BF0004A400 - CONTROL RELAY 4NC 400V 50/60HZ

Why Choose the BF0004A400?

The Lovato BF0004A400 control relay (BF00 designation) is engineered for control relays with AC and DC control circuit use. It features an AC coil 50/60Hz rated at 400VAC and four normally-closed auxiliary contacts (4NC). With screw or 35mm DIN rail mounting, it fits standard panels and supports reliable operation in demanding industrial environments.

Built for endurance, it offers 690 V rated insulation (IEC/EN), 6 kV impulse withstand, and 10 A Ith, with terminals tightened to 1.5–1.8 Nm. A mechanical life of 20,000,000 cycles and -50 to 70 °C operating range suit harsh sites up to 3000 m, pollution degree 3. Conforms to IEC/EN 60947-1 and 60947-5-1, with UL and CSA approvals.

Key Benefits

• 400VAC AC coil 50/60Hz for high-voltage control circuits.
• Four normally-closed auxiliary contacts (4NC) enable secure interlocking and status logic.
• Screw or 35mm DIN rail mounting simplifies fast, tidy panel installation.
• 690 V Ui and 6 kV Uimp provide strong insulation and surge resilience.
• Ith 10 A rating supports robust auxiliary and signalling circuit loads.
• Operates from -50 to 70 °C for cold stores and warm plant rooms.
• Long mechanical life, up to 20,000,000 cycles, reducing maintenance interruptions.
• Conforms to IEC/EN, UL and CSA standards for assured compliance.

Technical Specification

• Product type designation: BF00
• Number of poles: 4
• Rated insulation voltage Ui (IEC/EN): 690 V
• Rated impulse withstand voltage Uimp: 6 kV
• Ith (IEC): 10 A
• Terminal tightening torque: 1.5 to 1.8 Nm
• Weight: 366 g
• Mechanical life: 20000000 cycles
• Operating temperature: -50 to 70 °C
• Storage temperature: -60 to 80 °C
• Max altitude: 3000 m
• Pollution degree: 3

What’s Included

• Lovato BF0004A400 control relay unit
• User and safety information sheet
• Original manufacturer packaging

Applications

• Control circuits with 400 VAC coil supply
• Interlocking and permissive logic using 4NC auxiliary contacts
• Industrial automation panels and cabinets
• HVAC and building services control systems
• Process equipment signalling and control

Safety note: Isolate power before installation and follow applicable standards. Tighten terminals to 1.5–1.8 Nm and operate within the specified ratings and environmental limits.