Schneider Electric NSX400N Fixed Circuit Breaker – ComPact NSX Series
When a molded case circuit breaker fails in a high-current industrial distribution panel, the consequences are immediate and severe: unplanned production shutdowns, equipment damage from unprotected fault currents, and costly emergency maintenance that can halt operations for hours or days. In facilities running continuous processes—automotive assembly lines, chemical plants, data centers, or heavy manufacturing—an unreliable MCCB is not just an inconvenience; it is a critical liability. The Schneider Electric NSX400N eliminates this risk by delivering robust, certified overcurrent and short-circuit protection engineered for the most demanding industrial environments.
Within the globally recognized ComPact NSX Series, the NSX400N occupies the 400A frame class with a standard breaking capacity rating of 50 kA at 415 V AC—positioning it as the preferred choice for main distribution boards and sub-distribution panels in medium to large industrial installations. The ComPact NSX platform is one of Schneider Electric’s most widely deployed MCCB families worldwide, trusted by engineers across Europe, Asia-Pacific, the Middle East, and the Americas for its compact footprint, modular accessory ecosystem, and compliance with IEC 60947-2 standards.
Technical Specifications
- Model / SKU: NSX400N
- Brand: Schneider Electric
- Series: ComPact NSX
- Frame Rating: 400 A
- Breaking Capacity (Icu): 50 kA @ 415 V AC
- Mounting Type: Fixed (non-withdrawable)
- Poles: 3P / 4P configurations available
- Standard: IEC 60947-2
- Trip Unit: Compatible with TM-D (thermal-magnetic) and Micrologic electronic trip units
- Degree of Protection: IP40 (front face, door-mounted)
- Weight: Approx. 1.13 kg
- Operating Temperature: -25°C to +70°C
Key Features & Benefits
- High Breaking Capacity: 50 kA Icu ensures reliable fault clearance in high-energy distribution networks without nuisance tripping.
- Compact Design: The ComPact NSX form factor minimizes panel space while maintaining full performance, enabling denser switchboard layouts.
- Fixed Mounting: Simplified installation and lower total cost of ownership compared to withdrawable versions—ideal for applications where maintenance access is straightforward.
- Modular Accessory Ecosystem: Supports a wide range of add-on accessories including auxiliary contacts, shunt trips, undervoltage releases, and rotary handles without requiring frame modification.
- IEC 60947-2 Certified: Meets international standards for industrial circuit breakers, ensuring global compliance and acceptance by third-party inspectors and end-users.
- Long Service Life: Designed for high mechanical and electrical endurance, reducing replacement frequency and lifecycle costs.
- Wide Trip Unit Compatibility: Supports both thermal-magnetic (TM-D) and Micrologic electronic trip units, allowing precise protection coordination across complex distribution systems.
Industry & Equipment Applications
- Manufacturing & Heavy Industry: Main and sub-distribution boards in automotive plants, steel mills, and chemical processing facilities.
- Building & Infrastructure: Main incoming protection for commercial buildings, hospitals, airports, and data centers.
- Energy & Utilities: Protection of feeders in power distribution substations and renewable energy installations.
- Marine & Offshore: Switchboard protection in vessels and offshore platforms requiring IEC-certified equipment.
- OEM Machine Builders: Integration into control panels and motor control centers (MCCs) for industrial machinery.
- Water Treatment: Protection of pump drives and distribution panels in municipal water and wastewater facilities.
System Integration & Compatible Parts
The NSX400N is designed to integrate seamlessly within the Schneider Electric ComPact NSX ecosystem. Compatible and commonly paired components include:
- Trip Units: TM400D (thermal-magnetic), Micrologic 2.3 / 5.3 / 6.3 (electronic)
- Auxiliary Contacts: OF, SD, SDE auxiliary contact blocks
- Remote Operation: MX shunt trip coil, MN undervoltage release
- Mechanical Accessories: Rotary handle kits, door coupling rotary handles, padlocking devices
- Busbars & Terminals: ComPact NSX 400 A busbar adapters and lug terminal kits
- Communication Modules: IFM interface modules for Modbus, Profibus, and Ethernet connectivity (with Micrologic trip units)
Our Quality Assurance Process
At Konmask.com, every unit of the Schneider Electric NSX400N is subject to a rigorous multi-stage quality verification process before shipment:
- Source Verification: Products are sourced exclusively from authorized distributors and verified supply chains to eliminate counterfeit risk.
- Visual & Physical Inspection: Each unit is inspected for packaging integrity, label authenticity, serial number consistency, and physical condition.
- Documentation Check: Factory test certificates, CE/IEC declarations of conformity, and traceability documents are verified and available upon request.
- Functional Testing (on request): For large orders, functional testing and third-party inspection can be arranged prior to shipment.
- Secure Packaging: Anti-static and shock-resistant packaging ensures safe transit for international B2B shipments.
How to Order
- Submit your inquiry via the Contact / RFQ form on this page with your required quantity, delivery destination, and any specific configuration requirements (poles, trip unit type, accessories).
- Our technical sales team will respond within 1 business day with availability, lead time, and a formal quotation.
- Upon order confirmation, we arrange secure payment and prepare export documentation (commercial invoice, packing list, certificate of origin) for international shipments.
- Shipment is arranged via your preferred freight forwarder or our recommended logistics partners, with full tracking provided.
Why Choose Konmask.com?
- Industrial B2B Specialist: We focus exclusively on industrial automation and electrical components—no consumer electronics, no distractions.
- Global Export Experience: Experienced in exporting to Southeast Asia, the Middle East, Africa, Europe, and the Americas with full compliance documentation.
- Technical Support: Our team includes engineers who can assist with product selection, compatibility verification, and system integration questions.
- Competitive Pricing: Direct sourcing relationships enable us to offer competitive B2B pricing for both small and large volume orders.
- Fast Response: Inquiries are handled within 1 business day. Urgent requirements can be escalated for same-day response.
- Trusted Track Record: Serving industrial buyers, EPC contractors, and OEM manufacturers across 30+ countries.
Frequently Asked Questions
Q: What is the difference between NSX400N and NSX400H?
A: The NSX400N has a standard breaking capacity (Icu) of 50 kA at 415 V AC, while the NSX400H (High) offers a higher breaking capacity of 70 kA at 415 V AC. The NSX400N is suitable for most standard industrial distribution applications; the NSX400H is specified where prospective short-circuit current levels are higher.
Q: Can the NSX400N be retrofitted with a Micrologic electronic trip unit?
A: Yes. The ComPact NSX frame is designed to accept both thermal-magnetic (TM-D) and Micrologic electronic trip units. Retrofitting requires the appropriate Micrologic unit compatible with the 400 A frame. Please contact us to confirm the correct part number for your application.
Q: Is the NSX400N available in 4-pole configuration?
A: Yes, the ComPact NSX400N is available in both 3P and 4P configurations. Please specify your pole requirement when submitting your inquiry.
Q: What certifications does the NSX400N carry?
A: The NSX400N is certified to IEC 60947-2 and carries CE marking. It also meets the requirements of various national standards derived from IEC 60947-2. Specific certification documentation is available upon request.
Q: Do you provide a warranty on the NSX400N?
A: Yes. All products supplied by Konmask.com are covered by our standard warranty against manufacturing defects. Warranty terms are provided with each order confirmation. We also facilitate warranty claims with the manufacturer where applicable.
Q: Can you supply the NSX400N with accessories pre-installed?
A: For volume orders, we can arrange pre-assembly of specified accessories (auxiliary contacts, shunt trips, etc.) prior to shipment. Please indicate your requirements in your RFQ.
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