BF0040A400 - CONTROL RELAY 4NO 400V 50/60HZ

Why Choose the BF0040A400?

The Lovato BF0040A400 is a compact control relay designed for dependable switching in industrial control panels. Part of the Control relays with AC and DC control circuit range, it features an AC coil 50/60Hz rated 400 VAC and four normally open contacts. Screw or 35 mm DIN rail mounting simplifies installation, while its BF00 designation aligns form factor within the series.

Engineered for demanding environments, the BF0040A400 offers Ui 690 V and Uimp 6 kV for strong insulation and surge withstand. With Ith 10 A and a mechanical life of 20,000,000 cycles, it delivers long-term reliability. Rated for -50 to 70 °C operation up to 3000 m altitude and conforming to IEC/EN, UL and CSA 60947 standards, it fits global panels.

Key Benefits

• Reliable switching with 4NO contacts for clear signalling.
• Compatible with screw or 35 mm DIN rail mounting.
• AC coil 50/60Hz at 400 VAC for standard industrial supplies.
• High insulation rating 690 V Ui enhances safety margins.
• Withstands 6 kV impulses for robust surge resilience.
• 10 A thermal current rating supports typical control loads.
• Long mechanical life of 20,000,000 cycles reduces downtime.
• Wide operating temperature -50 to 70 °C for harsh environments.

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: 368 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 BF0040A400 control relay
• Downloadable manufacturer data sheet
• Basic installation and safety information
• Original manufacturer packaging

Applications

• Industrial control panels and automation interfaces
• Machine interlocking and signal switching circuits
• HVAC and building services control systems
• Power distribution and auxiliary control circuits
• Process equipment status indication and logic control

Safety note: Installation and maintenance should be performed by qualified personnel; isolate power before work and tighten terminals to 1.5–1.8 Nm in accordance with IEC/EN 60947 practices.