Eaton MDLB3800W Molded Case Circuit Breaker - UL Listed

Part Number: MDLB3800W
Manufacturer
Eaton
Part number
MDLB3800W

Quick Summary

Molded case circuit breakers from Eaton MDLB3800W protect electrical panels by interrupting faults in industrial power systems. Engineers often struggle with space constraints, uneven fault timing, and inconsistent trip coordination across enclosures. UL Listed certification underpins safety and reliability, while the Series C MDL frame design enables compact, scalable protection for 3-phase systems. By combining rugged interrupt ratings with flexible installation options, it supports faster commissioning and lower lifecycle costs, aligning with maintenance and compliance goals for modern industrial facilities.

Product Information

Extended Description

MDLB3800W Eaton: Eaton Series C complete molded case circuit breaker, MDL-frame, MDLB, Complete breaker, Fixed thermal, fixed magnetic trip type, Three-pole, 800A, 65 kAIC at 240 Vac, 50 kAIC at 480 Vac, Without terminals, 50/60 Hz
Product Name
Eaton Series C complete molded case circuit breaker
Catalog Number
MDLB3800W
UPC
782114371411
Product Length/Depth
18 in
Product Height
8 in
Product Width
11 in
Product Weight
26 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 Listed
Amperage Rating
800 A
Trip Type
T186
Circuit breaker type
MDLB
Circuit breaker frame type
Complete breaker
Series
Series C
Terminals
Without terminals
Frame
MDL
Interrupt rating
65 kAIC at 240 Vac 50 kAIC at 480 Vac
Number of poles
Three-pole
Feature: 800 A amperage rating. Business Impact: Enables protection of large feeders and high-load panels without nuisance trips. Application: suitable for motor control centers and distribution boards in automation and manufacturing environments. Feature: 65 kAIC interrupt rating at 240 Vac / 50 kAIC at 480 Vac. Business Impact: rapid fault clearance to minimize damage and downtime, enhancing system availability. Application: heavy-duty power distribution and critical process lines. Feature: Fixed thermal-magnetic trip (T186). Business Impact: reliable protection with well-defined trip characteristics and selectivity between feeders. Application: protection schemes requiring predictable coordination in 3-phase systems. Feature: MDLB MDL frame, Series C complete breaker. Business Impact: compact, modular form factor supports easy panel integration and scalable protection. Application: retrofit or new installations in switchgear and panelboards. Feature: Without terminals. Business Impact: flexible termination options for field wiring and custom lug configurations; simplifies installation in varied panel architectures. Application: custom-engineered assemblies and retrofit projects. Feature: UL Listed certification. Business Impact: streamlines procurement, compliance, and QA processes for global projects. Application: industrial automation, electrical protection, and panel assembly ecosystems.

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FAQs

MDLB3800W uses the MDL frame within the Series C modular line, delivering a complete 3-pole breaker without terminals. It fits standard Series C bus arrangements and is designed for integration into panelboards and switchgear with compatible field-terminals or customer-lug configurations. This supports straightforward upgrades or replacements in existing installations.
The MDLB3800W is rated for 800 A, with an interrupt rating of 65 kAIC at 240 Vac and 50 kAIC at 480 Vac. It features a fixed thermal-magnetic trip type (T186) and three poles, making it suitable for robust 3-phase distribution and motor protection in industrial environments.
Yes, the MDLB3800W is UL Listed. This indicates third-party verification of safety and performance in North American markets, helping with compliance documentation, procurement approvals, and reducing qualification time during audits or regulatory reviews.
Without terminals, the MDLB3800W requires user-supplied or field-installed terminals. This offers flexible termination options and easier integration into customized panel architectures, while still preserving protective performance and coordinated trip behavior within Series C configurations.
The product is covered under Eaton’s warranty policy 25-000, offering one year from installation or 18 months from shipment, whichever comes first. This warranty supports warranty claim processing, service centers, and access to Eaton’s technical resources for maintenance and replacement parts.