Siemens | JD23B400 | Circuit Breaker | 400A | 3-Pole | 240V | Bolt-On

Meet the Siemens JD23B400 Circuit Breaker — a rugged 400A, 3‑pole solution designed for demanding three‑phase systems. With a Bolt-On mounting style, it’s built for quick, secure installation in maintenance, retrofit, or replacement projects where exact specs matter.

Key specifications

• Amperage: 400A
• Poles: 3‑Pole
• Voltage: 240V
• Mounting: Bolt-On
• Part reference: JD23B400

Why this Siemens breaker stands out

Designed for reliability in industrial and commercial environments, the JD23B400 delivers robust protection for 3‑phase feeders and connected equipment. The bolt-on configuration accelerates field installation and replacement, reducing downtime and simplifying service calls. When your project calls for a precise 400A, 3‑pole, 240V solution, this breaker provides a precise fit within Siemens‑compatible panels and systems that require the JD23B400 reference.

Ideal use cases

• Maintenance swaps in existing Siemens or compatible panels that require a 400A, 3‑pole, 240V bolt-on breaker.
• Retrofit projects upgrading service feeders to handle higher load on a three‑phase distribution system.
• Replacement for a failing 400A, 3‑pole unit in industrial equipment rooms or power distribution panels.

How to verify fit and ensure safe operation

Always confirm fit and ratings against your panel’s documentation before ordering. The JD23B400 part number is the best reference for compatibility, helping you avoid mismatches in mounting style or electrical rating. If you’re upgrading or replacing, check that your panel supports bolt‑on breakers of this specification and that the service voltage matches 240V.

With the Siemens JD23B400, you gain a dependable, high‑capacity protection solution tailored for three‑phase systems, designed to simplify installation and deliver lasting performance in the field.