Siemens | HE43B090 | Circuit Breaker | 90A | 3-Pole | 480V | Bolt-On

Siemens HE43B090 Circuit Breaker is a robust, bolt-on protection device engineered for demanding 3-phase power systems. With a 90 A rating across three poles and a 480 V operating range, this unit delivers reliable overcurrent protection for industrial distribution panels where precise, dependable performance is essential.

• Amperage: 90 A
• Poles: 3-Pole
• Voltage: 480 V
• Mounting: Bolt-On
• Part Number: HE43B090
• Applications: maintenance, retrofit, and replacement in compatible Siemens systems
• Compatibility Note: Confirm fit and ratings before ordering. The part number is the best reference for compatibility.

Why this bolt-on breaker stands out

• Seamless integration with compatible Siemens panels: Designed to complement existing 3-phase, 480 V distribution setups while maintaining consistent protection strategies.
• Three-pole protection for balanced circuits: Ensures synchronized shutdown across all phases, which is crucial for equipment with three-phase motors and drives.
• Efficient installation: Bolt-On mounting simplifies field servicing and replacement, reducing downtime during maintenance or retrofits.
• Clear, reference-driven compatibility: The HE43B090 part number serves as the primary guide for ensuring exact fit within your system.

Ideal use cases

• Maintenance on aging or mission-critical 3-phase 480 V electrical distributions where reliability is non-negotiable.
• Retrofit projects to upgrade panels with a standard 90 A, 3-pole, 480 V protection device from Siemens.
• Replacement of failed or discontinued breakers in compatible Siemens equipment, helping you restore protective performance quickly.

Practical tips for getting the best results

• Always verify fit and ratings before ordering by cross-checking the part number HE43B090 with your panel’s documentation.
• Prepare your installation with the correct mounting hardware and ensure the panel is de-energized before removal or installation to maintain safety.
• Document the replacement reference in your maintenance logs to simplify future servicing and part sourcing.
• Use this breaker specifically in systems that require 3-pole, 480 V protection to maintain proper coordination with adjacent protective devices.

Designed for reliability in industrial environments, the Siemens HE43B090 bolt-on circuit breaker provides dependable, three-phase protection that aligns with existing Siemens equipment while offering a straightforward path for maintenance, retrofit, and replacement projects. Rely on the part number HE43B090 as your primary compatibility reference to ensure a precise, hassle-free match for your 3-pole, 480 V distribution needs.