Siemens HED41B040 - 40 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HED41B040 is a purpose-built 40A, 277V, 1-pole bolt-on molded case circuit breaker crafted to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built to endure the demands of modern electrical rooms, this breaker combines robust construction with precise trip performance to keep wiring and equipment safe while minimizing nuisance trips.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection. In busy panels where doors are opened and closed and equipment hums nearby, the secure mounting helps maintain reliable contact and consistent protection.
• Thermal-magnetic trip unit delivers stable, repeatable protection against both sustained overloads and short circuits. You get predictable trips that align with the circuit’s actual loading, reducing unexpected outages.
• 277V single-pole design is purpose-built for commercial lighting circuits and other 277V applications, making it an ideal choice for office buildings, retail spaces, and light industrial environments.
• 40A, 1-pole configuration offers targeted protection for individual branch circuits, allowing precise control of protection levels without unnecessary disruption to neighboring circuits.
• Molded-case construction combines durability with heat tolerance, helping the breaker withstand cycling and long service life in demanding panels.
• OEM compatibility designed to fit seamlessly with matching Siemens load centers and panelboards, ensuring clean fit, proper trip characteristics, and straightforward integration into existing systems.

Ideal use scenarios

Consider the Siemens HED41B040 for environments where 277V distribution is standard and reliable single-pole protection is needed. It shines in:

• Commercial lighting circuits in offices, schools, and retail spaces requiring consistent overcurrent protection at 277V.
• Small-to-mid sized panelboards in light industrial settings where dedicated protection for individual branches is essential.
• Retrofitting or upgrading Siemens OEM panels that call for a 1-pole, bolt-on 40A breaker with a thermal-magnetic trip profile.

Technical snapshot

• Manufacturer: Siemens
• Part number: HED41B040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40A
• Voltage rating: 277V
• Poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the Siemens HED41B040 means opting for a trusted solution that aligns with Siemens’ panelboard ecosystems, delivering precise protection for critical circuits while simplifying installation and maintenance in commercial and light-industrial settings. If you’re upgrading an OEM panel or configuring a new 277V distribution, this 1-pole bolt-on breaker provides the reliable performance you expect from Siemens, with the flexibility to fit your specific load-center lineup.