Eaton MPS8403WEAXX2S Magnum low voltage circuit breaker - UL Listed

MPS8403WEAXX2S
Manufacturer
Eaton
Part number
MPS8403WEAXX2S
Category

Quick Summary

Eaton Magnum low voltage power circuit breaker is designed to protect critical power distribution in industrial environments by interrupting faults with precision. In demanding plants, installers often struggle with long downtime, difficult maintenance, and uncertain coordination across protection devices. UL Listed, CE Marked, and NEMA Compliant certifications provide confidence for global deployments while preserving safety and reliability. Built around the Magnum PXR trip unit, this breaker integrates with Power Xpert Protection Manager for monitoring and control, delivering tangible business value through improved uptime, safer operations, and streamlined commissioning.

Product Information

Extended Description

MPS8403WEAXX2S Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 4000 A (ABCABC), 85 kA, Three-pole, Drawout vertical mounting, PXR25 LSIGAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPS8403WEAXX2S
UPC
786689628734
Product Length/Depth
16.3 in
Product Height
16.8 in
Product Width
31.1 in
Product Weight
237 lb
Compliances
CE Marked CCC Marked NEMA Compliant SABA Listed
Certifications
KEMA Certified ANSI UL Listed Lloyd's Register Certified CSA Certified ABS Certified DNV GL 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 Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx 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 - MPS8403WEAXX2S Eaton Specification Sheet - MPS8403WEAXX2S 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: Magnum PXR trip unit with LSIGAM arms provides selective protection and fast fault isolation. Business Impact: Improves protection coordination, reduces arc energy exposure, and minimizes downstream damage. Application: Ideal for heavy-duty motor loads and critical distribution feeders in manufacturing lines. Feature: 4000 A Iu rating with 85 kAIC interrupt capability supports high fault currents without compromising breaker integrity. Business Impact: Higher system resilience and safer shutdowns, leading to reduced mean time to repair. Application: Large industrial plants and data centers with robust bus configurations. Feature: Double standard frame with three-pole, drawout vertical mounting enhances installation flexibility. Business Impact: Faster panel integration and easier maintenance, lowering installation costs. Application: Retrofit projects and modular switchgear setups. Feature: Comprehensive certifications and compliance (UL Listed, CE Marked, NEMA Compliant). Business Impact: Simplified procurement and regulatory readiness across regions. Application: Global manufacturing sites with cross-border equipment sourcing. Feature: Compatibility with Power Xpert Protection Manager for proactive monitoring and protection analytics. Business Impact: Real-time visibility, predictive maintenance, and improved asset lifespan. Application: Remote plants and multi-site operations. Feature: Availability of renewal parts, accessories, and detailed manuals supports lifecycle cost reduction. Business Impact: Lower total cost of ownership and faster repairs. Application: Maintenance programs and service contracts across facilities.

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FAQs

This unit features a drawout vertical mounting with a double standard frame and three poles, designed for easy integration into existing switchgear or panelboards. When installing, verify busbar alignment, ensure proper clearance for withdrawal, and connect to a Power Xpert Protection Manager network if monitoring is required. The setup supports straightforward commissioning and fast fault testing without extensive disassembly.
Key specs include a rated uninterrupted current (Iu) of 4000 A and an interrupt rating of 85 kAIC. It is a three-pole Magnum PXR with a double standard frame, designed for 4000 A continuous operation and robust fault handling. The unit is UL Listed, CE Marked, and NEMA Compliant, ensuring compatibility with global electrical codes.
Yes. The breaker uses the PXR25 LSIG ARMS trip unit, which supports selective coordination schemes and zone selective interlocking. This enables selective tripping along feeders, reducing the impact of faults on non-affected circuits and improving overall plant availability while simplifying coordination studies in complex distributions.
The breaker carries UL Listed and CE Marked certifications, along with NEMA compliance. Additional third-party verifications include KEMA Certification and various regional certifications such as CSA, ABS, Lloyd's Register, and DNV GL. These credentials support procurement for global projects and ease customer inspections and audits.
Eaton provides Magnum renewal parts and accessories, plus manuals and guides, to simplify maintenance and extend service life. Regular availability of replacement trip units, contacts, and drawout parts minimizes downtime and obsolescence risk, while documented guides (Quick Start, user manuals) speeds on-site repairs and reduces service time and expenses.