KD3250 - 250Amp Circuit Breaker

KD3250 - 250Amp Circuit Breaker

When you need a KD3250, the catalog number is only the beginning of the match. This is a 250-amp, three-pole Series C molded-case circuit breaker built on a K-frame and supplied as a complete breaker. It uses the Type KD configuration with a T186 trip type, operates at 50–60Hz, and is rated for 600 VAC and 250 VDC. Those details are worth checking individually, especially when you're keeping existing or legacy electrical equipment in service. A breaker can have the right amperage and still be wrong for the application because of its frame, trip type, dimensions, voltage rating, or terminal configuration. When the complete KD3250 specifications line up with the equipment requirements, it can provide the form, fit, and function needed for the replacement.

Key Features and Benefits

• 250A, three-pole breaker: Designed for applications calling for this specific amperage and pole configuration.
• Complete K-frame breaker: Supplied as a complete molded case circuit breaker, an important distinction when identifying the required replacement.
• Series C, Type KD configuration: Helps narrow the match when working with existing equipment that calls for this breaker type.
• T186 trip type: Another key specification to compare with the breaker being replaced.
• 600VAC and 250VDC rated: Gives electricians and maintenance teams clear voltage specifications to work from.
• Aluminum line and load terminals: Connection configuration and terminal material are specified rather than left to guesswork.
• 50–60Hz frequency rating: Suitable where the equipment requirements correspond with this frequency range.
  

Technical Specifications

• Catalog Number: KD3250
  
• Product Name: Series C Complete Molded Case Circuit Breaker
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Series C
  
• Circuit Breaker Type: KD
  
• Frame: K
  
• Frame Type: Complete Breaker
  
• Amperage Rating: 250A
  
• Poles: 3
  
• Voltage Rating: 600VAC, 250VDC
  
• Trip Type: T186
  
• Interrupt Rating at 480VAC: 35k AIC
  
• Interrupt Rating at 240VAC: 65k AIC
  
• Frequency: 50–60Hz
  
• Terminals: Line and Load
  
• Terminal Material: Aluminum
  
• Width: 5.5 in.
  
• Height: 5.5 in.
  
• Length/Depth: 4.1 in.
  
• Product Weight: 11.5 lbs.
  
• UPC: 786679349168
  
• Certification: UL Listed
  

Material Compliance and Certifications

The supplied specifications identify the KD3250 as UL Listed. They also specify aluminum as the material used for its line and load terminals.

Other material-compliance information, including RoHS or REACH status, wasn't provided in the available specifications, so those designations shouldn't be assumed. If a project calls for a particular material standard or certification, check the breaker markings and applicable product documentation before installation.

Where It Works Best

The KD3250 makes sense for existing and legacy electrical equipment that specifically calls for a 250A, three-pole Series C Type KD breaker with a K frame and T186 trip type. That's a much more useful way to approach replacement work than searching by amperage alone.

First, compare the electrical requirements. The KD3250 is rated 600VAC and 250VDC, operates at 50–60Hz, and carries interrupting ratings of 35k AIC at 480VAC and 65k AIC at 240VAC.