Eaton MPSC4N4WEAXXSW Magnum low voltage circuit breaker - 100 kAIC
Part Number: MPSC503HEAXX2A
Quick Summary
The Eaton Magnum low voltage power circuit breaker MPSC4N4WEAXXSW protects high-current distribution in industrial facilities. This four-pole, drawout unit helps minimize downtime by enabling fast replacement and straightforward maintenance in harsh environments. The product carries multiple critical certifications, including UL Listed, CE Marked, and CSA Certified, with additional NEMA compliance and other global approvals that simplify procurement across regions. As a no-trip-unit base for Magnum PXR installations, it offers flexible protection options when paired with external trip units, enabling scalable protection schemes for evolving infrastructures. For engineers and procurement teams, the combination of a robust 4000 A Iu rating and 100 kAIC interrupt capability translates to reliable performance, reduced arc-flash risk, and streamlined panel modernization.
Product Information
Extended Description
MPSC503HEAXX2A Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 5000 A (ABCABC), 100 kA, Three-pole, Fixed horizontal mounting, PXR20 LSI trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPSC503HEAXX2A
UPC
786689634964
Product Length/Depth
16.3 in
Product Height
16.8 in
Product Width
31.1 in
Product Weight
237 lb
Compliances
CCC Marked NEMA Compliant CE Marked SABA Listed
Certifications
KEMA Certified Lloyd's Register Certified CSA Certified ANSI UL Listed DNV GL Certified ABS Certified
Frame
Double standard
Number of poles
Three-pole
Type
Magnum PXR
Frame
Double standard
Series
Magnum
Trip Type
PXR20 LSI
Number of poles
Three-pole
Rated uninterrupted current (Iu)
5000 A
Interrupt rating
100 kAIC
Interrupt rating
100 kAIC
Rated uninterrupted current (Iu)
5000 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 x32 22.06 1
Power Xpert Protection Manager x32 22.06 1
Eaton Specification Sheet - MPSC503HEAXX2A
Eaton Specification Sheet - MPSC503HEAXX2A
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: Four-pole Magnum PXR frame with a 4000 A rated uninterrupted current (Iu) and 100 kAIC interrupt rating. Business Impact: Supports high-demand distribution with robust short-circuit capability, improving system reliability and safety. Application: Ideal for industrial panels and process facilities where heavy load switching occurs and downtime must be minimized. Feature: Drawout vertical mounting with a double standard frame. Business Impact: Facilitates quick replacement and easier maintenance in tight or retrofit panel spaces, reducing labor time and risk during outages. Application: Panelboards and switchgear retrofits in manufacturing lines and data centers. Feature: No trip unit installed by default, with compatibility to Magnum PXR protection options. Business Impact: Provides installation flexibility and future-proofing, enabling upgrade paths as protection strategy evolves. Application: Systems planning for evolving protection architectures in critical infrastructure. Feature: Extensive certifications including UL Listed, CE Marked, CSA Certified, and additional global approvals. Business Impact: Reduces procurement risk, accelerates regulatory clearance, and supports multi-region deployments. Application: Global manufacturing campuses and multinational facilities with strict compliance needs. Feature: Delivery program and series alignment with Magnum family for seamless integration. Business Impact: Streamlines specification, ensures compatibility with existing Magnum accessories, and simplifies sourcing. Application: New installations and panel upgrades where standardization across equipment reduces total cost of ownership.
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FAQs
The MPSC4N4WEAXXSW is a four-pole Magnum base designed for standard drawout panelboard installations with vertical mounting. It supports the double-frame configuration and accepts Magnum PXR protection accessories where applicable. For retrofit projects, confirm frame size, mounting rails, and connector alignment per Eaton installation guides to ensure seamless compatibility.
This model provides a rated uninterrupted current (Iu) of 4000 A and an interrupt rating of 100 kAIC. With four poles and a drawout design, it delivers reliable fault interruption and straightforward maintenance procedures, aiding proper breaker coordination with upstream and downstream devices in high-demand distributions.
Yes. The MPSC4N4WEAXXSW is UL Listed and CE Marked, with CSA Certification among other approvals. These certifications support regulatory compliance across regions, streamline audits, and reduce panel qualification time for global deployments.
This model is supplied as a base with no trip unit by default, but it is designed to accept Magnum PXR trip units when used within compatible configurations. For protection coordination, pair with PXr trip units according to Eaton's installation manuals and verify version compatibility with your frame and poles.
Choosing this breaker delivers high-current protection (4000 A Iu, 100 kAIC) in a durable four-pole, drawout frame with easy maintenance. Certifications reduce regulatory risk, while modular upgrades and panel retrofits lower lifecycle costs and extend equipment life, contributing to lower downtime and higher system availability in critical facilities.