Eaton LDCB3300 Complete MCCB - UL 489 Certified
Part Number: LDCB3300
Quick Summary
The Eaton LDCB3300 complete MCCB is a high-capacity molded case circuit breaker for industrial power distribution and motor protection. Manufacturers and maintenance teams often struggle with nuisance trips, space constraints, and lengthy commissioning when upgrading protection schemes. This unit carries UL 489 certification and is built on an L-frame Series C platform to deliver reliable performance under 50/60 Hz service. With aluminum line and load terminals and a fixed thermal/magnetic trip, it supports fast, safe installation and long-term compliance. Together with Eaton's warranty and service options, it reduces total cost of ownership by lowering maintenance cycles and simplifying panel design. The 300 A rating and robust interrupt capability make it suitable for demanding feeders and motor circuits in modern plants.
Product Information
Extended Description
LDCB3300 Eaton: Eaton Series C complete molded case circuit breaker, L-frame, LDCB, Complete breaker, Fixed thermal, fixed magnetic trip type, Three-pole, 300A, 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
LDCB3300
UPC
782113965307
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
Type
Complete breaker
Amperage Rating
300 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
100 kAIC at 480 Vac 200 kAIC at 240 Vac
Number of poles
Three-pole
Application of Multi-Wire Terminals for Molded Case Circuit Breakers
Application of Multi-Wire Terminals for Molded Case Circuit Breakers
Application of Multi-Wire Terminals for Molded Case Circuit Breakers
Plug-in adapters for molded case circuit breakers product aid
Plug-in adapters for molded case circuit breakers product aid
Plug-in adapters for molded case circuit breakers product aid
Plug-in adapters for molded case circuit breakers product aid
Plug-in adapters for molded case circuit breakers product aid
Plug-in adapters for molded case circuit breakers product aid
Plug-in adapters for molded case circuit breakers product aid
Breaker service centers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
Circuit Breakers Explained
Circuit Breakers Explained
Eaton Specification Sheet - LDCB3300
Eaton Specification Sheet - LDCB3300
Eaton Specification Sheet - LDCB3300
Eaton Specification Sheet - LDCB3300
Eaton Specification Sheet - LDCB3300
Feature: 300 A amperage rating and three-pole LDCB platform. Business Impact: Enables protection of large motor loads and high-demand feeders with predictable trip behavior, reducing the risk of overheating and false trips. Application: Main power feeds and motor control centers in manufacturing lines and packaging equipment. Feature: 200 kAIC at 240 VAC and 100 kAIC at 480 VAC interrupt ratings. Business Impact: Provides superior fault-current protection, improving panel safety margins and minimizing equipment damage during short circuits. Application: Panels connected to high fault-current networks and critical machines. Feature: Aluminum line and load terminals. Business Impact: Improves conductivity, mitigates corrosion, and eases field maintenance with durable termination hardware. Application: Harsh industrial environments and long-term service life in panelboards. Feature: UL 489 certification. Business Impact: Enables regulatory compliance and smoother approvals in systems requiring recognized safety standards; reduces procurement risk. Application: Industrial facilities with strict safety and reliability requirements. Feature: 50/60 Hz operation and fixed thermal/magnetic trip (T186). Business Impact: Delivers consistent protection across regional power systems and simplifies integration with existing control schemes. Application: Global manufacturing sites and process lines using standard utility frequency. Feature: Compact L-frame, three-pole assembly with line/load terminals. Business Impact: Facilitates retrofits and panel redesigns by fitting standard MCCB footprints while maintaining high protection levels. Application: Replacement upgrades in legacy switchgear and new panelboard installations. Feature: 13 in length, 7.5 in height, 10.5 in width, 23 lb weight. Business Impact: Clear space planning and manageable weight for installation in crowded control panels. Application: Enclosures with strict space constraints and ergonomic handling needs. The combination of these features supports measurable outcomes such as improved protection reliability, reduced downtime, and streamlined compliance workflows across power distribution networks in industrial facilities.
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FAQs
Yes. The LDCB3300 is a three-pole L-frame complete molded case circuit breaker designed for standard panelboard applications. It uses line and load aluminum terminals and fits typical MCCB enclosures found in industrial control panels. With a 13 in depth and 10.5 in width, it integrates into common chassis footprints while delivering reliable protection and straightforward field replacement.
The LDCB3300 provides a 300 A amperage rating with three poles, and it operates at 50 to 60 Hz. It offers interrupt ratings of 200 kAIC at 240 VAC and 100 kAIC at 480 VAC. The unit is UL 489 listed and features fixed thermal and fixed magnetic trip (T186) for fast, dependable fault protection in demanding industrial circuits.
This MCCB excels in main feeders, motor protection, and panelboard protection within industrial facilities. Its high interrupt ratings make it suitable for loads with significant fault current, while the 50/60 Hz compatibility supports global manufacturing sites. Its compact L-frame design and line/load terminals simplify retrofits and new installations in control panels and power distribution systems.
The LDCB3300 carries UL 489 certification, indicating compliance with recognized safety and performance standards for molded case circuit breakers. This certification supports regulatory approvals, safety audits, and reliability expectations in industrial environments, reducing procurement risk and helping ensure consistent protection across electrical installations.
The LDCB3300 aligns with Eaton’s warranty policy 25-000, offering one year from installation or eighteen months from shipment. Its robust aluminum terminals, high interrupt ratings, and proven UL 489 compliance help minimize downtime and maintenance costs, delivering predictable lifecycle performance and improved total cost of ownership for critical power systems.