Eaton KD3250S31 250A 3-Pole 600 V Circuit Breaker

Eaton KD3250S31 250A 3-Pole 600 V Circuit Breaker delivers reliable overcurrent protection for three‑phase electrical systems, guarding motors, feeders and critical loads up to 600 volts. Built to handle demanding industrial and commercial environments, this breaker ensures safe, predictable disconnection when faults occur.

What makes this model stand out

• Three-pole design for balanced protection—simultaneous isolation of all three phases prevents phase imbalances and reduces the risk of damage to motors and equipment.
• High current handling—250 A rating makes it suitable for protecting large motors, heavy feeders, and substantial distribution circuits.
• Voltage capacity up to 600 V—designed for typical industrial power networks, offering solid protection across a range of applications.
• Part of Eaton’s KD-series—designed for compatibility with existing KD-series panels and accessories, enabling straightforward replacements and coordinated protection strategies.

Ideal applications

• Industrial motor circuits (pumps, conveyors, industrial fans, compressors) requiring dependable 3‑phase protection.
• Three‑phase feeders and bus connections in commercial distribution panels and switchgear.
• System upgrades where higher current protection is needed without adding multiple single-pole devices.

How this protects your system

The KD3250S31 intercepts overcurrent events in three-phase circuits, helping prevent insulation damage, conductor overheating, and motor burnout. By providing a clear, fast disconnection path at the point of fault, it supports safer operation, reduces downtime, and simplifies maintenance planning for mid-to-large electrical installations.

Specifications at a glance

• Part Number: KD3250S31
• Current rating: 250 A
• Poles: 3
• Voltage rating: 600 V
• Product family: Eaton KD-series circuit breakers

Practical tips

• Use as the primary overcurrent protection for 3‑phase feeders and motor circuits within compatible Eaton panels or enclosures.
• Coordinate with upstream protection to achieve appropriate fault clearance times for your load profile.
• Keep a compatible spare KD-series breaker on hand to minimize downtime during maintenance or panel upgrades.
• Follow local electrical codes and manufacturer guidelines during installation and replacement to ensure safe, compliant operation.