Eaton MPSC123HEAXX2F Magnum PXR Breaker - UL Listed
Part Number: MPSC123HEAXX2F
Quick Summary
Eaton Magnum low voltage power circuit breaker provides reliable overcurrent protection for industrial power distribution. Design teams often struggle with panel-to-panel coordination, causing downtime when protection is not selective. This model uses a PXR20 LSIG ARMS trip unit and a three-pole standard-frame design to improve selectivity and fault clearance. It carries UL Listed, CSA Certified, and Lloyd’s Register certifications, along with CE Marked, NEMA Compliant, and other global approvals to support worldwide deployment. Coupled with an Iu rating of 1200 A and an interrupt rating of 100 kAIC, the unit integrates with Power Xpert Release trip units and existing switchgear, delivering robust protection with predictable maintenance costs across critical processes.
Product Information
Extended Description
MPSC123HEAXX2F Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Standard frame, 1200 A, 100 kA, Three-pole, Fixed horizontal mounting, PXR20 LSIGAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPSC123HEAXX2F
UPC
786689638160
Product Length/Depth
14.6 in
Product Height
16.8 in
Product Width
16.2 in
Product Weight
118 lb
Compliances
CE Marked NEMA Compliant SABA Listed CCC Marked
Certifications
Lloyd's Register Certified CSA Certified UL Listed ANSI KEMA Certified DNV GL Certified ABS 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
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 - MPSC123HEAXX2F
Eaton Specification Sheet - MPSC123HEAXX2F
Magnum low-voltage power circuit breakers (ANSI and IEC) renewal parts and accessories
Magnum PXR 20/25 electronic trip units time current curves
Cyber security white paper
Cyber security white paper
Cyber security white paper
High current capability and robust protection are provided by 1200 A rated uninterrupted current (Iu) and a 100 kAIC interrupt rating, enabling reliable safeguarding of large feeders and motors in distribution panels and motor control centers. This translates to fewer nuisance trips during startup surges and faster fault clearance, reducing downtime in demanding applications. The three-pole, standard-frame design with fixed horizontal mounting simplifies retrofits and longitudinal integration with existing enclosures, bus systems, and control wiring, minimizing installation time and total cost of ownership. The PXR20 LSIG ARMS trip unit delivers integrated protection with improved selectivity, helping you implement precise coordination schemes and safer startup/shutdown sequences for critical processes. Certifications and compliances (UL Listed, ANSI, CSA, Lloyd’s Register, CE Marked, NEMA, SABA, CCC) support global procurement and cross-border projects, while the compact physical footprint (14.6 in depth, 16.8 in height, 16.2 in width) and 118 lb weight ease handling and space planning in tight switchgear rooms. In practice, this means quicker commissioning, lower inventory complexity, and dependable performance in power distribution, MCCs, and process industries.
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FAQs
The MPSC123HEAXX2F uses a standard frame and fixed horizontal mounting, designed for straightforward retrofit and seamless integration with conventional switchgear and busbar layouts. Its three-pole configuration fits common distribution panels and motor control centers, reducing field modification needs and accelerating deployment across new builds or upgrades.
This breaker delivers 1200 A rated uninterrupted current (Iu) and 100 kAIC interrupt rating, enabling robust protection for large feeders and motor loads. The PXR20 LSIG ARMS trip unit provides integrated protection with selective coordination, helping to minimize outages and ensure safe, reliable operation under fault conditions.
Yes. With a three-pole, standard-frame design and high interrupt reliability, the Magnum PXR unit is well suited for MCC applications. Its compatibility with Power Xpert Release trip units and robust protection ratings supports motor protection, startup integrity, and safe shut-down sequences in demanding industrial environments.
The unit carries UL Listed, ANSI, CSA certifications, plus Lloyd’s Register recognition. It also includes CE Marked, NEMA Compliant, SABA Listed, and CCC Marked compliances. This broad certification portfolio supports global procurement, regulatory compliance, and cross-border installation in multinational facilities.
The PXR20 LSIG ARMS trip unit provides advanced protection with improved selectivity, reducing nuisance trips and enabling precise fault isolation. Installation benefits include easier integration with existing Power Xpert protection systems, compatibility with standard framing, and straightforward field wiring within typical switchgear configurations, helping shorten commissioning time and improve system reliability.