RFN383800 - T/O RELAY 32-38A MAN/AUTO

Why Choose the RFN383800?

Lovato RFN383800 is a three‑pole thermal overload relay for reliable motor protection in three‑phase applications. This non phase failure / non single‑phase sensitive unit covers an operational current range of 32…38 A and supports manual or automatic resetting. Designed for direct mounting on BF09–BF38 contactors, it offers straightforward integration, with IP20 frontal protection and a rated insulation voltage Ui of 690 V.

Built for demanding panels, the RFN383800 withstands 6 kV impulse (Uimp) and meets Pollution degree 3. It conforms to IEC/EN 60947‑1 and 60947‑4‑1, with additional UL508 and CSA C22.2 n° 14 approvals. The relay operates from −25 to 60 °C, stores −50 to 70 °C, and is suitable up to 3000 m altitude. Terminal screws tighten to 2–2.5 Nm, and the device weighs 160 g.

Key Benefits

• Adjustable 32…38 A range for precise motor overload protection.
• Direct mounting on BF09–BF38 contactors reduces wiring and saves space.
• Three‑pole design suited to three‑phase motor starters.
• Manual or automatic reset modes support flexible restart strategies.
• IP20 frontal protection enhances safety during operation and maintenance.
• High insulation rating Ui 690 V and Uimp 6 kV resilience.
• Conforms to IEC/EN 60947 with UL and CSA approvals for global use.

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 RFN383800 thermal overload relay
• Mounting and operation leaflet
• Factory packaging for protection during transit

Applications

• Motor protection with BF09–BF38 BF series contactors
• Three‑phase motor starters requiring non single‑phase sensitive relays
• Industrial control panels within −25…60 °C and up to 3000 m altitude
• Installations requiring compliance with IEC/EN 60947 standards

Safety note: Install and commission only by qualified personnel. Set the relay to match the motor current, observe the stated ratings and standards, and isolate all power before installation or maintenance.