Square D MX Shunt Trip Voltage...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$627.66
Square D MX Shunt Trip Voltage Release for ComPacT NSXm

Square D MX Shunt Trip Voltage Release for ComPacT NSXm

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Model: LV426841

In Stock (leaves warehouse same day if ordered before 3pm ET)

$627.66
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Square D MX Shunt Trip Voltage Release for ComPacT NSXm

The Square D MX shunt trip voltage release is a pre-wired auxiliary trip unit for ComPacT NSXm and PowerPact B circuit breakers, providing emergency-off or failsafe remote opening. Rated for 125VDC or 110...130VAC 50/60Hz control circuit voltage, this one-click spring-type auxiliary mounts to the breaker front for quick installation and is pre-wired with 0-0.8 mm² (AWG 18) stranded copper leads for fast termination, tripping at 0.7 Un with a response time of < 50 ms.

Key Features

  • Range Compatibility: Designed for ComPacT NSXm and PowerPact B circuit breakers.
  • Control Circuit Voltage: Operates at 125VDC or 110...130VAC 50/60Hz for flexible control power options.
  • Control Signal Type: Accepts maintained or impulse control signals.
  • Voltage Release Type: Functions as an opening coil / shunt trip release for emergency-off and failsafe remote opening applications.
  • Threshold Tripping Voltage: Trips at 0.7 Un opening for reliable actuation.
  • Auxiliary Connection Terminal: Pre-wired 0-0.8 mm² (AWG 18) stranded copper leads for quick, secure termination.
  • Response Time: Fast response time of < 50 ms supports critical safety circuits.
  • Installation: One-click spring-type auxiliary, visible from the front for quick, easy installation.

Certifications & Compliance

  • RoHS EU Compliant with Exemptions
  • Mercury Free
  • Sustainable Packaging with Recycled Cardboard, No Single-Use Plastic

Technical Specifications

  • Voltage Rating: 125VDC / 110-130VAC
  • Response Time: < 50 ms
  • Country of Origin: France

Typical Applications

  • Emergency-Off (E-Stop) Remote Tripping Circuits
  • Failsafe Remote Opening of Circuit Breakers
  • Industrial and Commercial Switchgear
  • Panelboard and Motor Control Center Integration
  • Retrofit Auxiliary Addition to ComPacT NSXm and PowerPact B Breakers

Why Square D?

Square D engineers this MX shunt trip release with RoHS-compliant, mercury-free construction and recycled-content packaging for dependable performance in critical safety circuits. Its fast < 50 ms response time and proven pre-wired, one-click spring-type design deliver reliable remote opening for ComPacT NSXm and PowerPact B breakers in demanding industrial and commercial electrical systems.

Manufacturer Resources

Product Specs

Product Type:
Shunt Trip & Auxiliary Contact
Voltage Rating:
125VDC / 110-130VAC
Country of Origin:
France
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers

Square D LV426841 – Frequently Asked Questions

1) Will the Square D MX shunt trip release fit a ComPacT NSXm breaker?
Yes. The MX shunt trip voltage release is built for ComPacT NSXm and PowerPact B circuit breakers. It mounts to the breaker front as a one-click spring-type auxiliary, so it can be added to a breaker already installed in a panel without replacing the breaker.
2) What control voltages does the MX shunt trip release come in?
Two coil ratings are offered. LV426841 is the 24VAC / 24VDC version, and LV426843 covers 110-130VAC 50/60Hz or 125VDC. Pick the one that matches the control power feeding your E-stop or fire alarm relay contact, not the breaker's line voltage.
3) What is the difference between LV426843 and LV426863?
Both are the 110-130VAC / 125VDC coil. LV426863 is the pre-wired version, supplied with 0-0.8 mm2 (AWG 18) stranded copper leads ready to terminate, while LV426843 is the standard build. If you want to land flying leads straight into a terminal block instead of wiring to the auxiliary terminals, order the pre-wired one.
4) How fast does this shunt trip open the breaker, and will it work for an E-stop circuit?
Response time is under 50 ms, which is why this MX release is used in emergency-off (E-stop) and failsafe remote opening circuits. It trips at 0.7 Un, so it still actuates on a sagging control signal rather than waiting for full nominal voltage.
5) Can I drive the MX release with a momentary pushbutton, or does the signal have to be held?
Either works. The MX voltage release accepts maintained or impulse control signals, so a momentary E-stop pushbutton or a held relay contact will both trip the breaker.
6) Is this a shunt trip or an undervoltage release?
It is a shunt trip, also called an opening coil. The coil is energized to open the breaker. An undervoltage (UVR) release is the opposite logic, opening when control power is lost, so if your design calls for the breaker to drop out on loss of voltage this is not the accessory you want.
7) Can I add this shunt trip to breakers already in service in a panelboard?
Yes, that is a stated use: retrofit auxiliary addition to ComPacT NSXm and PowerPact B breakers. It mounts on the breaker front and is visible from the front, so a maintenance electrician can install and verify it in place. Standard practice is to de-energize the breaker before fitting the accessory.
8) What wire size do the pre-wired leads take for terminating in a control panel?
The auxiliary connection is pre-wired with 0-0.8 mm2 stranded copper, which is AWG 18. Size your terminal block or wire nuts accordingly; no separate pigtail is needed on the pre-wired version.
9) Is the Square D MX shunt trip RoHS compliant, and where is it made?
It is RoHS EU compliant with exemptions and mercury free, and it ships in recycled cardboard with no single-use plastic. Country of origin is France, which is the detail most institutional and government buyers need for submittals.
How fast can I get the Square D LV426841 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D LV426841 come with a warranty?
Absolutely. The Square D LV426841 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D LV426841?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Square D LV426841 from ZenSupply?
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