Siemens | JXD23S400AL | Circuit Breaker | 400A | 3-Pole | 240V

Introducing the Siemens JXD23S400AL circuit breaker—a high-capacity, 3-pole protection device designed for demanding electrical systems. Rated for 400A at 240V, it provides reliable overcurrent protection for main feeders and service disconnects in commercial and industrial panel environments. This unit is intended for maintenance, retrofit, and replacement projects where exact specifications matter and only a like-for-like part will do.

Key specifications at a glance

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 240V
• Part reference: JXD23S400AL

Why this Siemens circuit breaker stands out

Designed to integrate seamlessly with Siemens panels and enclosures, the JXD23S400AL minimizes compatibility risk and simplifies replacement workflows. Its three-pole configuration ensures balanced protection across all phases in 240V systems, promoting stable operation of large-load circuits without compromising safety. Built for scenarios where high current protection is non-negotiable, it supports reliable interruption during overloads and short circuits, helping safeguard both equipment and personnel.

Ideal use cases

• Replacing a failed main or feeder breaker in commercial or light industrial panels that require 400A, 3-pole, 240V protection.
• Retrofit projects where exact Siemens specifications are essential to maintain panel coordination and warranty coverage.
• New installations in facilities with substantial electrical loads that demand robust, code-compliant protection.

Installation and compatibility guidance

Best reference for compatibility: the part number JXD23S400AL. Before ordering, confirm fitment with your specific panel make, model, and voltage requirements to avoid misfits. This part is intended for professional installation to ensure proper torque, alignment, and protective coordination.

What problems this solves

By delivering a like-for-like replacement with exact ratings, this Siemens circuit breaker reduces downtime and eliminates guesswork during maintenance or retrofits. It ensures you preserve the intended protection scheme of your existing system, supporting safer, more reliable operation of high-current circuits.