Siemens | E43B040 | Circuit Breaker | 40A | 480V | 18kA | Bolt-On

Siemens E43B040 Circuit Breaker — a precise 40A, 480V bolt-on protection device purpose-built for demanding industrial environments. With an 18kA interrupting capacity, this breaker is ready to safeguard critical equipment in retrofit, maintenance, and replacement projects where exact specs matter.

Key specifications at a glance:

• Amperage: 40A
• Voltage: 480V
• Interrupting capacity: 18kA
• Mounting: Bolt-On
• Part number: E43B040

Why this Siemens breaker stands out for serious electrical systems:

• Exact-fit compatibility: Rely on the part number E43B040 as the best reference for ensuring the right replacement or retrofit in compatible Siemens panels.
• Fast, secure installation: Bolt-On mounting simplifies field service, enabling solid mechanical and electrical connections with minimal downtime.
• High fault-current protection: The 18kA interrupting rating provides robust protection against high-energy faults common in industrial networks.
• Designed for 480V circuits: Ideal for industrial distribution, motor feeders, and equipment protection in facilities powered by 480-volt electrical systems.

Who benefits most from the E43B040:

• Maintenance teams performing panel retrofits or replacements in existing Siemens installations.
• Industrial facilities upgrading protection for 480V distribution and motor circuits.
• OEMs and integrators seeking reliable, field-friendly bolt-on breakers with precise specifications.

Practical considerations when ordering:

• Always confirm fit and ratings before ordering. The part number is the best reference for compatibility with your panel.
• Use in applications designed for bolt-on breakers and ensure the panel can accommodate the E43B040 configuration.

In short, the Siemens E43B040 delivers dependable protection for 40A, 480V circuits with strong fault-current handling, wrapped in a bolt-on design tailored for efficient field service and precise compatibility. This is a purpose-built solution for engineers and technicians who demand exact specifications and minimal downtime in industrial settings.