Eaton LDCB3400 Molded Case Circuit Breaker - UL 489

Part Number: LDCB3400
Manufacturer
Eaton
Part number
LDCB3400

Quick Summary

Eaton LDCB3400 molded case circuit breaker protects electrical distribution panels in industrial automation environments. Design engineers often wrestle with panel space, thermal coordination, and reliable interruption under varying loads. This device is UL 489 certified; in many regions designers also reference CE approvals and IP protection levels, which vary by installation. By combining a compact L-frame design with aluminum line and load terminals, this MCCB simplifies installation, reduces wiring errors, and supports efficient procurement for modernization projects.

Product Information

Extended Description

LDCB3400 Eaton: Eaton Series C complete molded case circuit breaker, L-frame, LDCB, Complete breaker, Fixed thermal, fixed magnetic trip type, Three-pole, 400A, 200 kAIC at 240 Vac, 100 kAIC at 480 Vac, Aluminum, Line and load, 50/60 Hz
Product Name
Eaton Series C complete molded case circuit breaker
Catalog Number
LDCB3400
UPC
782113965284
Product Length/Depth
13 in
Product Height
7.5 in
Product Width
10.5 in
Product Weight
23 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
UL 489
Amperage Rating
400 A
Trip Type
T186
Circuit breaker type
LDCB
Circuit breaker frame type
Complete breaker
Series
Series C
Terminals
Line and load
Frame
L
Frequency rating
50 to 60 Hz
Terminal material
Aluminum
Interrupt rating
200 kAIC at 240 Vac 100 kAIC at 480 Vac
Number of poles
Three-pole
Feature: 400 A amperage rating with three-pole L-frame complete breaker. Business Impact: Enables safe handling of high-load branches while maintaining precise protection, reducing nuisance trips and gear wear. Application: Large control panels and distribution boards in industrial facilities. Feature: Fixed thermal and fixed magnetic trip (T186). Business Impact: Improves protection coordination and fast fault interruption to minimize system downtime. Application: Motor control centers and process lines with mixed loads. Feature: UL 489 certified, Series C, 50/60 Hz operation, aluminum terminals. Business Impact: Assures compliance with safety standards and robust wiring; supports universal panel compatibility and durable connections. Application: Standardized MCCB deployment across diverse panel builds. Feature: Line and load terminals, three-pole, 13 in depth, 10.5 in width, 7.5 in height, 23 lb weight. Business Impact: Predictable footprint for space-constrained enclosures and straightforward installation. Application: Retrofit and new installations where panel space is at a premium. Feature: 200 kAIC at 240 VAC and 100 kAIC at 480 VAC interrupt ratings. Business Impact: High fault-current resilience reduces system risk and protects feeders downstream. Application: Industrial power distribution with heavy transient currents. Feature: Warranty and service support (1 year from installation or 18 months from shipment). Business Impact: Lower total cost of ownership through covered maintenance considerations. Application: Field service planning and procurement timelines. Feature: Documentation and compatibility resources (plan with Plug-in adapters, product selection guides). Business Impact: Accelerates design-in, standardizes componentry, and eases future upgrades. Application: Engineering routines and spares management for panel builders.

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FAQs

LDCB3400 is designed for standard three-pole Series C MCCB installations with L-frame mounting and line/load terminals. It fits common industrial distribution panels and control cabinets that support molded case breakers, simplifying procurement and retrofit projects while preserving electrical coordination and wiring practices.
The LDCB3400 provides a 400 A rating with a fixed thermal and fixed magnetic (T186) trip. It offers 200 kAIC interrupt rating at 240 VAC and 100 kAIC at 480 VAC, and operates at 50/60 Hz. These specs support reliable protection for high-demand loads and fast fault clearance in industrial circuits.
Yes. For 480 VAC systems, the LDCB3400 delivers 100 kAIC interrupt capacity, with aluminum line/load terminations and a robust L-frame design to withstand high transient currents typical in industrial environments. Ensure proper wire sizing and panel compatibility for optimal performance.
LDCB3400 is UL 489 certified, confirming safety and performance for molded case circuit breakers. Regional compliance (such as CE or IP ratings) can vary by installation and jurisdiction, so verify local requirements and implement accordingly during design and commissioning.
The product carries Eaton’s warranty of one year from installation or eighteen months from shipment, whichever comes first. Field service centers and engineering documentation are available to support maintenance, retrofits, and spare-part planning, reducing downtime and total cost of ownership.