategies.
• Three‑pole design suits three‑phase motor circuits.
• IP20 frontal protection reduces accidental contact at terminals.
• Robust insulation: Ui 690 V and 6 kV impulse withstand.
• Compliant with IEC/EN 60947, UL508 and CSA standards.

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 RFN381800 thermal overload relay
• Mounting and terminal instructions
• Manufacturer datasheet
• Compliance and safety information

Applications

• Protecting three‑phase motors within the 13–18 A range
• Control panels using Lovato BF09–BF38 contactors
• Pumps, fans, conveyors and general industrial machinery
• Retrofits where manual or automatic resetting is required

Safety note: Installation and adjustment must be performed by qualified personnel. Set within the 13–18 A range, tighten terminals to 2–2.5 Nm, and observe ambient, altitude and IP20 limitations per the manufacturer’s instructions.