Siemens | HE43B020 | Circuit Breaker | 20A | 3-Pole | 480V | 25kA | Bolt-On

Siemens HE43B020 Circuit Breaker—a precise, bolt-on solution for 20A, 3-Pole protection in 480V industrial networks. Built for maintenance, retrofit, and replacement, this breaker delivers dependable overcurrent protection in demanding environments, helping you keep critical equipment running with minimal downtime.

• Amperage: 20 A
• Poles: 3-Pole
• Voltage: 480 V
• Interrupting Capacity: 25 kA
• Mounting: Bolt-On
• Part Number: HE43B020

Why choose the Siemens HE43B020 for your facility: - Precise compatibility: This part is explicitly identified by the HE43B020 number, making cross-reference and panel matching straightforward for Siemens-equipped systems. For the best fit, rely on the part number as the compatibility reference. - Quick, field-ready installation: Bolt-on mounting is designed for fast field swaps, reducing panel downtime during retrofits or replacements without sacrificing secure, dependable fastening. - Robust protection for 480V systems: With a 25 kA interrupting capacity, this breaker is suited for high fault-current environments typical of industrial motor feeders, control circuits, and distribution panels. - Streamlined maintenance and upgrades: Ideal for retrofit projects where you’re updating legacy gear or replacing aging protection devices, helping you standardize protection across your 480V infrastructure. This breaker is ideal for: - Plant engineers and maintenance teams performing panel retrofits or replacements in 480V networks - OEMs integrating Siemens protection into new equipment housings - Facilities upgrading motor control centers that require consistent, reliable 3-pole protection Use cases and scenarios: - Replacing a legacy 3-pole breaker in a Siemens panel with a bolt-on HE43B020 to restore original protection levels. - Retrofitting an older motor feeder circuit to accommodate higher fault-current conditions while maintaining a 20A protection rating. - Stocking a spare HE43B020 for critical 480V line feeds in manufacturing or process facilities to minimize downtime. Important note: - Confirm fit and ratings before ordering. The part number HE43B020 is the most reliable reference for compatibility with your Siemens equipment. Installation and safety tips: - Always power down and lockout/tagout the system before replacement. - Verify conductor sizing and panel rating align with 480V, 20A, and 25kA specs. - Ensure secure bolt-on seating and proper enclosure clearance to maintain panel integrity and protection performance. With Siemens HE43B020, you’re choosing a purpose-built, bolt-on circuit breaker that pairs precise electrical protection with efficient installation, tailored for high-demand 480V environments.