Siemens | SJD69400NT | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Siemens SJD69400NT circuit breaker — a high-capacity, three-pole protection device designed for demanding electrical systems. With a 400A rating and a 600V maximum, this breaker delivers dependable overcurrent protection for main feeders, switchgear, and critical circuits in commercial and industrial environments. Built to align with precise specifications, it’s the smart replacement choice when exact compatibility matters.

• Amperage: 400A
• Poles: 3-Pole
• Voltage rating: 600V
• Applications: maintenance, retrofit, and replacement where matching specs are required
• Compatibility reference: best matched by part number SJD69400NT

Why this configuration matters: a 3-pole design ensures balanced protection across all phases, helping prevent unbalanced loads that can stress wiring and equipment. The 600V rating accommodates a wide range of industrial circuits, while the 400A capacity supports heavy-duty feeders when paired with appropriate conductors and panel arrangements. This makes the SJD69400NT a proactive choice for upgrading or sustaining demanding electrical installations.

Ideal use scenarios include:

• Installing during facility maintenance to replace aging breakers with a Siemens-certified solution
• Retrofit projects where your system requires exact 400A, 3-Pole, 600V specifications
• Replacement of failed or obsolete breakers to restore reliable protection and maintain code compliance

How to confirm fit before ordering: rely on the SJD69400NT part reference as the clearest indicator of compatibility. Always verify the panel labeling and service ratings in your equipment manual to ensure safe, code-compliant installation. When in doubt, consult a licensed electrician to match this 400A, 3-Pole, 600V Siemens circuit breaker to your specific panel and application.