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ABB

ABB BMFW440/AC300 Residual Current Circuit Breaker AC Type, 4P, 40A, 300mA

SKU: 1SYF604062R3400
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ABB BMFW440/AC300 4-Pole 40A 300mA RCCB

The BMFW440/AC300 is a 4-pole 40A residual current circuit breaker (RCCB) with a 300mA AC-type sensitivity from ABB's Formula DIN Rail range. It protects people and installations against earth fault currents and is manufactured to IEC standards, making it suitable for three-phase distribution boards across UAE residential, commercial, and light industrial installations.

Key Features

  • 4-pole configuration for three-phase and neutral circuit protection against earth leakage faults
  • 300mA AC-type sensitivity suitable for general protection against fault currents in standard distribution circuits
  • Rated operational voltage of 230/400V with a 4kV rated impulse withstand voltage for reliable insulation performance
  • IP20 degree of protection with an operating temperature range of -25°C to +55°C, suited to UAE ambient conditions
  • Genuine ABB Formula Din Rail quality — rated for 10,000 electrical and mechanical operating cycles

Technical Specifications

Specification Details
Brand ABB
Model BMFW440/AC300
Type RCCB (ELCB)
Poles 4
Rated Current (In) 40A
Sensitivity 300mA
Input Voltage Type AC
Rated Voltage (Ur) 230/400V
Rated Impulse Withstand Voltage (Uimp) 4kV
Rated Frequency 50Hz
Degree of Protection IP20
Mounting DIN Rail
Connecting Capacity Flexible 35mm² / Solid 25mm²
Electrical & Mechanical Endurance 10,000 cycles
Ambient Operating Temperature -25°C to +55°C

Applications

  • Earth fault protection for three-phase distribution boards in villas and commercial buildings
  • Main incomer protection for sub-distribution boards in FM-managed facilities
  • Fault current protection for HVAC and pump motor circuits in commercial installations
  • General earth leakage protection in retail, warehouse, and light industrial panels across the UAE

Why Buy From Deluxe Electricals?

  • Genuine ABB product — manufacturer quality guaranteed
  • Stock held in UAE for fast local delivery
  • Competitive trade pricing for bulk and project orders
  • Expert technical support from our electrical specialists
  • Trusted supplier to contractors, FM companies, and retailers across the UAE

Need bulk quantity for your project? Contact us at sales@deluxeelectricals.me for special pricing and fast delivery across the UAE.

Order by 12PM to get delivered next working day! We use 24 hours service with carriers in most cases so that you can get your order delivered on the next day.

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