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Noark 800A 750VDC 3Pole MCCB - 852793 (Ex9MD5B)

Noark 800A 750VDC 3Pole MCCB - 852793 (Ex9MD5B)

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  • High-current DC MCCB – designed for demanding battery and DC power systems
  • 750 V DC rated – achieved using 3 poles at 250 V DC per pole
  • Wide current range – available from 400 A to 800 A
  • High breaking capacity – patented arc extinguishing technology for DC circuits
  • AS/NZS 5139 compliant – suitable as a main battery disconnect
  • Flexible installation options – busbar, lug, plug-in, or rear connection
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  • Description
  • Downloads

Description

Overview

The Noark EX9MD 750 V DC 3 Pole MCCB Circuit Breakers (400 A – 800 A) are high-performance moulded case circuit breakers designed specifically for high-current DC applications, such as battery energy storage systems.

Primarily used on battery banks, the EX9MD range offers a more serviceable and robust alternative to traditional NH fuse bases, combining high DC breaking capacity with flexible installation and advanced protection features.

Key Features

DC Performance & Safety

  • Rated at 250 V DC per pole (3 pole configuration = 750 V DC)
  • High breaking capacity with patented arc extinguishing design
  • Designed specifically for DC circuit protection

Current Ratings & Frame Sizes

  • 315 A – 400 A models: frame size 140 × 225 × 172 mm
  • 500 A – 800 A models: frame size 195 × 300 × 142 mm
  • Suitable for large battery banks and high-power DC systems

Ease of Operation & Design

  • Patented technology reduces manual operating force
  • High-quality, compact modular construction
  • Energy-efficient and environmentally friendly design

Installation Flexibility

  • Busbar connection options
  • Lug line/load side connections
  • Plug-in and rear connection options available
  • Field-installable accessories for system customisation

Protection & Compliance

  • Fixed and adjustable trip setting units available
  • Certified to EN 60947
  • Complies with AS/NZS 5139:2019 for use as a main battery circuit breaker

Downloads

Brochure User Manual