Noark UL489 Listed MCCB 400A/500A/600A 50kA-150kA Noark UL489 Listed MCCB 400A/500A/600A 50kA-150kA
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Noark UL489 Listed MCCB 400A/500A/600A 50kA-150kA Noark UL489 Listed MCCB 400A/500A/600A 50kA-150kA
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Noark UL489 3P MCCB M2S/M2N/M2H 160A-250A
Noark UL489 3P MCCB M2S/M2N/M2H 160A-250A

Noark UL489 Listed MCCB 400A/500A/600A 50kA-150kA

Brand Name:Noark
Place of Origin:China
Model Number:M3, M4
Rated Frequency (Hz):50/60Hz
Breaking Capacity:50kA,65kA,100kA,150kA
Rated Voltage:240V, 480V, 600V
Type:Molded Case
Certificate:UL489
Poles
Rated Current
SKU: 1601028010788 Category: UL Listed MCCB
  • Description
  • Additional information
  • Technical Datasheet & Downloads
  • Technical FAQ & Selection Guide
Description

Noark Electric UL489 listed Molded Case Circuit Breaker 400 Amp 500 Amp 600 Amp 50kA 65kA 100kA 150kA 240V 415V 480V MCCB

   

NOARK Electric Molded Case Circuit Breakers Ex9 Series:

– UL489 Listed, File Number E35539

– CSA Standards 22.2 No.5 File Number E355392

– IEC/EN 60947-2, CE, RoHS Compliant

– 15A to 1200A Ratings

– 600VAC Maximum

– 1 Pole, 2 Pole, 3 Pole, 4 Pole

– Thermal Magnetic or Electronic Trip Unit (LI, LSI, LSIG)

 

NOARK Electric Ex9 Series offers a complete range of Molded Case Circuit Breakers in six frame sizes: M1 – 150 A, M2 – 250 A, M3 – 400 A, M4 – 600 A, M5 – 800 A, and M6 – 1,200 A. Each frame size offers a range of interrupting voltage ratings from 240-690 Vac and 250-600 Vdc. The M series conforms to global standards that include UL489, CSA C22.2 No 5 and IEC 60947-2.

 

The Ex9 Series – M offers:
• High-breaking capacity and a new patented arc extinguishing design
• New patented technology reduces the manual operating force
• High quality compact modular with energy saving and environmentally friendly design
• Installation flexibility:
     Bus Bar Connection
     Lug Line/Load Side Connection
     Plug-In
     Rear Connection
     Draw-Out
• Fixed and adjustable trip setting units
• Wide range of accessories:
     Alarm Switch and Auxiliary Contact
     Shunt and Under-Voltage Trip
     Interlock
     NEMA and IEC Type Rotary Handle
     NEMA Type Flange Handle
     Motor Operator

 

Additional information
Weight 2 kg
Dimensions 25 × 25 × 25 cm
Rated Current

150A, 250A, 400A, 630A, 800A, 1000A, 1200A

Poles

3P, 4P

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Noark UL489 Listed MCCB 400A/500A/600A 50kA-150kA.

📥
Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.
Request Official Datasheet (PDF)
📐
2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.
Request CAD Model
Certified Standards: IEC 60898-1, IEC 60947-2, CE, RoHS, ISO 9001:2015
Manufacturer: Shanghai Newtrend Electric Co., Ltd. (Global Export Compliance)
Engineering Support: 24-hour response for custom voltage ratings, auxiliary contacts, and technical consulting.
Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Trip Unit Protection

How to choose between Thermal-Magnetic (TMD) and Electronic (Micrologic) trip units?

A

Thermal-magnetic trip units provide fixed or adjustable bimetallic overload and electromagnetic instantaneous short-circuit protection, ideal for standard industrial power distribution. Electronic microprocessor trip units offer precise digital dials for L (Long-time delay overload), S (Short-time delay short-circuit), I (Instantaneous short-circuit), and G (Ground-fault protection), delivering total time-current selectivity in modern switchgear.

Ics vs Icu Capacity

What is the technical distinction between Ultimate (Icu) and Service (Ics) breaking capacity?

A

Icu represents the absolute maximum fault current the breaker can safely interrupt, after which inspection or replacement may be needed. Ics represents the operational breaking capacity (50%, 75%, or 100% of Icu) that the breaker can clear repeatedly and remain fully operational without performance degradation. In critical healthcare, data center, and continuous industrial applications, specify breakers with Ics = 100% Icu.

3P vs 4P Neutral

When should a 4-Pole (4P) MCCB be specified instead of a standard 3-Pole (3P) MCCB?

A

A 4P breaker with a switched neutral is required in systems with dual power sources (generator / utility ATS transfer) to prevent circulating neutral currents, in IT distribution networks, and in commercial installations with heavy non-linear harmonic loads (LED drivers, variable speed drives) where neutral conductor current can exceed phase currents.

Motorized & Remote Operation

How to select manual rotary handles vs motorized electric operating mechanisms?

A

Direct or extended door rotary handles are specified when the MCCB is enclosed inside switchgear cubicles, providing padlocking and door-interlock safety. Motor operating mechanisms (electric operators) are required for automated SCADA control, remote PLC open/close operations, and automatic transfer switch (ATS) integration.

Terminal & Mounting Options

What terminal connection hardware and mounting configurations are available?

A

Standard front connection lugs accept copper or aluminum compression terminals and busbar connections. For high-density panel boards, extended spreader terminals, rear connection studs, and plug-in / draw-out base cassettes are available to facilitate rapid maintenance and modular swap-out.

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