Eaton LW3400 Molded Case Circuit Breaker - IEC Rated

Part Number: LW3400
Manufacturer
Eaton
Part number
LW3400

Quick Summary

LW3400 molded case circuit breaker protects power systems by interrupting fault currents in industrial applications. Engineers often struggle to find a high-current MCCB that fits standard panels while meeting global standards. Designed for global usage, the LW3400 carries IEC Rated compliance and supports safe operation across diverse markets. With a 400 A rating, 690 Vac/250 Vdc capability, and three-pole construction, this Series C device delivers predictable trip behavior and easy coordination with upstream protections. Its line-and-load terminals, L-frame format, and compatibility with standard enclosures streamline installation while reducing panel complexity and lifecycle costs.

Product Information

Extended Description

LW3400 Eaton: Eaton Series C complete molded case circuit breaker, L-frame, LW, Complete breaker, Interchangeable thermal-magnetic trip type, Three-pole, 400A, 690 Vac, 250 Vdc, 45 kAIC at 415 Vac, Line and load, World
Product Name
Eaton Series C complete molded case circuit breaker
Catalog Number
LW3400
UPC
786679055854
Product Length/Depth
4.06 in
Product Height
8.25 in
Product Width
8.25 in
Product Weight
21 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
IEC Rated
Amperage Rating
400 A
Voltage rating
690 Vac, 250 Vdc
Trip Type
T207
Circuit breaker type
LW
Circuit breaker frame type
Complete breaker
Terminals
Line and load
Frame
L
Class
World
Interrupt rating
45 kAIC at 415 Vac
Number of poles
Three-pole
Feature: Interchangeable thermal-magnetic trip (T207) provides precise overcurrent protection. Business Impact: Improves selective coordination and minimizes nuisance trips, reducing maintenance churn. Application: Ideal for panelboards and main feeder protections in manufacturing and processing plants. Feature: 400 A amperage rating at 690 Vac / 250 Vdc. Business Impact: Supports high-load feeders and motor circuits, enabling smaller upstream devices and improved fault isolation. Application: Suitable for large distribution blocks and critical line feeds in industrial facilities. Feature: Line and load terminals with an L-frame complete breaker design. Business Impact: Delivers plug-in compatibility and straightforward installation, reducing commissioning time and field wiring errors. Application: Standard MCCB installations in control panels and switchgear where reliable termination is essential. Feature: Series C molded case, three-pole configuration, 45 kAIC interrupt rating at 415 Vac. Business Impact: Enables robust short-circuit protection and fast interruption to minimize damage and downtime. Application: Industrial power distribution and safe shutdown scenarios in harsh environments. Feature: IEC Rated certification and global compatibility. Business Impact: Supports regulatory compliance across regions, aiding procurement and reducing design risks. Application: International projects and multi-site deployments where standardization matters. Feature: Comprehensive technical resources including time-current curves and product guides. Business Impact: Improves coordination studies and reduces design iteration time. Application: Engineering validation, protection coordination, and maintenance planning.

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FAQs

LW3400 uses line and load terminals in an L-frame three-pole format designed for standard molded case panel installations. Its dimensions (4.06 in depth, 8.25 in height and width) and 21 lb weight support straightforward mounting in common MCCB enclosures. Ensure the enclosure accepts Series C LW frame breakers and that wiring adheres to local termination practices.
LW3400 is a 400 A, 690 Vac / 250 Vdc rated molded case circuit breaker with three poles. It uses a T207 trip type and provides 45 kAIC interrupt rating at 415 Vac. The device is designed as a complete Series C LW frame, with line and load terminals for direct panel integration.
Yes. The LW3400 carries IEC Rated certification, which aligns with international standards for electrical protection devices. This makes the breaker suitable for global projects and multi-site deployments where IEC-based compliance is a key selection criterion.
Eaton provides a warranty aligned with policy 25-000: one year from the date of installation or eighteen months from shipment, whichever occurs first. This coverage supports field reliability, with access to Eaton support channels and authorized service centers for troubleshooting and parts.
Technical data, including time-current curves and product guides, are available through Eaton’s resources. Key assets include the Series C J-Frame time-current curves PDFs and the LW3400 product page PDF (skuPage.LW3400.pdf), plus accessory and installation guides in the downloads section.