Eaton MPSC123WEAXX2F Magnum LV Circuit Breaker - 100 kAIC

Part Number: MPSC123WEAXX2F
MPSC123WEAXX2F
Manufacturer
Eaton
Part number
MPSC123WEAXX2F
Category

Quick Summary

Eaton Magnum low voltage power circuit breaker provides reliable overcurrent protection for electrical distribution panels and switchgear. Engineers often struggle with arc-flash risk, downtime, and maintenance costs when coordinating protection for expanding systems. This unit is UL Listed, CE Marked, and NEMA Compliant, with additional KEMA and CSA certifications supporting global install base and regulatory compliance. Designed for easy integration and long-term reliability, it delivers robust protection while simplifying maintenance planning and spare-part strategies across industrial facilities and data centers.

Product Information

Extended Description

MPSC123WEAXX2F Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Standard frame, 1200 A, 100 kA, Three-pole, Drawout vertical mounting, PXR20 LSIGAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPSC123WEAXX2F
UPC
786689638979
Product Length/Depth
14.6 in
Product Height
16.8 in
Product Width
16.2 in
Product Weight
118 lb
Compliances
SABA Listed CE Marked NEMA Compliant CCC Marked
Certifications
UL Listed KEMA Certified CSA Certified Lloyd's Register Certified ANSI ABS Certified DNV GL Certified
Frame
Standard
Number of poles
Three-pole
Type
Magnum PXR
Frame
Standard
Series
Magnum
Trip Type
PXR20 LSIG ARMS
Number of poles
Three-pole
Rated uninterrupted current (Iu)
1200 A
Interrupt rating
100 kAIC
Interrupt rating
100 kAIC
Rated uninterrupted current (Iu)
1200 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 - MPSC123WEAXX2F Eaton Specification Sheet - MPSC123WEAXX2F 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
Three-pole Magnum PXR trip unit with LSIG arms provides precise protection coordination, reducing nuisance trips and enabling faster fault clearance with improved arc-flash mitigation. This translates to lower downtime, safer operations, and simplified maintenance scheduling in high-demand production lines and process facilities. The standard frame and drawout vertical mounting support straightforward retrofits and upgrades in existing switchgear, shortening project timelines and minimizing upgrade costs. The 1200 A Iu rating handles large loads with confidence, while the 100 kAIC interrupt rating withstands high-energy faults, reducing cascade failures and extending equipment life in heavy industrial applications. UL Listed, CSA Certified, and CE Marked with additional certifications from KEMA, Lloyd’s Register, and NEMA ensure global acceptance and regulatory alignment for multinational projects. Compatibility with Magnum family trip units and Power Xpert Protection Manager enables scalable protection schemes and centralized firmware updates, delivering improved asset management and ROI across distributed systems.

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FAQs

The MPSC123WEAXX2F uses a Magnum PXR trip unit with LSIG arms, enabling precise protection coordination for three-pole configurations. This supports selective tripping and faster fault isolation, improving system reliability and reducing unplanned downtime in complex distribution schemes.
Yes. It is a three-pole, three-phase device designed for 3-phase systems, with a standard frame and drawout vertical mounting that simplifies installation, testing, and future maintenance in panelboards and switchgear without extensive rework.
This breaker is UL Listed and CSA Certified, CE Marked, and also carries KEMA, Lloyd’s Register, ANSI, ABS certifications, plus NEMA compliance. These certifications support regulatory acceptance and safe operation across North America, Europe, and other global markets.
The unit features a 14.6 inch depth, 16.2 inch width, and 16.8 inch height, with a weight of 118 lb. These dimensions support planning for cabinet space, mounting clearances, and alignment within existing switchgear or new installations.
Rated Iu is 1200 A with an interrupt rating of 100 kAIC. These ratings determine how much continuous current the breaker can carry without tripping and how much fault current it can interrupt safely, which is critical for selecting devices that meet system demands and reduce fault energy in critical applications.