{"product_id":"siemens-hed43b050-50a-480v-3-pole-bolt-on-circuit-breaker","title":"Siemens HED43B050 - 50 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003eSiemens HED43B050 - 50A, 480V, 3-Pole Bolt-On Molded Case Circuit Breaker Engineered for dependable branch circuit protection in panelboards and load centers, the Siemens HED43B050 delivers precise, repeatable protection when it matters most. This 50 amp, 480-volt, 3-pole bolt-on circuit breaker is built to withstand the demands of modern electrical systems in residential, commercial, and light industrial settings, offering a robust solution for overcurrent and short-circuit protection. Key features that set this unit apart\n- Secure bolt-on mounting for a rigid, vibration-resistant bus connection, reducing connector movement that can lead to loose terminations or nuisance trips.\n- Thermal-magnetic trip unit delivers stable, repeatable protection by combining instantaneous short-circuit response with accurate overload sensing, helping to prevent damage to downstream equipment.\n- OEM-compatible design intended to pair seamlessly with matching Siemens load centers and panelboards, simplifying replacement and upkeep.\n- Three-pole configuration ideal for 3-phase systems, compatible with a wide range of commercial and light industrial applications.\n- 480V voltage rating and 50A current rating provide reliable protection for mid-range branch circuits while maintaining safe installation margins. Why this matters for your electrical protection\n- Precision protection: The thermal-magnetic trip mechanism responds quickly to short circuits while delivering consistent overload protection, reducing the risk of overheating and electrical fires.\n- System integrity: Bolt-on mounting creates a solid, vibration-resistant connection to the bus, maintaining electrical continuity even in environments with movement or vibration.\n- Longevity and compatibility: Designed to work with Siemens OEM panelboards and load centers, this breaker minimizes compatibility concerns and supports straightforward field replacement.\n- Versatility across applications: Whether updating a commercial panelboard, renovating a residential service to support a small business, or equipping a light industrial distribution panel, this 3-pole unit provides reliable three-phase protection where needed. Who benefits most\n- Electrical contractors and field technicians performing panelboard upgrades, replacements, or new installations that require Siemens OEM compatibility.\n- Facility managers overseeing commercial spaces, multifamily buildings, or light industrial facilities where reliable 3-phase protection is essential.\n- Electrical engineers specifying protection criteria for mid-range branch circuits in 480V systems. Use cases and scenarios\n- Replacing a failed 3-pole breaker in a Siemens panelboard where a 480V, 50A 3-phase circuit exists.\n- Upgrading a panel to accommodate higher fault current levels while maintaining stable protection characteristics in a commercial installation.\n- Integrating into a new 3-phase distribution layout in light industrial environments that demand dependable short-circuit response and controlled tripping behavior. Practical considerations and tips\n- Verify system compatibility: Ensure your panelboard is designed to accept bolt-on molded case breakers of the HED43B050 family and that the 480V\/50A ratings match your circuit requirements.\n- Installation best practices: Follow torque specifications for the mounting bolts to secure the breaker firmly to the bus bars, mitigating vibration-related loosening over time.\n- Coordination and protection strategy: Pair this breaker with upstream protection devices and ensure proper breaker sizing to achieve selective coordination and fault isolation.\n- Safety first: De-energize equipment and follow all applicable electrical codes and safety standards during installation or replacement. Technical snapshot\n- Manufacturer: Siemens\n- Part Number: HED43B050\n- Type: Thermal-magnetic molded case circuit breaker\n- Amperage Rating: 50A\n- Voltage Rating: 480V\n- Number of Poles: 3\n- Mounting Style: Bolt-on\n- Application: Branch circuit overcurrent and short-circuit protection This Siemens HED43B050 bolt-on circuit breaker is a purpose-built solution for reliable, code-compliant protection in panelboards and load centers. If you need a robust 3-pole, 480V breaker that delivers consistent trip performance, solid mounting, and compatibility with Siemens OEM systems, this unit is designed to meet those needs with confidence.\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349801586850,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_1f1dc77e-0d3a-47d0-96b1-48d21cd170d5.png?v=1764157214","url":"https:\/\/www.ampstate.com\/products\/siemens-hed43b050-50a-480v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}