{"product_id":"siemens-he42b020","title":"Siemens HE42B020 20A 2-Pole 480 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens HE42B020 is a robust 20A, 2-pole, 480 V circuit breaker designed to protect industrial and commercial electrical systems. With the part number HE42B020, this breaker fits Siemens panels and other compatible distribution boards, delivering reliable overcurrent protection where it matters most.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhat it is and how it works\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a two-pole device that interrupts both hot legs in a 480 V circuit, providing synchronized disconnection during overloads or faults. The \u003cstrong\u003e20 A\u003c\/strong\u003e current rating ensures circuits stay within safe limits, while the \u003cstrong\u003e480 V\u003c\/strong\u003e rating covers high-voltage applications typical in industrial environments. In short, it helps prevent wiring damage, protects motors and controls, and reduces the risk of fire from electrical faults.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 20 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 480 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HE42B020\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eDirect compatibility with Siemens panels and distribution systems, simplifying replacements and upgrades.\u003c\/li\u003e \u003cli\u003eDesigned for reliable protection in 480 V circuits, making it suitable for motor loads, HVAC equipment, and industrial controls.\u003c\/li\u003e \u003cli\u003eClear part identification with a precise specification footprint for maintenance records and service planning.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e motor control circuits in manufacturing facilities powered by 480 V\u003c\/li\u003e \u003cli\u003eProtection for 480 V distribution panels in warehouses or data center support infrastructure\u003c\/li\u003e \u003cli\u003eHVAC and large machinery circuits that operate at high voltage\u003c\/li\u003e \u003cli\u003ePanel upgrades where upgrading to a modern Siemens 2-pole 480 V circuit breaker is advantageous\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eInstallation and practical notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInstall according to local electrical codes and the equipment manufacturer’s guidelines. Ensure the breaker is compatible with your panel’s design and follow proper torque and safety practices during mounting. The 2-pole design ensures simultaneous isolation of both hot lines, which is essential for safely servicing high-voltage equipment.\u003c\/p\u003e \u003cp\u003eFor dependable, precise protection in demanding electrical environments, the Siemens HE42B020 20A 2-Pole 480 V circuit breaker delivers clear performance benefits, straightforward replacement, and compatibility with Siemens-compatible systems.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46423263772834,"sku":"HE42B020","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/siemens-he42b020","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}