Eaton Magnum MPS8403HEAXX2Q Power Circuit Breaker - 85 kA

MPS8403HEAXX2Q
Manufacturer
Eaton
Part number
MPS8403HEAXX2Q
Category

Quick Summary

The Eaton Magnum low voltage power circuit breaker MPS8403HEAXX2Q safeguards industrial mains and switchgear with robust protection. For engineers, coordinating protective devices across large panels is time-consuming and error-prone; this unit’s PXR25 LSIAM trip unit and zone selective interlocking simplify setup and improve fault isolation. It carries CE Marked, UL Listed, CSA Certified, and NEMA compliant credentials, with additional KEMA, ANSI, and Lloyd’s Register certifications supporting global installations. By aligning with Power Xpert Protection Manager and common Magnum accessories, the solution delivers streamlined maintenance, easier documentation, and consistent protection across multi-panel ecosystems. The combination of high interrupting capacity, rigorous standards, and installation flexibility translates into lower total cost of ownership and greater system reliability for critical processes.

Product Information

Extended Description

MPS8403HEAXX2Q Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 4000 A (ABCABC), 85 kA, Three-pole, Fixed horizontal mounting, PXR25 LSIAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPS8403HEAXX2Q
UPC
786689628390
Product Length/Depth
16.3 in
Product Height
16.8 in
Product Width
31.1 in
Product Weight
237 lb
Compliances
CE Marked SABA Listed CCC Marked NEMA Compliant
Certifications
KEMA Certified UL Listed CSA Certified Lloyd's Register Certified ANSI 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 x64 22.6 1 Power Xpert Protection Manager x64 22.6 1 Eaton Specification Sheet - MPS8403HEAXX2Q Eaton Specification Sheet - MPS8403HEAXX2Q Magnum low-voltage power circuit breakers (ANSI and IEC) renewal parts and accessories Magnum PXR 20/25 electronic trip units time current curves Safer by design: arc energy reduction techniques Safer by design: arc energy reduction techniques Safer by design: arc energy reduction techniques
Feature: Magnum PXR double-standard frame with 4000 A interrupting capability and 85 kA short-circuit rating. Business Impact: Delivers robust feeder protection for high-load applications, enabling reliable operation and reduced downtime. Application: Large motor feeders and critical process lines in manufacturing facilities. Feature: Three-pole design with fixed horizontal mounting and PXR25 LSIAM trip unit. Business Impact: Simplifies mechanical installation and enhances selective coordination, minimizing unnecessary disconnections. Application: Panel boards and switchgear assemblies requiring precise zone protection. Feature: Zone selective interlocking capability. Business Impact: Limits arc energy exposure and accelerates fault clearance for safer, faster protection. Application: Centralized power distribution with tight safety requirements. Feature: Compliance and certifications including CE, UL, CSA, NEMA; additional KEMA/ ANSI/ Lloyd’s. Business Impact: Eases procurement, auditing, and cross-border deployments; supports regulated industries. Application: Global installations in aerospace, automotive, and process industries. Feature: Compatibility with Magnum renewal parts and Power Xpert tools. Business Impact: Extends lifecycle, reduces maintenance costs, and ensures future-ready protection. Application: Ongoing support in serviceable infrastructure with lifecycle planning.

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FAQs

Arrange for fixed horizontal mounting to match the breaker’s mounting feet, provide adequate space for cooling and terminal access, and ensure a three-pole configuration aligns with downstream protection needs. The unit supports seamless integration with Magnum accessories and Power Xpert systems, helping maintain consistent protection across panels.
The PXR25 LSIAM trip unit offers refined thermal-magnetic protection with adjustable settings and zone coordination. This enables faster fault discrimination, reduces nuisance trips, and improves selective coordination within multi-panel distributions, directly contributing to higher system availability.
Yes. It carries CE Marked and UL Listed credentials, CSA Certified status, and NEMA compliance, with additional certifications from KEMA, ANSI, and Lloyd’s Register supporting global installations and procurement in regulated industries.
Eaton provides Magnum renewal parts and accessories designed for long life-cycle maintenance and compatibility with PXR trip units. Access to renewal catalogs and application notes helps ensure spare parts availability and minimized downtime during maintenance or upgrades.
Ideal for large motor feeders, process lines, and switchgear assemblies requiring high interrupting capacity and robust coordination. Its 4000 A frame, 85 kA SCCR, and Zone Selective Interlocking support demanding environments in manufacturing, chemical processing, and heavy industry.