Eaton MDLB3800 Molded Case Breaker - UL Listed 65 kAIC
Part Number: MDLB3800
Quick Summary
Molded Case Breaker MDLB3800 provides reliable overcurrent protection for three-phase motor control centers. Engineers often face space constraints and coordination challenges when upgrading legacy panels, making a compact, high-current solution essential. This UL Listed Series C MCCB delivers robust protection with a fixed thermal trip and a complete MDL frame, designed for straightforward retrofits and predictable performance. By leveraging Eaton’s Series C architecture, maintenance intervals can be reduced and downtime minimized, while ensuring compliance with industrial protection standards. For design teams, MDLB3800 translates to safer, more scalable power distribution and improved asset uptime across manufacturing and process environments.
Product Information
Extended Description
MDLB3800 Eaton: Eaton Series C complete molded case circuit breaker, MDL-frame, MDLB, Complete breaker, Fixed thermal
Product Name
Eaton Series C complete molded case circuit breaker
Catalog Number
MDLB3800
UPC
782114586327
Product Length/Depth
0.01 in
Product Height
0.01 in
Product Width
0.01 in
Product Weight
0.01 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
Frame
MDL
Interrupt rating
65 kAIC at 240 Vac 50 kAIC at 480 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
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Breaker service centers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
Circuit Breakers Explained
Circuit Breakers Explained
Series C J-Frame molded case circuit breakers time current curves
Series C J-Frame molded case circuit breakers time current curves
Series C J-Frame molded case circuit breakers time current curves
Series C J-Frame molded case circuit breakers time current curves
Series C J-Frame molded case circuit breakers time current curves
Feature → Business Impact → Application: 800 A amperage rating supports high-load motor circuits and critical equipment protection, reducing nuisance trips and improving system availability in heavy manufacturing lines. This translates to lower unplanned downtime and improved production throughput in assembly and extrusion facilities. The fixed thermal trip delivers consistent protection under varying ambient conditions, enabling reliable motor starting and reducing insulation stress in harsh environments. Application-wise, the MDLB3800 fits Series C MDL frames for quick integration into existing switchgear and MCCs, delivering a compact footprint that frees panel space and simplifies wiring congested installations. The three-pole design ensures balanced protection across phases, enhancing coordination with upstream protection devices and improving selectivity. Time-current curves and datasheets are readily available to support engineering analysis and future-proof upgrades. Compatibility with multi-wire terminals and plug-in adapters further reduces field labor and commissioning time, yielding measurable total cost of ownership reductions.
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FAQs
MDLB3800 is a three-pole molded case breaker built on the MDL frame within Eaton's Series C. For installation, ensure mounting within compatible switchgear or MCC enclosures, proper alignment with fixed terminals, and adherence to manufacturer torque specs. Its fixed thermal trip and UL Listed certification support consistent protection during commissioning and ongoing operation, while wiring follows standard multi-wire terminal practices to maintain clear, safe terminations.
The MDLB3800 provides an 800 A rating and a 65 kAIC interrupt capability at 240 Vac, making it suitable for high-current motor circuits and short-circuit events. Its T186 trip type delivers reliable, predictable tripping behavior, while the Series C MDL frame ensures compatibility with existing buses and panels. The combination reduces nuisance trips and improves uptime in pump, fan, and compressor applications.
Yes. Eaton provides time-current curves and datasheets for Series C J-Frame MCCBs, including the MDLB3800. Access to application notes, product selection guides, and MCCB time-current curves supports accurate coordination studies and ensures the device meets protection objectives in motor-control centers and power distribution panels.
MDLB3800 carries UL Listed certification, confirming compliance with recognized safety standards for molded case circuit breakers. This certification supports risk reduction, regulatory compliance, and easier procurement within regulated industrial environments, enabling smoother acceptance by electrical inspectors and asset owners during audits and new installations.
Choosing a complete molded case breaker from Eaton offers predictable maintenance planning thanks to fixed thermal trip characteristics and standard warranty terms (one year from installation or 18 months from shipment). The MDLB3800’s compatibility with MDL frames, UL Listed protection, and accessible specification sheets reduce downtime during replacements and upgrades, delivering improved asset uptime and lower life-cycle costs in demanding production facilities.