Eaton MPS8403HEAXX2A Magnum breaker - UL Listed, 85 kA
Part Number: MPS8403HEAXX2A
Quick Summary
The Eaton MPS8403HEAXX2A Magnum low voltage power circuit breaker protects industrial power distribution by rapidly interrupting fault currents. Engineers often contend with nuisance trips and coordination challenges in large panels, which can drive downtime and maintenance costs. UL Listed, CE Marked, and NEMA Compliant certifications, along with KEMA certification, anchor regulatory alignment while the Power Xpert Release PXR20 trip unit enables selective coordination. This combination delivers safer operation, faster diagnostics, and smoother integration with the Power Xpert ecosystem, supporting efficient, compliant power distribution for manufacturing, process, and facility environments.
Product Information
Extended Description
MPS8403HEAXX2A Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 4000 A (ABCABC), 85 kA, Three-pole, Fixed horizontal mounting, PXR20 LSI trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPS8403HEAXX2A
UPC
786689628352
Product Length/Depth
16.3 in
Product Height
16.8 in
Product Width
31.1 in
Product Weight
237 lb
Compliances
NEMA Compliant CE Marked SABA Listed CCC Marked
Certifications
KEMA Certified UL Listed Lloyd's Register Certified ANSI CSA Certified ABS Certified DNV GL 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 - MPS8403HEAXX2A
Eaton Specification Sheet - MPS8403HEAXX2A
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
Feature: High interrupting capacity and robust frame design enables reliable protection for high-demand loads. Business Impact: Reduces downtime and equipment damage from short circuits, lowering maintenance costs and insurance exposure. Application: Motor feeders and critical loads in manufacturing lines where large fault currents might occur. Feature: PXR20 LSI trip unit provides advanced protection and selectable coordination. Business Impact: Minimizes nuisance trips, improves uptime, and simplifies fault root-cause analysis. Application: Panels with multiple breakers requiring precise coordination for safety and reliability. Feature: Fixed horizontal mounting with a double standard Magnum frame ensures compatibility with existing switchgear. Business Impact: Faster installation, reduced engineering time, and seamless retrofit into AS- or DIN-rail compatible layouts. Application: New builds and upgrades in process plants and packaging lines. Feature: 4000 A frame capability and 85 kA short-circuit rating deliver scalable protection. Business Impact: Supports high-power applications with confident short-circuit withstand, reducing risk and enabling compact panel design. Application: Large motor control centers and distribution panels. Feature: Comprehensive certifications including UL Listed, CE Marked, NEMA Compliant, and KEMA Certified. Business Impact: Eases procurement approvals and regulatory compliance, speeding project timelines. Application: Global deployments across automotive, packaging, and general manufacturing facilities. Feature: Power Xpert ecosystem compatibility including Protection Manager interfaces. Business Impact: Centralized alarm management, remote diagnostics, and easier maintenance planning. Application: Integrated plant-wide protection strategy in mid- to large-scale facilities.
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FAQs
Yes. The MPS8403HEAXX2A uses a fixed horizontal mounting arrangement within the Magnum frame, designed for straightforward integration into standard switchgear and existing bus systems. Its three-pole configuration and compatible bus interfaces support rapid retrofit without major enclosure modifications, reducing installation risk and downtime.
The device is a three-pole, 4000 A frame breaker with an 85 kA short-circuit rating (ABCABC). It features the Power Xpert Release PXR20 LSI trip unit for advanced protection, enabling selective coordination and fast, accurate tripping to protect feeders and motors while minimizing unnecessary outages.
Ideal for motor feeders, manufacturing lines, and process equipment protection, the MPS8403HEAXX2A supports high fault-current environments. Its 85 kA capability and selective coordination reduce downtime in critical production areas, while its robust construction suits harsh industrial settings and enables reliable panel protection.
This breaker carries UL Listed, CE Marked, and NEMA Compliant certifications, with additional KEMA certification and other endorsements. These approvals streamline procurement across global sites, simplify regulatory reviews, and support safe, compliant installation in diverse markets and applications.
Integration with Power Xpert Protection Manager and the PXR20 trip unit enables centralized monitoring, diagnostics, and faster fault resolution. This reduces maintenance visits, improves mean time to repair (MTTR), lowers energy waste from nuisance trips, and supports a stronger total cost of ownership (TCO) for mission-critical power distribution.