Eaton HKD3400 | 400A 3-Pole Series C K-Frame Molded Case Circuit Breaker

Main Description:

The Eaton HKD3400 is a Series C K-frame molded case circuit breaker engineered for heavy-duty electrical protection in demanding industrial and commercial environments. Rated at 400 amps and designed for use up to 600 VAC and 250 VDC at 50/60 Hz, this 3-pole breaker utilizes fixed thermal and fixed magnetic trip elements to deliver consistent and reliable performance. With high interrupting capabilities—including 100 kAIC at 240 VAC and 65 kAIC at 480 VAC—the HKD3400 ensures robust protection against overloads and short-circuit conditions. Its aluminum construction, complete configuration, and durable molded case design make it a dependable choice for large-scale electrical systems.

Technical Overview:

• Manufacturer: Eaton

• Brand: Cutler-Hammer

• Part Number: HKD3400

• Category: Circuit Breaker

• Subcategory: Molded Case Circuit Breaker – Series C

• Condition: New/Never Used Surplus

• Type: HKD

• Frame Type: K-Frame

• Configuration: Complete Breaker

• Poles: 3

• Amperage Rating: 400 Amps

• Voltage Rating (AC): 600 VAC Max

• Voltage Rating (DC): 250 VDC

• Frequency Rating: 50/60 Hz

• Trip Type: Fixed Thermal / Fixed Magnetic

• Interrupting Rating:

  • 100 kAIC @ 240 VAC

  • 65 kAIC @ 480 VAC

• Construction Material: Aluminum

• Application: Industrial, Commercial, Heavy-Duty Systems

• Series: Eaton Series C

• Mounting: Line and Load Terminal Configuration

Key Features:

• Fixed thermal and magnetic trip elements for reliable overload and short-circuit protection

• High interrupt ratings up to 100 kAIC for robust system safety

• Designed for 600 VAC and 250 VDC applications at 50/60 Hz

• Durable aluminum construction suitable for heavy-duty industrial environments

• K-Frame molded case design for structural strength and long-term reliability