Siemens HB1B020 20A 1P 120V Circuit Breaker, Bolt-On | AmpState

Introducing the Siemens HB1B020 20A 1P 120V Bolt-On Circuit Breaker — a precise, dependable solution designed for panelboards, load centers, and electrical distribution systems. This 1-pole breaker delivers reliable protection for branch circuits at a practical 20-amp rating and 120 volts, making it a smart choice for standard residential and light commercial applications.

What sets the HB1B020 apart is its bolt-on installation. The bolt-on design streamlines retrofit work and maintenance planning, allowing quick field swaps without altering existing mounting provisions. For projects where the part number must stay consistent, this breaker keeps replacement and service aligned with your established systems.

• Amperage: 20 A
• Poles: 1 Pole
• Voltage: 120 V
• Mounting: Bolt-On
• Manufacturer: Siemens
• Part Number: HB1B020
• Applications: Panelboards, Load Centers, Electrical Distribution

Why this matters for your retrofit and maintenance projects

When you're upgrading or maintaining a panel that relies on a consistent Siemens part number, the HB1B020 provides a reliable, compatible option that minimizes downtime. Its 1P, 120V configuration is ideal for protecting individual circuits in standard electrical distribution setups, while the bolt-on format reduces installation time and complexity during upgrades or relocations.

This breaker is particularly well-suited for contractors, facilities managers, and maintenance teams who need a dependable, readily available component that fits neatly into existing Siemens-based systems. By choosing this specific HB1B020, you’re aligning with a proven design that supports straightforward replacements and dependable circuit protection across your infrastructure.

• Ideal use cases: retrofits where preserving the original part number matters; ongoing maintenance planning; replacing a failed 20A, 1P, 120V breaker in Siemens-equipped panels.
• What it solves: reduces downtime during replacements, maintains compatibility with existing panel configurations, and simplifies inventory management for standard Siemens components.
• How AmpState helps: available now from AmpState with support to confirm fit if you’re matching a specific part number or verifying compatibility.

Ready to keep your electrical system protected with a trusted Siemens solution? AmpState has the HB1B020 in stock and ready to ship. If you need help confirming compatibility or choosing the correct part number for your panel, send a message and we’ll assist with fit verification.