RFA825000 - OVERLOAD RELAY 35-50A BF40-BF80 AUTO

Why Choose the RFA825000?

Lovato RFA825000 thermal overload relay provides dependable motor protection for three‑phase applications. This three‑pole, phase failure/single‑phase sensitive relay automatically resets and covers a 35…50 A operational current range. Designed for direct mounting on BF40…BF94 contactors, it simplifies panel assembly while maintaining compact IP20 frontal protection. The RFA825000 supports up to 690 V rated insulation (Ui) with 8 kV impulse withstand, aligning with demanding industrial environments.

Built to recognised standards IEC/EN 60947‑1 and 60947‑4‑1, with UL508 and CSA approvals, this unit operates reliably from −20 to 55 °C and up to 3000 m altitude. It features a pollution degree 3 design and 10 A Ith, with robust terminals rated 3.9 Nm. Compact 365 g construction aids straightforward installation and service.

Key Benefits

• Automatic resetting minimises downtime after overload events.
• Adjustable 35…50 A range suits varied three‑phase motor loads.
• Phase failure/single‑phase sensitive protection enhances motor safety.
• Direct mounting on BF40…BF94 contactors speeds installation.
• IP20 frontal protection with Ui 690 V, Uimp 8 kV.
• Operates −20 to 55 °C, up to 3000 m altitude.
• Meets IEC/EN, UL, 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: 8 kV
• Terminal tightening torque: 3.9 to 3.9 Nm
• Ith (IEC): 10 A
• Operating temperature: -20 to 55 °C
• Storage temperature: -55 to 80 °C
• Max altitude: 3000 m
• Weight: 365 g

What’s Included

• Lovato RFA825000 thermal overload relay
• Product datasheet and installation guidance
• Protective packaging for transit

Applications

• Three‑phase motor protection within 35…50 A operating range
• Direct mounting on BF40…BF94 contactors in control panels
• Industrial pumps, fans, and conveyors requiring overload protection
• Compressors and processing machinery with phase‑loss sensitivity

Safety note: Install and commission only by qualified personnel with power isolated; set the overload range to the motor’s rated current and observe applicable standards and environmental limits.