Eaton MPS8403HEAXX2H Magnum LV Circuit Breaker - UL

MPS8403HEAXX2H
Manufacturer
Eaton
Part number
MPS8403HEAXX2H
Category

Quick Summary

The Eaton Magnum low voltage power circuit breaker MPS8403HEAXX2H is a high-capacity protection device for industrial power distribution. Engineers struggle with coordination, downtime, and arc-flash risk; this breaker helps by precise trip control and reliable fault isolation. With CE Marked, UL Listed, and CSA Certified, plus KEMA Certified and Lloyd’s Register certifications, it supports global compliance for diverse facilities. Additionally, its compatibility with Power Xpert Release PX R trip units and fixed horizontal mounting streamlines installation and maintenance. For panel builders and maintenance teams, the 4000 A frame and 85 kA short-circuit rating translate into fewer devices in larger assemblies and lower lifecycle costs.

Product Information

Extended Description

MPS8403HEAXX2H Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 4000 A (ABCABC), 85 kA, Three-pole, Fixed horizontal mounting, PXR20 LSIAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPS8403HEAXX2H
UPC
786689628383
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 ANSI UL Listed Lloyd's Register Certified CSA 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 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 - MPS8403HEAXX2H Eaton Specification Sheet - MPS8403HEAXX2H 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-capacity frame and robust fault tolerance provide a solid backbone for large power distribution schemes, reducing the number of devices needed and lowering BOM complexity. This translates into lower installation time, simplified maintenance, and improved overall system reliability in manufacturing plants and data centers. The Magnum PXR20 LSIAM trip unit delivers precise protection coordination, enabling faster fault isolation and reduced arc-flash exposure for personnel while preserving essential downstream loads. The three-pole design with fixed horizontal mounting supports consistent phasing and predictable installation across panels, enabling repeatable assembly practices and easier field retrofits. Compatibility with Power Xpert Protection Manager (PXPM) and PX R trip unit ecosystems allows centralized configuration, monitoring, and proactive protection, cutting commissioning time and enabling smarter asset management. Zone selective interlocking options and renewal parts compatibility further reduce downtime during maintenance cycles and parts obsolescence.

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FAQs

The MPS8403HEAXX2H uses a fixed horizontal mounting arrangement and a double standard frame, which simplifies retrofits into existing Magnum installations. Verify panel clearance, ensure proper bus alignment, and use the PXR20 LSIAM trip unit for compatible protection coordination. The unit integrates with common Power Xpert Protection Manager workflows to streamline configuration and commissioning.
This breaker is rated for up to 4000 A with an 85 kA short-circuit capability and features a three-pole configuration. It utilizes the Magnum PXR20 LSIAM trip unit, enabling precise protection and coordination in industrial power circuits while supporting zone selective interlocking options where installed.
Yes. The combination of high current rating, strong fault withstand, and PXR trip-unit capabilities makes it well-suited for data centers, manufacturing lines, and other critical power distribution applications where uptime and selective coordination are essential. Its mounting and compatibility features reduce installation time and enable scalable protection architectures.
This model is CE Marked and UL Listed, with CSA Certification and additional third-party verifications such as KEMA and Lloyd’s Register where applicable. This certification suite supports global deployment across facilities with varying regulatory requirements and procurement standards.
PX R trip-unit compatibility enables centralized monitoring, easier firmware updates, and simpler protection tuning, which minimizes field trips and unplanned downtime. Over its lifecycle, this reduces maintenance costs, extends service intervals, and delivers faster fault diagnosis, improving total cost of ownership in large electrical distributions.