Siemens J6N1 400A 3P 600V Circuit Breaker, NEMA 1 | AmpState

The Siemens J6N1 400A 3P 600V circuit breaker is engineered to deliver dependable overcurrent protection for indoor electrical distributions. Designed for panelboards, load centers, and general electrical distribution, this NEMA 1-rated device keeps three‑phase systems safe and running smoothly in industrial and commercial environments.

What sets the J6N1 apart is its exact part-number integrity. For maintenance teams, panel builders, and spare inventory, a direct part-number match minimizes downtime and rework by ensuring immediate compatibility with your existing Siemens installations. With a robust 400 A rating across 3 poles and a 600 V operating capability, it handles demanding 3‑phase feeders with confidence.

Key specifications

• Manufacturer: Siemens
• Part Number: J6N1
• Product Type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Voltage: 600 V
• Enclosure: NEMA 1
• Availability: AmpState

Ideal use cases

• Panelboards and load centers requiring reliable 3‑phase protection
• Electrical distribution systems in industrial facilities and commercial environments
• Spare inventory for maintenance programs to ensure quick, direct-part replacements

Need help matching a part number or confirming compatibility with your current setup? Message us and we’ll help you verify fit and ensure a seamless replacement for your Siemens J6N1 circuit breaker.

Choose the Siemens J6N1 400A 3P 600V for accurate cross-reference, dependable protection, and a straightforward path to sustaining uninterrupted electrical distribution. Available from AmpState, it’s a practical, ready-to-use solution when the exact part-number match matters most.