Eaton MPS8403HEAXX2S Power Circuit Breaker - 85 kAIC

MPS8403HEAXX2S
Manufacturer
Eaton
Part number
MPS8403HEAXX2S
Category

Quick Summary

Eaton MPS8403HEAXX2S is a Magnum power circuit breaker for protecting three-phase industrial electrical systems. In demanding environments, unreliable protection leads to unplanned downtime and equipment damage, so you need dependable performance and fast fault clearing. It carries UL Listed, CSA Certified, and CE Marked certifications, with broader approvals including KEMA and Lloyd's Register, supporting global compliance. The built-in PXR25 LSIG trip unit and Magnum PXR frame enable scalable protection and easy integration with advanced protection systems and field-bus control schemes, delivering reliability, safety, and operational efficiency for your power distribution infrastructure.

Product Information

Extended Description

MPS8403HEAXX2S Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 4000 A (ABCABC), 85 kA, Three-pole, Fixed horizontal mounting, PXR25 LSIGAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPS8403HEAXX2S
UPC
786689628406
Product Length/Depth
16.3 in
Product Height
16.8 in
Product Width
31.1 in
Product Weight
237 lb
Compliances
SABA Listed CE Marked CCC Marked NEMA Compliant
Certifications
KEMA Certified Lloyd's Register Certified UL Listed CSA Certified ANSI DNV GL Certified ABS Certified
Frame
Double standard
Number of poles
Three-pole
Type
Magnum PXR
Frame
Double standard
Series
Magnum
Trip Type
PXR25 LSIG ARMS
Number of poles
Three-pole
Rated uninterrupted current (Iu)
4000 A
Interrupt rating
85 kAIC
Interrupt rating
85 kAIC
Rated uninterrupted current (Iu)
4000 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 - MPS8403HEAXX2S Eaton Specification Sheet - MPS8403HEAXX2S 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: Rated uninterrupted current (Iu) of 4000 A and interrupt rating of 85 kAIC. Business Impact: Enables safe interruption of large fault currents while minimizing nuisance trips, reducing unplanned downtime and equipment damage. Application: Large motor feeders and high-load distribution cabinets in manufacturing and processing plants. Feature: PXR25 LSIG trip unit. Business Impact: Delivers precise coordination and arc-energy management to improve selectivity and safety. Application: Complex power networks requiring reliable protection with arc-energy reduction in process lines and packaging facilities. Feature: Double standard frame with three-pole design. Business Impact: Streamlines replacement, retrofits, and panel integration within existing Magnum installations. Application: Control panels and switchgear assemblies in industrial plants relying on consistent frame compatibility. Feature: Fixed horizontal mounting. Business Impact: Simplifies installation, alignment, and service access, reducing commissioning time and risk of wiring errors. Application: Field and panel installations in compact electrical rooms. Feature: Comprehensive certifications and compliance. Business Impact: Lowers procurement risk and accelerates regulatory approvals for multinational sites. Application: Global manufacturing, oil & gas, and chemical processing facilities requiring UL, CSA, CE and related approvals. Feature: Power Xpert Protection Manager compatibility. Business Impact: Enables remote monitoring, data logging, and integration with digital protection strategies for improved uptime and maintenance planning. Application: Modern smart factories and large distributed installations.

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FAQs

The MPS8403HEAXX2S supports integration with Eaton's Power Xpert Protection Manager, enabling monitoring, event logging, and coordinated protection across a sites' protection scheme. The PXR25 LSIG trip unit provides precise, selectivity-friendly protection, while the device's open interfaces and Eaton documentation simplify setup and ongoing management in control rooms and remote locations.
This is a three-pole Magnum breaker with a rated uninterrupted current (Iu) of 4000 A and an interrupt rating of 85 kAIC. It is designed for large motor feeders and high-load distribution, delivering reliable fault interruption while maintaining system continuity under normal operation.
Ideal for industrial motor control centers, process lines, and large feeders in manufacturing and heavy industry. Its 4000 A Iu capacity and 85 kAIC interrupt rating make it suitable for demanding applications where high fault currents exist and dependable protection is essential.
The device carries UL Listed, CSA Certified, and CE Marked approvals, with additional validations including KEMA and Lloyd's Register. It also aligns with NEMA compliance and ANSI standards, reducing regulatory risk for multi-region deployments.
Plan for a fixed horizontal mounting in a double standard frame, three-pole layout, and a substantial 237 lb weight. Ensure panel space accommodates dimensions (approximate depth 16.3 in, height 16.8 in, width 31.1 in) and provide adequate clearance for wiring, heat dissipation, and service access. Compatibility with Power Xpert tools should be accounted for during commissioning.