Eaton MDLB3500 Molded Case Circuit Breaker - UL Listed
Part Number: MDLB3500
Quick Summary
MDLB3500 Molded Case Circuit Breaker provides reliable overcurrent protection for industrial and commercial panelboards. This three-pole unit in the Series C MDL frame simplifies safe, standardized protection across critical power feeds. Engineers often struggle with nuisance trips, mismatched trip curves, and limited replacement availability in aging installations; the MDLB3500 addresses these by fixed thermal and fixed magnetic trip design and a robust 500 A rating. UL Listed certification ensures compliance with safety standards for electrical protection equipment, while the Series C documentation supports consistent coordination with upstream protective devices. By leveraging compatible StrandAble terminals and modular accessories, you gain faster installation and lower total cost of ownership across multiple sites.
Product Information
Extended Description
MDLB3500 Eaton: Eaton Series C complete molded case circuit breaker, MDL-frame, MDLB, Complete breaker, Fixed thermal, fixed magnetic trip type, Three-pole, 500A, 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
MDLB3500
UPC
782114586297
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
500 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
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
StrandAble terminals product aid
StrandAble terminals product aid
StrandAble terminals product aid
StrandAble terminals product aid
StrandAble terminals product aid
StrandAble terminals product aid
StrandAble terminals product aid
Breaker service centers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
Circuit Breakers Explained
Circuit Breakers Explained
Series C G-Frame molded case circuit breakers time current curves
Series C G-Frame molded case circuit breakers time current curves
Series C G-Frame molded case circuit breakers time current curves
Series C G-Frame molded case circuit breakers time current curves
Series C G-Frame molded case circuit breakers time current curves
Three-pole protection in the MDLB3500 within the MDL frame provides consistent three-phase interruption, reducing damage from line faults and improving equipment uptime. The 500 A amperage rating aligns with heavy-load feeders, enabling precise coordination with upstream protection while minimizing nuisance trips in demanding motor and process circuits. The fixed thermal and fixed magnetic trip design delivers stable response across a wide temperature range, supporting predictable coordination with other protective devices on the bus. The unit’s high interrupt ratings—65 kAIC at 240 VAC and 50 kAIC at 480 VAC—allow it to withstand substantial fault currents typical of industrial facilities without compromising safety. Series C MDL architecture ensures compatibility with existing panels and accessory ecosystems, including StrandAble terminals for fast, reliable terminations. Installation benefits include straightforward wiring, reduced commissioning time, and easier spare-part management due to complete breaker assemblies. UL Listed certification underpins regulatory compliance, while the one-year warranty minimizes lifecycle risk for new installations and retrofits. With 50/60 Hz compatibility and a fixed magnetic trip, this breaker is well-suited for global manufacturing environments seeking robust protection with long-term serviceability.
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FAQs
The MDLB3500 is designed for the MDL frame and Series C architecture. Begin by de-energizing the panel, verify correct bus bar alignment, and use compatible StrandAble terminals for terminations. The fixed thermal and magnetic trip simplifies wiring since the device ships as a complete breaker assembly. Follow Eaton installation guidelines from the Series C documentation to ensure proper mounting, torque, and clearance, then perform a functional test after wiring.
Key specs include a 500 A amperage rating, triple-pole configuration, 50/60 Hz operation, and interrupt ratings of 65 kAIC at 240 VAC and 50 kAIC at 480 VAC. Trip type is T186, with fixed thermal and fixed magnetic protections. The product is UL Listed and intended for use in Series C MDL-frame installations, making it suitable for high-demand industrial feeders and motor circuits.
Yes. With a 500 A rating and high interrupt ratings (65 kAIC at 240 VAC / 50 kAIC at 480 VAC), the MDLB3500 is appropriate for motor feeders and demanding loads in industrial settings. Its fixed trip design provides predictable protection under motor starting transients, while the three-pole arrangement ensures balanced shutdown across all phases.
The MDLB3500 is UL Listed, confirming compliance with recognized safety standards for molded case circuit breakers. This certification supports regulatory acceptance, reduces risk during audits, and helps ensure safe integration with other UL-listed components in panel assemblies.
Eaton provides a warranty described as 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This warranty, combined with Eaton’s service centers and documentation, helps minimize lifecycle risk and supports fast, reliable maintenance or retrofit projects.