Siemens | HED43B040L | Circuit Breaker | 3-Pole | 480V

Siemens HED43B040L is a 3-pole circuit breaker designed for 480V three-phase electrical systems. This original Siemens component is ideal for maintenance, retrofit, and replacement projects where exact compatibility matters, helping you preserve precise protection coordination and system reliability.

• Poles: 3-Pole
• Voltage rating: 480V
• Part number: HED43B040L (the best reference for compatibility)
• Typical applications: maintenance, retrofit, and replacement in 3-phase panels and distribution systems
• Key note: Confirm fit and ratings before ordering to ensure seamless integration

Why this breaker stands out for your 3-phase protection needs

The Siemens HED43B040L brings a precise, Siemens-engineered solution to systems that demand exact part matching. By using the exact part number, you minimize compatibility risks and maintain the intended trip characteristics across all three phases. This is especially important in industrial environments where downtime is costly and protective coordination with upstream devices matters for safety and reliability.

Ideal use cases

Use this breaker when you need a reliable, drop-in solution for:

• Routine maintenance on 3-phase equipment in manufacturing, processing, or distribution settings
• Retrofits that require matching Siemens specifications to upgrade protection and control schemes
• Replacement of aging or failed breakers in 480V panels where an exact HED43B040L reference is specified

Installation and practical considerations

Before purchasing, verify that the HED43B040L matches your panel’s catalog and the system’s 480V rating. If in doubt, consult your electrical drawings or contact your Siemens distributor to confirm fit, ratings, and compatibility with surrounding protection devices. This approach helps ensure smooth installation, proper trip coordination, and continued safety of your three-phase electrical distribution.

What to expect in operation

Once installed, you gain the confidence of a trusted Siemens design, designed to align with standard three-phase protection expectations in 480V environments. It’s a practical choice for technicians prioritizing exact part reference, straightforward replacement, and dependable performance within Siemens-compatible panels.