FatafatService Logo
No Image Available

Havells DHMGIFPX040

The Havells DHMGIFPX040 is a high-performance 4-pole (FP) main switch disconnector engineered for precise control over 3-phase and neutral circuit isolation. As a cornerstone of the DHMGI series, this 40A device operates at 415V and is classified under the AC-23A utilization category, making it capable of handling frequent switching of highly inductive loads. Built with high-grade thermoplastic and designed for DIN Rail mounting, it provides a robust, manual isolation point for professional electrical distribution networks.

Quick Answer

The Havells DHMGIFPX040 is primarily used as a master isolation switch in 3-phase (415V) distribution boards for residential and commercial buildings, allowing for safe manual disconnection of power for maintenance or emergency stop scenarios.

✓40A Current Capacity: Optimized for medium-to-heavy 3-phase electrical loads.
✓AC-23A Utilization: Certified for switching motors and other high-inductive loads safely.
✓4-Pole Configuration: Ensures simultaneous isolation of all three phases and the neutral line.
✓IP40 Protection: Features a thermoplastic housing that guards against solid objects over 1mm.
✓DIN Rail Compatibility: Standard 35mm mounting for seamless integration into modular DBs.

Choose the Havells DHMGIFPX040 if you need a reliable, space-saving 40A isolator for a 3-phase system. It is the gold standard for users who prioritize mechanical durability and AC-23A switching capabilities in a modular DIN Rail format.

✓ Who Should Buy

  • •Electricians setting up 3-phase distribution boards in commercial shops or offices.
  • •Industrial maintenance teams requiring local isolation for 40A machinery.
  • •Homeowners with high-capacity 3-phase central air conditioning systems.

✕ Who Should Avoid

  • •Users requiring automatic short-circuit or overload protection (an MCB or MCCB is required instead).
  • •Outdoor installations without a secondary weatherproof (IP65+) enclosure.
Product Overview
The Havells DHMGIFPX040 serves as a critical safety interface within modern electrical infrastructures. Unlike standard switches, this disconnector is designed for 'Isolation-on-Load' functionality, providing a clear and reliable break in the circuit. Its four-pole architecture is specifically intended for 3-phase plus neutral systems, ensuring that no residual voltage remains in the neutral path during maintenance, which is vital for electrician safety in complex commercial installations. Housed in a flame-retardant thermoplastic casing, the DHMGIFPX040 is built to withstand the thermal stresses of continuous duty. Its manual toggle mechanism is engineered for a positive snap-action feel, reducing arcing during the opening and closing of contacts. While it does not provide automatic overcurrent protection, its high-voltage 415V rating and AC-23A duty cycle make it an essential component upstream of MCBs or downstream of main distribution transformers.

BrandHavells
Model NameDHMGIFPX040
TypeMain Switch Disconnector
SeriesDHMGI Series
Housing MaterialThermoplastic
Country Of OriginIndia
Release Year2015

Related Products

Engineering Analysis
The internal switching geometry of the DHMGIFPX040 utilizes a bridge-contact system that ensures a double-break per pole. This design effectively doubles the air gap during isolation, significantly increasing the dielectric strength across the open contacts. The terminal design features deep-set screw terminals with a high-torque capacity to prevent loose connections, which are the primary cause of thermal failure in 40A circuits. Furthermore, the 4-pole synchronized movement is factory-calibrated to ensure the neutral contact closes before the phases (Make-First) and opens after the phases (Break-Last), protecting sensitive 230V equipment from neutral-shift voltage spikes.

Technical Support & FAQs