Eaton MDLB2400 Molded Case Circuit Breaker - UL Listed

Part Number: MDLB2400
MDLB2400
Manufacturer
Eaton
Part number
MDLB2400
Category

Quick Summary

The MDLB2400 molded case circuit breaker from Eaton delivers reliable protection for medium- to heavy-duty electrical systems in panelboards and motor control centers. Engineers face the challenge of balancing high fault-current capability with compact form factors and straightforward installation, and this device is designed to meet those needs with a two-pole, 400 A rating and fixed thermal-magnetic trip. The unit is UL Listed, and Eaton provides time-current curves and installation resources to support code compliance and proper coordination with downstream devices. By combining robust interrupt performance with predictable maintenance and warranty terms, the MDLB2400 offers dependable protection that reduces downtime and supports faster project delivery. Auxiliary keywords include Series C MCCB and MDL frame compatibility for enhanced search relevance.

Product Information

Extended Description

MDLB2400 Eaton: Eaton Series C complete molded case circuit breaker, MDL-frame, MDLB, Complete breaker, Fixed thermal, fixed magnetic trip type, Two-pole, 400A, 65 kAIC at 240 Vac, 50 kAIC at 480 Vac, 50/60 Hz
Product Name
Eaton Series C complete molded case circuit breaker
Catalog Number
MDLB2400
UPC
782114586112
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
400 A
Trip Type
T186
Circuit breaker type
MDLB
Circuit breaker frame type
Complete breaker
Series
Series C
Frame
MDL
Frequency rating
50 to 60 Hz
Interrupt rating
65 kAIC at 240 Vac 50 kAIC at 480 Vac
Number of poles
Two-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 Power metering and monitoring with Modbus RTU product aid Power metering and monitoring with Modbus RTU product aid Power metering and monitoring with Modbus RTU product aid Power metering and monitoring with Modbus RTU product aid Power metering and monitoring with Modbus RTU product aid Power metering and monitoring with Modbus RTU product aid Power metering and monitoring with Modbus RTU 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: 400 A amperage with fixed thermal and fixed magnetic trip delivers reliable overcurrent protection and reduces equipment damage, downtime, and arc-flash risk in critical processes. This enables faster startup, safer maintenance windows, and predictable coordination with downstream protection devices in panelboards and machine controls. Feature → Application: 65 kAIC interrupt rating at 240 Vac and 50 kAIC at 480 Vac provides strong fault-current interruption for high-energy systems, improving service continuity in manufacturing lines and distribution panels. Feature → Application: Two-pole MDLB configuration with Series C MDL frame simplifies installation in compact enclosures, enabling quicker panel fabrication and standardization across multi‑line drum or conveyor systems. Feature → Business Impact: UL Listed certification ensures compliance and trusted performance, reducing procurement risk and enhancing regulator-ready documentation for plant safety programs. Feature → Application: Access to Eaton technical resources, time-current curves, and compatible accessories supports lifecycle maintenance, easier retrofits, and streamlined change orders in retrofit projects. Feature → Application: Durable construction and documented warranty (one year from installation or eighteen months from shipment) provide total-cost-of-ownership benefits and lower long-term maintenance costs for OEMs and panel builders.

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FAQs

MDLB2400 is a two-pole, MDL-frame complete breaker designed for Eaton Series CJ-Frame/Dual-rail panels. Its MDL frame and two-pole design simplify integration into existing panel boards, reducing wiring complexity and enabling straightforward retrofits or new builds with standard components.
Key specs include a 400 A amperage rating, fixed thermal-magnetic trip (T186), 65 kAIC interrupt rating at 240 Vac, and 50 kAIC at 480 Vac, with a 50/60 Hz frequency rating. These specs ensure robust short-circuit protection and reliable operation in typical industrial power networks.
Yes. The MDLB2400 is a Series C molded case breaker with a fixed magnetic trip suitable for motor control centers and machine protection panels, where predictable coordination and fast interruption are critical to prevent motor damage and unplanned downtime.
The MDLB2400 carries UL Listed certification, confirming compliance with recognized safety standards for molded case circuit breakers and supporting regulator-ready documentation for industrial installations.
Eaton provides a warranty policy (25-000) offering one year from installation or eighteen months from shipment, whichever occurs first. Additional resources include application notes, time-current curves, and datasheets available via Eaton’s downloads for installation, maintenance, and coordination guidance.