Siemens HED41B020 - 20 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HED41B020 is a 20A, 277V, 1-pole bolt-on molded case circuit breaker designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to fit seamlessly into Siemens ecosystems, this device delivers precise protection where it matters most — in commercial, residential, and light industrial electrical distributions.

Secure, vibration-resistant mounting

With a dedicated bolt-on mounting design, the HED41B020 creates a rigid bus connection that stays put even in environments with vibration or heavy equipment. This robust mounting reduces connection drift over time, helping maintain reliable protection and minimizing nuisance trips caused by loose terms or arcing at the bus.

Thermal-magnetic protection you can trust

The integrated thermal-magnetic trip unit delivers stable, repeatable protection performance. It responds to sustained overloads with gentle, predictable tripping and instantly interrupts on short circuits for fast, effective isolation of faulted circuits. This dual-action protection helps safeguard wiring and connected loads without compromising normal operation.

Designed for Siemens panel ecosystems

Specifically engineered to be compatible with matching OEM load centers and panelboards, this 1-pole bolt-on breaker ensures a precise fit and consistent electrical characteristics within your distribution system. Ideal for panel upgrades, maintenance, or new installations where Siemens compatibility matters.

Key specifications

• Amperage rating: 20A
• Voltage rating: 277V
• Poles: 1
• Mounting style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Part number: HED41B020
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and practical applications

• Protect 277V lighting circuits in commercial buildings, schools, or offices where reliable, instantaneous fault isolation matters.
• Upgrade or replace aging breakers in panelboards and load centers that require a Siemens-compatible bolt-on solution.
• Support small to mid-size electrical distributions in light industrial environments where robust, vibration-resistant connections are beneficial.

Why this breaker stands out

• Real-world reliability: A secure bolt-on mount minimizes movement and connection wear, supporting long-term performance in demanding installations.
• Precise protection: Thermal-magnetic trip technology delivers predictable response to overloads and short circuits, helping protect wiring and equipment.
• Seamless integration: Engineered to pair with Siemens OEM load centers and panelboards for a cohesive, code-compliant distribution system.

If you’re stocking a Siemens-based electrical distribution setup that demands dependable overcurrent protection for 277V circuits, the Siemens HED41B020 delivers a focused, durable solution. Its combination of secure mounting, precise thermal-magnetic protection, and OEM-compatible design makes it a practical choice for professional electrical installations and upgrades.