Eaton MPS8403HEAXX2C Magnum LV circuit breaker - PXR20 LSIG

MPS8403HEAXX2C
Manufacturer
Eaton
Part number
MPS8403HEAXX2C
Category

Quick Summary

Eaton Magnum low voltage power circuit breaker delivers reliable overcurrent protection for industrial and commercial electrical systems. In busy plants, nuisance trips and delayed protection responses drive unplanned downtime and costly maintenance. CE Marked, UL Listed, and CSA Certified ensure global compliance and safer operation across markets. Featuring a PXR20 LSIG trip unit and three-pole, fixed-horizontal mounting, it supports reliable protection coordination and lower lifecycle costs. This combination is well suited for demanding applications in motors, conveyors, and process lines, where fast, predictable tripping and clear diagnostic data matter. As interest grows in selective coordination, the PXR20 LSIG unit makes alignment easier and reduces nuisance trips.

Product Information

Extended Description

MPS8403HEAXX2C Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 4000 A (ABCABC), 85 kA, Three-pole, Fixed horizontal mounting, PXR20 LSIG trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPS8403HEAXX2C
UPC
786689628369
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
ANSI Lloyd's Register Certified UL Listed CSA Certified KEMA Certified DNV GL Certified ABS 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 Power Xpert Release trip unit for Magnum PXR circuit breakers PXR 20/25 user manual Power Xpert Release trip unit for Magnum PXR circuit breakers PXR 20/25 user manual Power Xpert Release trip unit for Magnum PXR circuit breakers PXR 20/25 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 - MPS8403HEAXX2C Eaton Specification Sheet - MPS8403HEAXX2C 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 interrupting capacity and rugged construction are hallmarks of the MPS8403HEAXX2C. The unit carries an 85 kA short-circuit rating and a 4000 A frame capacity, enabling reliable interruption of large faults without additional hardware changes. This translates into reduced transformer stress, fewer panel faults, and shorter outage durations for critical feeders. In high-demand environments such as motor drives and material-handling lines, the breaker maintains system integrity during startup surges and fault events, supporting uptime and safer emergency responses. Trip unit versatility with PXR20 LSIG provides configurable protection functions and arc-energy management, improving selective coordination with downstream devices and enabling easier commissioning via Power Xpert tools. The three-pole, fixed-horizontal mounting aligns with standard Magnum frames, enabling straightforward integration into existing enclosures and bus systems. Dimensions (16.3 in depth, 16.8 in height, 31.1 in width) and a 237 lb weight facilitate planning for installation and service accessibility. Certification coverage including UL Listed and CE Marked simplifies global deployment and regulatory compliance. Renewal parts and accessories, manuals, and time-current curves are available to support ongoing maintenance and lifecycle optimization.

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FAQs

The MPS8403HEAXX2C uses a three-pole design with fixed horizontal mounting, compatible with standard Magnum frames and common panel enclosures. This setup simplifies installation, supports consistent bus connections, and enables straightforward maintenance in industrial switchgear and control panels.
This breaker features an 85 kA short-circuit rating with a 4000 A frame and a PXR20 LSIG trip unit. These specifications support robust fault interruption for large motors and feeders, while the LSIG trip unit provides adjustable, reliable protection parameters and arc-energy management for safer operation.
Yes. The MPS8403HEAXX2C is UL Listed and CE Marked, along with CSA Certified. These certifications reassure compliance with global safety standards, streamline cross-border installations, and support customers deploying systems across multiple regions.
Eaton offers Magnum renewal parts and accessories, alongside manuals, user guides, and time-current curves. These resources support ongoing maintenance, easy part replacement, and informed upgrades to preserve protection performance over the system lifecycle.
Industrial motor drives, conveyors, and process line feeders benefit from the high interrupting capacity, PXR20 LSIG protection, and selective coordination. The combination delivers improved uptime, reduced nuisance trips, and easier commissioning in environments demanding reliable, regulated protection with robust diagnostics.