Eaton ND312T33W - 1200 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Designed for demanding electrical environments, the Eaton ND312T33W delivers robust branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. With a 1200A rating and 600V capacity, this three-pole bolt-on breaker is built to endure the rigors of residential, commercial, and light industrial applications while delivering dependable protection when it matters most.

Key benefits that matter in the field

• Secure bolt-on mounting—a rigid, vibration-resistant bus connection that stays put in panels exposed to vibration, temperature swings, and frequent power cycling.
• Thermal-magnetic trip unit—provides stable, repeatable protection performance by reacting predictably to both gradual overloads and sudden short-circuit faults.
• OEM-compatible installation—designed to work with matching OEM loadcenters and panelboards for straightforward upgrades, replacements, or new installations.
• Three-pole design—ideal for three-phase systems common in commercial and light industrial setups, ensuring balanced protection across all phases.

What problems does it solve?

• Prevents damage to wiring, devices, and equipment by interrupting fault currents quickly and reliably.
• Eliminates unreliable connections that can lead to nuisance trips or arcing, thanks to its secure bolt-on bus interface.
• Reduces maintenance uncertainty in panel installations that face vibration, humidity, and temperature fluctuations.

Who should consider this breaker?

• Electrical contractors performing panelboard upgrades or replacements in commercial spaces and light industrial facilities.
• Residential buildings with high-amp, three-phase needs or service panels requiring robust overcurrent protection.
• Facilities seeking a compatible, long-lasting bolt-on solution that aligns with OEM panelboards and loadcenters.

Specifications at a glance

• Manufacturer: Eaton
• Part number: ND312T33W
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 1200A
• Voltage rating: 600V
• Number of poles: 3 (three-pole)
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters

Practical tips for best results

• Verify panelboard compatibility with the ND312T33W’s bolt-on mounting and three-pole configuration before installation.
• Use the correct torque on mounting hardware to maintain a secure, vibration-resistant connection and prevent loosening over time.
• Coordinate protection with circuit sizing and conductor ratings to ensure full compliance with local codes and standards.
• Label protective devices clearly in the panel for easy maintenance and rapid fault isolation.

For reliable, high-capacity protection in demanding panelboard environments, the Eaton ND312T33W stands out as a purpose-built, three-pole bolt-on solution that aligns with OEM equipment while delivering consistent, dependable performance in residential, commercial, and light industrial applications.