HMDL3450L - 450Amp Circuit Breaker

HMDL3450L - 450Amp Circuit Breaker

When your existing electrical system calls for a specific breaker, getting the details right matters. The Eaton HMDL3450L is a 450-amp, three-pole molded case circuit breaker from the Series C product family. Built on the MDL frame, this complete HMDL breaker features a T186 trip type and is rated for operation at 50–60 Hz. Its interrupt ratings are 100 kAIC at 240 VAC and 65 kAIC at 480 VAC. Those specifications make the HMDL3450L a practical choice for maintenance and replacement applications where the existing equipment requires this breaker type, frame, and pole configuration, as well as this electrical Rating.

Key Features and Benefits

• 450A Rating for applications designed around a 450-amp molded case circuit breaker.
• Three-pole construction matches equipment requiring this specific pole configuration.
• Part of the Eaton Series C molded case circuit breaker family.
• HMDL breaker type with MDL frame helps simplify identification when matching an existing unit.
• Uses a T186 trip type.
• Designed for 50–60 Hz electrical systems.
  

Technical Specifications

• Catalog Number: HMDL3450L
  
• Manufacturer: Eaton
  
• Product Type: Molded case circuit breaker
  
• Series: Series C
  
• Breaker Type: HMDL
  
• Frame: MDL
  
• Frame Type: Complete breaker
  
• Amperage Rating: 450 A
  
• Number of Poles: Three-pole
  
• Trip Type: T186
  
• Frequency Rating: 50–60 Hz
  
• Terminals: Includes both Line and Load lugs
  
• Interrupt Rating at 240 VAC: 100 kAIC
  
• Interrupt Rating at 480 VAC: 65 kAIC
  

Material Compliance and Certifications

The HMDL3450L is UL Listed, giving contractors, maintenance teams, and facility personnel a clearly documented certification to reference when evaluating the breaker for an application.

The supplied manufacturer information does not identify additional material-compliance certifications, so none are assumed here.

Where It Works Best

The HMDL3450L makes the most sense in existing electrical distribution equipment designed to accept an HMDL Series C breaker with an MDL frame. It's especially relevant when maintaining legacy equipment, and the goal is to replace a breaker while staying with the required form, fit, and electrical characteristics of the original application.