Siemens HEG3B020 20A 3P 600V Circuit Breaker | AmpState

Meet the Siemens HEG3B020 — a purpose-built circuit breaker designed to shield panelboards, load centers, and electrical distribution networks from overloads. This 20 A, 3-pole device delivers reliable protection in commercial and industrial applications, and it's ideal for replacement projects and stocking spares to keep your BOM aligned to the original part number. When you need to maintain system integrity without surprises, the HEG3B020 is a dependable choice.

Key specifications

• Manufacturer: Siemens
• Part number: HEG3B020
• Product type: Circuit Breaker
• Amperage: 20 A
• Poles: 3
• Voltage rating: 600 V
• Availability: AmpState

Ideal use cases

The HEG3B020 is suited for panels, distribution boards, and electrical distribution systems that require solid, dependable protection against overcurrents. Its three-pole configuration makes it well-suited for 3-phase systems, ensuring coordinated shutdowns across all conductors when fault conditions occur. Use it for:

• Replacement of failing or discontinued breakers in existing panelboards
• Stocking spares to keep construction or maintenance BOMs intact
• New installations that specify Siemens 3P 20A, 600V protection

Why this Siemens breaker stands out

Choosing the HEG3B020 means choosing alignment with Siemens’ original design intent and labeling, which helps preserve the expected trip characteristics and compatibility with standard enclosure layouts. Its 600 V rating and 3-pole, 20 A configuration provide robust protection for 3-phase circuits, reducing the risk of collateral damage in the event of an overload. By stocking this exact part, you simplify maintenance planning and ensure consistent performance across your electrical distribution network.

Compatibility and support

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Shop with AmpState to secure genuine Siemens parts like the HEG3B020 for dependable protection in panelboards, load centers, and electrical distribution systems. Available now from AmpState.