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Telemecanique NSX400S

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Marvo Stock ID MV-U8HF
SKU NSX400S
Condition New unboxed
Warranty 12 months
Weight (lbs) 17.64
Length (inches) 4.33
Width (inches) 5.51
Height (inches) 10.04

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Specification & Description

Specification Description
Part Number NSX400S
Manufacturer Telemecanique
Product Name ComPacT NSX400S DC Circuit Breaker
Rated Current 400 A at 40 °C
Rated Operational Voltage 750 V DC
Rated Insulation Voltage 750 V DC conforming to IEC 60947-2
Rated Impulse Withstand Voltage 8 kV conforming to IEC 60947-2
Number of Poles 3P or 4P
Breaking Capacity 100 kA at 750 V DC
Trip Unit Technology Thermal-magnetic
Trip Unit Protection Functions LI (Overload and Short-circuit Protection)
Mounting Mode Fixed
Mounting Support Backplate
Control Type Toggle
Dimensions (W x H x D) 140 mm x 255 mm x 110 mm
Net Weight 8.0 kg
Standards EN/IEC 60947
Product Certifications CCC, EAC, Marine
IP Degree of Protection IP40 conforming to IEC 60529
IK Degree of Protection IK07 conforming to IEC 62262
Ambient Air Temperature for Operation -25…70 °C
Ambient Air Temperature for Storage -50…85 °C
Relative Humidity 0…95%
Operating Altitude 0...2000 m without derating, 2000 m...5000 m with derating
Pollution Degree 3 conforming to IEC 60664-1
Sustainable Offer Status Green Premium product
Compliance EU RoHS Directive Compliant, Mercury free, Halogen free plastic parts product

The Telemecanique ComPacT NSX400S DC Circuit Breaker is a robust and reliable solution for electrical distribution applications. Designed to handle a rated current of 400 A at 40 °C and a rated operational voltage of 750 V DC, this circuit breaker ensures optimal performance and safety. It features a thermal-magnetic trip unit for effective overload and short-circuit protection. With a fixed mounting mode and backplate support, it is easy to install in various configurations. The NSX400S is compliant with international standards, including EN/IEC 60947, and offers a high degree of protection with IP40 and IK07 ratings. Its sustainable design aligns with Green Premium product standards, making it an environmentally friendly choice for modern electrical systems.

The Telemecanique NSX400S is a robust and reliable circuit breaker designed for efficient electrical distribution and protection in industrial applications. This compact device is part of the ComPacT NSX DC range, offering a high breaking capacity of 100 kA at 750 V DC, making it suitable for demanding environments. With a rated current of 400 A at 40°C, the NSX400S ensures optimal performance and safety. It features a thermal-magnetic trip unit, providing both overload and short-circuit protection. The circuit breaker is designed for fixed mounting on a backplate, with front connections for both upside and downside configurations. Its durable construction supports mechanical durability of up to 5000 cycles and electrical durability of 1000 cycles at full load. Conforming to international standards such as IEC 60947-2, the NSX400S is a versatile choice for DC network applications, ensuring reliable operation and protection.

Commonly Asked Questions

Is my order covered by a warranty?

Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.

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What payment methods do you accept?

We accept card payments from all major credit, debit and Mastercard providers including Visa, American Express, Western Union, Paypal and bank transfers. Before you complete an order you will be prompted to input your payment details, at which point you can enter the relevant card information you wish to use for your transaction. If you are experiencing issues with your payment method then you can contact our team via email here. From there, you will be directed to the most relevant resource or person to help you complete your payment, get your order processed and ensure that your parts are on the way to your delivery address.

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Is Marvo a credible parts supplier?

Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.

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Have steps been taken to ensure quality control?

Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.

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Creating an account is incredibly simple and takes a matter of seconds. You can create a Marvo account at any time by clicking here and following the simple steps on screen. By creating a Marvo account you can store your contact details, delivery addresses, billing addresses and more, meaning that you can enjoy game-changing convenience faster than ever before.

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Frequently Asked Questions

What is the primary function of this circuit breaker?

The Telemecanique NSX400S circuit breaker is designed for distribution applications, providing protection against overloads and short circuits.

What is the rated current capacity of this circuit breaker?

The circuit breaker has a rated current capacity of 400 A at 40°C.

Can this circuit breaker be used for isolation purposes?

Yes, the Telemecanique NSX400S is suitable for isolation, conforming to EN/IEC 60947-2 standards.

What is the breaking capacity of this circuit breaker?

The NSX400S has a breaking capacity of 100 kA at 380/415 V AC 50/60 Hz.

What type of protection does this circuit breaker offer?

This circuit breaker provides thermal protection for overloads and magnetic protection for short circuits.

What are the dimensions of the Telemecanique NSX400S?

The dimensions are 185 mm in width, 255 mm in height, and 110 mm in depth.

What is the environmental operating temperature range for this circuit breaker?

The operating temperature range is from -25°C to 70°C.

How many poles does this circuit breaker have?

The Telemecanique NSX400S circuit breaker is a 3-pole device.

What is the degree of protection provided by this circuit breaker?

The circuit breaker has an IP40 degree of protection, conforming to IEC 60529.

Is the Telemecanique NSX400S compliant with RoHS regulations?

Yes, the NSX400S is compliant with the EU RoHS Directive.

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Part conditions explained


We want your buying experience to be as seamless as possible. So, here are all of the product descriptions you will see when browsing Marvo, explained a little further:

New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.

New sealed: The product is sealed in its original packaging. It has never been opened or used, ensuring that it's in an untouched state.

New unboxed: The product does not come in its original packaging, but it has never been used and is in great working condition.

Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.

Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.

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