Eaton Magnum low voltage circuit breaker - MPS85N4WEAXX2F - 85 kAIC
Part Number: MPS85N4WEAXX2F
Quick Summary
Eaton Magnum low voltage circuit breaker is a heavy-duty protection device designed for industrial electrical systems and panel protections. It delivers reliable fault-current interruption while enabling precise selective coordination and straightforward maintenance. Engineers often face nuisance trips, extended downtime, and complex trip-unit configurations; this solution mitigates those challenges with a modular Magnum PXR trip unit and a robust four-pole drawout design. Certified for global use, it carries UL Listed, CE Marked, and CSA Certified credentials, supporting cross-border projects and regulatory compliance. The double-standard frame and PXR20 LSIG ARMS enhance installation flexibility and system reliability, while the 5000 A Iu rating and 85 kAIC interrupt capacity translate to measurable reductions in downtime and service costs across plant operations.
Product Information
Extended Description
MPS85N4WEAXX2F Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Double standard frame, 5000 A (NNAABBCC), 85 kA, Four-pole, Drawout vertical mounting, PXR20 LSIGAM trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPS85N4WEAXX2F
UPC
786689638078
Product Length/Depth
16.3 in
Product Height
16.8 in
Product Width
44.1 in
Product Weight
319 lb
Compliances
CCC Marked SABA Listed CE Marked NEMA Compliant
Certifications
CSA Certified Lloyd's Register Certified KEMA Certified UL Listed ANSI ABS Certified DNV GL Certified
Frame
Double standard
Number of poles
Four-pole
Type
Magnum PXR
Frame
Double standard
Series
Magnum
Trip Type
PXR20 LSIG ARMS
Number of poles
Four-pole
Rated uninterrupted current (Iu)
5000 A
Interrupt rating
85 kAIC
Interrupt rating
85 kAIC
Rated uninterrupted current (Iu)
5000 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 x32 22.06 1
Power Xpert Protection Manager x32 22.06 1
Eaton Specification Sheet - MPS85N4WEAXX2F
Eaton Specification Sheet - MPS85N4WEAXX2F
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: 85 kAIC interrupt rating → Business impact: Provides robust fault current interruption to minimize damage and downtime during short-circuits, enabling safer, more reliable panel protection. Application: suitable for high-energy industrial feeders and motors where fault energy must be limited promptly. Feature: 5000 A Iu rating → Business impact: supports continuous operation under heavy load without compromising protection, reducing nuisance trips and unnecessary maintenance. Application: large manufacturing lines and process industries with high inrush and sustained loads. Feature: Magnum PXR trip unit (PXR20 LSIG ARMS) → Business impact: enables selective coordination and fast protection response, improving safety and fault isolation. Application: critical feeders requiring fast clear and arc energy management. Feature: Drawout vertical mounting, four-pole frame → Business impact: simplifies installation, testing, and maintenance in crowded panels while delivering balanced three-phase protection. Application: switchgear racks and control cabinets with limited clearance. Feature: Compliance and certifications → Business impact: ensures regulatory readiness and risk reduction across markets, facilitating procurement and installation across projects. Application: OEM panels, data centers, and critical infrastructure. Feature: Zone-selective interlocking and supporting literature → Business impact: enables faster fault isolation and reduced energy release with proper wiring and interlock schemes. Application: large plant protection schemes and coordinated protection architectures.
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FAQs
The MPS85N4WEAXX2F features a drawout vertical mounting design within the Magnum PXR family. For installation, ensure compatible switchgear with a double-standard frame, four-pole configuration, and adequate clearance. Verify interlock alignment if zone-selective interlocking is used. Follow Eaton’s mounting guidelines and the PXR user manuals to guarantee proper seating, electrical connections, and safe operation during maintenance.
Key specs include a rated uninterrupted current (Iu) of 5000 A and an interrupt rating of 85 kAIC. The unit is a four-pole breaker with a Magnum PXR trip unit, designed for high-energy applications and stringent fault-current conditions. These ratings support reliable protection for large motors, feeders, and critical process lines.
Yes. The MPS85N4WEAXX2F is a four-pole, double-standard frame Magnum PXR-based breaker with LSIG ARMS trip unit. It is designed to provide coordinated protection for three-phase systems in industrial settings, supporting precise fault isolation, improved selectivity, and compatibility with Power Xpert Protection Manager workflows when integrated into plant protection architectures.
The unit carries UL Listed, CE Marked, and CSA Certified credentials, among others (Lloyd's Register, KEMA, ANSI, ABS, DNV GL). These certifications validate safety, performance, and cross-border admissibility, reducing procurement risk and easing regulatory approvals for international projects and compliance-driven maintenance programs.
Maintenance benefits include modular trip-unit architecture enabling targeted servicing, quicker diagnostic access, and long service life with robust, field-proven performance. ROI advantages come from reduced downtime during faults, lower energy losses due to improved selectivity, and easier integration with protection management tools such as Power Xpert Protection Manager (x32/x64) for proactive maintenance and fewer spare-part reallocations.