Eaton MPSC403WEAXX2Q Magnum LV Circuit Breaker - 100 kAIC

Part Number: MPSC403WEAXX2Q
MPSC403WEAXX2Q
Manufacturer
Eaton
Part number
MPSC403WEAXX2Q
Category

Quick Summary

The Eaton Magnum low voltage power circuit breaker protects power distribution with precise tripping in demanding industrial environments. Engineers often struggle with nuisance trips, limited protection coordination, and lengthy commissioning times that raise downtime and costs. This model carries UL Listed, CE Marked, and CSA Certified credentials, supporting global compliance and easy supplier qualification. Coupled with a Power Xpert Release PXR trip unit and a 4000 A Iu rating, it delivers scalable protection for large MCCs. For project teams, this combination reduces downtime, simplifies maintenance, and aligns with modern digital protection strategies.

Product Information

Extended Description

MPSC403WEAXX2Q Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 4000 A (ABCABC), 100 kA, Three-pole, Drawout vertical mounting, PXR25 LSIAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPSC403WEAXX2Q
UPC
786689635213
Product Length/Depth
16.3 in
Product Height
16.8 in
Product Width
31.1 in
Product Weight
237 lb
Compliances
CE Marked SABA Listed NEMA Compliant CCC Marked
Certifications
CSA Certified KEMA Certified Lloyd's Register Certified UL Listed ANSI ABS Certified DNV GL Certified
Frame
Double standard
Number of poles
Three-pole
Type
Magnum PXR
Frame
Double standard
Series
Magnum
Trip Type
PXR25 LSI ARMS
Number of poles
Three-pole
Rated uninterrupted current (Iu)
4000 A
Interrupt rating
100 kAIC
Interrupt rating
100 kAIC
Rated uninterrupted current (Iu)
4000 A
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 Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx Circuit Protection, Power Breakers, Contactors and Fuses, Volume 4, Tab 3 Power Xpert Protection Manager x64 22.6 1 Power Xpert Protection Manager x64 22.6 1 Eaton Specification Sheet - MPSC403WEAXX2Q Eaton Specification Sheet - MPSC403WEAXX2Q 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: Magnum PXR trip unit with LS I ARMS provides advanced protection coordination and arc energy management. Business Impact: Enhances selective tripping and reduces arc flash exposure, lowering safety risk and improving uptime. Application: Ideal for motor control centers and critical feeders in manufacturing and data centers. Feature: 4000 A Iu and 100 kAIC interrupt rating offer robust protection for high-demand loads. Business Impact: Minimizes fault energy transfer, protects feeders and motors, and reduces equipment damage costs. Application: Large-scale MCCs, processing lines, and heavy industrial installations. Feature: Drawout vertical mounting with a three-pole, double standard frame design enables quick swaps and modular upgrades. Business Impact: Cuts maintenance time and simplifies panel retrofits, reducing downtime during upgrades. Application: Control panels and switchgear in evolving industrial plants. Feature: Comprehensive certifications and standards support global deployments. Business Impact: Reduces qualification cycles and compliance risk across regions. Application: multinational manufacturing sites and international facilities. Feature: Rich technical resources streamline commissioning and service. Business Impact: Accelerates start-up, improves first-run performance, and lowers commissioning costs. Application: Engineering teams performing site validation and preventive maintenance.

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FAQs

The MPSC403WEAXX2Q supports drawout vertical mounting with a three-pole configuration in a double standard frame. Its compact footprint aligns with standard MCC and switchgear panels, while the 16.3 in depth, 16.8 in height, and 31.1 in width facilitate mechanical planning and enclosure compatibility. This design enables straightforward maintenance and fast breaker replacement without major panel rewiring.
Key ratings include rated uninterrupted current (Iu) of 4000 A and an interrupt rating of 100 kAIC, supporting high-demand feeders and motor protection. It uses a Magnum PXR trip unit (LSI ARMS) for precise tripping logic, and it operates as a three-pole device with drawout vertical mounting, suitable for large industrial installations.
This model is UL Listed, CE Marked, and CSA Certified, with additional listings and compliance across ANSI, ABS, DNV GL, and SABA where applicable. It also shows NEMA compliance and CCC marking, ensuring global applicability and regulatory alignment for multinational projects and supplier qualifications.
The PXR25 LSI ARMS trip unit provides fast, localized sensing and arc-energy management to improve selective coordination. This reduces arc-flash risk, shortens fault clearance times, and enhances protection accuracy across feeders and main circuits. For engineers, it enables more precise protection schemes and easier tuning in complex electrical distributions.
A range of Eaton resources supports installation and commissioning, including the Magnum PXR product aid, time/current curves, application papers such as ZSI (zone selective interlocking), and detailed specification sheets. These documents aid engineering teams in selecting the correct options, validating coordination, and accelerating startup while reducing misconfigurations.