Westhinghouse KA3125 - 125A, 3-Pole, Circuit Breaker

The Westhinghouse KA3125 is a rugged 125A, 3-Pole circuit breaker designed to deliver dependable overcurrent protection in three-phase power systems. Built for industrial, commercial, and OEM environments, it helps safeguard distribution infrastructure and critical equipment in panelboards, switchboards, and control panels.

Key advantages you’ll feel in real-world use

• Reliable 125A protection ensures that circuits stay within safe current limits, reducing the risk of damage from overloads in demanding environments.
• 3-Pole configuration provides synchronized protection across all three phases, making it ideal for balanced three-phase systems used in motors and heavy loads.
• Versatile installation compatible with standard panelboards, switchboards, and motor control centers, enabling streamlined integration into existing or new power distribution setups.
• Industrial-grade performance designed to withstand the rigors of demanding commercial and manufacturing settings, delivering consistent operation when it matters most.

Who benefits from the KA3125

• Facilities managers and electrical engineers overseeing power distribution in factories, warehouses, and large commercial facilities.
• OEM designers integrating reliable protection into equipment housings, control panels, and modular systems.
• Technicians seeking a durable, straightforward solution for three-phase protection in distribution panels.

Use cases and scenarios

• Protecting motors and motor control centers in 3-phase systems where sudden faults or overloads can cause expensive downtime.
• Providing centralized overcurrent protection in panelboards and switchboards that service multiple process lines.
• Serving as a dependable, drop-in replacement or upgrade in existing electrical distribution setups needing robust 125A protection.

Key specifications at a glance

• Current rating: 125A
• Poles: 3-Pole
• Type: Circuit Breaker
• Applications: Industrial, commercial, and OEM environments requiring dependable overcurrent protection

Why this matters

In any distribution system, protecting conductors and connected equipment from overloads is critical to prevent insulation damage, unplanned downtime, and costly repairs. The KA3125 delivers straightforward, three‑phase protection that aligns with typical electrical layouts in panelboards, switchboards, and motor control centers, helping you maintain smooth operations and safer facilities.

Practical tips for deployment

• Match the KA3125’s 125A rating to the service capacity of your three-phase feeders to ensure appropriate protection without nuisance trips.
• Use in panelboards or switchboards where simultaneous protection of all three phases is required for balanced load handling.
• Coordinate with other protective devices in your distribution scheme to maintain selective protection and minimal outage impact.