Cutler-Hammer | NDC312T33W | Circuit Breaker | 1200A | 3-Pole | 600V

The Cutler-Hammer NDC312T33W is a high-capacity three-pole circuit breaker engineered for demanding industrial environments. With a 1200 A rating and a 600 V maximum, this protective device is purpose-built for heavy-load panels, switchgear, and distribution gear where reliable overcurrent protection matters most. Designed for maintenance, retrofit, and replacement projects, it helps keep critical equipment online by delivering precise, dependable interruption when faults occur.

Key specifications

• Amperage: 1200 A
• Poles: 3-Pole
• Voltage: 600 V
• Brand/Part: Cutler-Hammer NDC312T33W

What makes this breaker stand out

This unit combines the trusted engineering of Cutler-Hammer with a design optimized for high-current, three-phase protection. Its 1200 A capacity supports large feeders and main-distribution paths, reducing the risk of nuisance trips in demanding lines. The 600 V rating positions it well for medium-voltage, three-phase applications where safety margins and robust fault interruption are non-negotiable. When you need a dependable retrofit or replacement, choosing the exact part number—NDC312T33W—ensures compatibility and minimizes commissioning time.

Ideal use cases

• Maintenance replacements in legacy industrial panels where a 3-pole, 1200 A unit is required
• Retrofits and upgrades in manufacturing lines, data-center utility rooms, or large machine rooms
• New installations that call for a three-phase, 600 V protective device with high current capacity

Buying with confidence

Important: Confirm fit and ratings before ordering. The NDC312T33W part number is the best reference for compatibility with compatible Cutler-Hammer panels and switchgear. Review your equipment catalog or contact your distributor to verify that this exact model matches your panel’s specifications and bus/bar dimensions.

Installation and practical tips

• Ensure the panel and associated wiring are rated for 1200 A and 600 V before installation.
• Follow all lockout/tagout and safety procedures to safely de-energize equipment prior to replacement or retrofit.
• Cross-check the exact part number (NDC312T33W) against your panel’s documentation to avoid compatibility issues.
• Keep a copy of the manufacturer’s installation guidance handy during commissioning for proper alignment and connection practices.