Westinghouse | LA3100 | Circuit Breaker | 100A | 3-Pole | 600V | 30kA | Bolt-On

Westinghouse LA3100 Circuit Breaker — a purpose-built safeguard for your electrical system, designed to fit into panels and enclosures that require a bolt-on, three-pole 100-amp device. With a 600V rating and a 30kA interrupting capacity, this LA3100 model delivers dependable protection for demanding industrial and commercial applications while simplifying retrofit and maintenance projects.

Key specifications

• Amperage: 100A
• Poles: 3-Pole
• Voltage: 600V
• Interrupting rating: 30kA
• Mounting: Bolt-On

Why choose the Westinghouse LA3100?

The LA3100 is more than just a breaker — it’s a plug-in solution for panels that require a bolt-on, three-pole design. Its 100-amp capability makes it a fit for main protection in medium-duty electrical systems, while the 600V rating covers a broad range of industrial and commercial circuits. The robust 30kA short-circuit current rating helps maintain system integrity during fault conditions, giving operators peace of mind in environments where uptime matters.

What makes it unique

• Bolt-On mounting simplifies installation and replacement in compatible enclosures, providing a secure, vibration-resistant connection that’s ideal for environments with frequent thermal cycling or equipment vibration.
• Three-pole configuration offers balanced protection across all phases in a three-phase system, ensuring coordinated tripping and avoiding unequal phase loading.
• Standard 600V operating range supports a wide array of control circuits and power distribution applications, enabling versatile use in both new installations and panel upgrades.
• Clear compatibility reference with part number LA3100 ensures you’re selecting the right device for your panel or enclosure—minimizing guesswork during maintenance or retrofit.

Ideal use scenarios

• Maintenance and replacements in older or upgraded panels that require a bolt-on, 3-pole 100A protection device with a high interrupting rating.
• Retrofit projects when upgrading circuits to meet current safety standards while preserving existing wiring and enclosure footprints.
• New installations in commercial or light-industrial panels where a 600V, 3-pole, bolt-on breaker is the right fit for protecting three-phase loads.

Practical considerations for buyers

Before you place an order, confirm the fit and ratings for your specific enclosure. The part number LA3100 is the best reference for compatibility, helping you avoid mismatches with mounting holes, latching mechanisms, and terminal configurations. If you’re upgrading or replacing a breaker, compare the physical footprint and mounting style to ensure a seamless swap without panel modification.

Tips for installation and long-term reliability

• Plan a brief shutdown and lockout/tagout procedure to protect personnel and equipment during replacement or retrofit.
• Verify that wiring terminals and conductor sizes match the device specifications to maintain secure, low-resistance connections.
• Set expectations for coordinated protection: with a three-pole design, ensure the associated control circuits are compatible with three-phase protection schemes to prevent nuisance trips.
• Store and handle the unit in clean, dry conditions prior to installation to preserve contact surfaces and mounting integrity.

The Westinghouse LA3100 circuit breaker is crafted for reliability in panels and enclosures that demand robust, bolt-on protection. Its 100A rating, three-pole configuration, and 600V capability make it a practical choice for maintenance-led refreshes, retrofit projects, and new installations where precise compatibility and solid performance matter most. When in doubt, rely on the part number LA3100 as your definitive reference to ensure a precise match for your system’s protection needs.