Eaton MPSC404WEAXX2S Magnum LV Circuit Breaker - UL Listed
Part Number: MPSC404WEAXX2S
Quick Summary
Eaton Magnum low voltage power circuit breaker protects electrical distribution in industrial installations, delivering reliable overcurrent protection for MCCs and panel boards. In practice, engineers confront nuisance trips, miscoordination, and downtime when protection isn’t tuned to the load. This model’s Power Xpert Release trip unit and drawout vertical mounting enable precise coordination and fast fault clearance. It carries UL Listed, CE Marked, and CSA Certified approvals, supporting global panel builds and cross-border compliance. By combining rugged protection with built-in diagnostics and service-friendly renewal options, it delivers measurable business value: fewer outages, lower maintenance costs, and easier spare parts planning across manufacturing, mining, and process industries. Secondary keywords: selective coordination, high-current protection, and modular protection solutions.
Product Information
Extended Description
MPSC404WEAXX2S Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 4000 A (NNABCABC), 100 kA, Four-pole, Drawout vertical mounting, PXR25 LSIGAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPSC404WEAXX2S
UPC
786689633820
Product Length/Depth
16.3 in
Product Height
16.8 in
Product Width
44.1 in
Product Weight
319 lb
Compliances
CCC Marked NEMA Compliant CE Marked SABA Listed
Certifications
Lloyd's Register Certified ANSI KEMA Certified CSA Certified UL Listed ABS Certified DNV GL Certified
Zone selective interlocking application paper
Magnum circuit breakers with Power Xpert Release trip units product aid
Selevctive coordination application paper - IA0120000E3
Magnum PXR and PD-SB double and double narrow frame UL Certificate of Compliance
Magnum PXR and PD-SB double and double narrow frame UL Certificate of Compliance
Magnum PXR low voltage power circuit breakers user manual
Magnum PXR low voltage power circuit breakers user manual
Magnum PXR low voltage power circuit breakers user manual
Circuit Protection, Power Breakers, Contactors and Fuses, Volume 4, Tab 3
Power Xpert Protection Manager x32 22.06 1
Power Xpert Protection Manager x32 22.06 1
Eaton Specification Sheet - MPSC404WEAXX2S
Eaton Specification Sheet - MPSC404WEAXX2S
Magnum low-voltage power circuit breakers (ANSI and IEC) renewal parts and accessories
Magnum PXR 20/25 electronic trip units time current curves
Molded case and low-voltage power circuit breaker health
Molded case and low-voltage power circuit breaker health
Molded case and low-voltage power circuit breaker health
Feature: Power Xpert Release (PXR) trip unit with LSIGAM configuration. Business Impact: enables precise selective coordination and rapid fault isolation, reducing arc energy exposure and improving system uptime. Application: ideal for motor feeders, cross-cutting distribution panels, and process plant lines where downtime costs are high. Feature: 4000 A frame with 100 kA short-circuit rating. Business Impact: withstands high fault currents without escalating protection events, protecting downstream equipment and cables. Application: suitable for heavy-duty industrial feeders, data centers, and electrical rooms with elevated fault levels. Feature: Four-pole construction with drawout vertical mounting. Business Impact: simplifies installation, testing, and maintenance, lowering labor costs and downtime during maintenance windows. Application: used in large switchgear assemblies, MCCs, and control panels requiring robust phase isolation. Feature: Comprehensive certifications (UL Listed, CE Marked, CSA Certified, ANSI, KEMA). Business Impact: supports global deployments, simplifies procurement, and reduces compliance risk across multinational sites. Application: enables cross-border projects, panel shops, and OEM builds. Feature: Compatibility with renewal parts and accessories for Magnum PXR breakers. Business Impact: extends lifecycle, reduces total cost of ownership, and ensures ongoing performance. Application: maintenance planning, parts stocking, and retrofit projects across industrial facilities.
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FAQs
The MPSC404WEAXX2S uses a drawout vertical mounting and a four-pole construction, which simplifies retrofits and new panel installs. Ensure compatible bus ratings, proper clearance for withdrawal, and correct torque on terminations. The Power Xpert Release trip unit requires compatible wiring and accessory installation per the user manual to maintain coordination and reliability.
The unit ships with a Power Xpert Release trip unit (PXR) and LSIGAM configuration that enables precise coordination between upstream and downstream protective devices. This reduces the likelihood of unnecessary trips, confines fault clearing to the smallest possible segment, and minimizes downtime in feeders and large motor circuits.
This breaker is UL Listed, CE Marked, and CSA Certified, with additional ANSI and KEMA/Lloyd’s Register endorsements reflected in its certification portfolio. These approvals support global manufacturing, cross-border panel builds, and compliance with regional electrical codes and safety standards.
Eaton provides renewal parts and accessories for Magnum PXR units, including trip units, replacement contact sets, and repair kits. Regular inspection of the LSIGAM trip unit, contact wear, and actuator assemblies, coupled with available renewal parts, helps sustain protection performance and reduces long-term lifecycle costs.
Key specs include a four-pole arrangement, 4000 A frame capacity, 100 kA short-circuit rating, drawout vertical mounting, and the Power Xpert Release trip unit. These factors influence panel space, installation tooling, fault-current handling, and maintenance planning, guiding cost estimates for aggressive protection schemes.