{"product_id":"siemens-heg3b125-circuit-breaker","title":"Siemens | HEG3B125 | Circuit Breaker | 125A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens HEG3B125 circuit breaker is a purpose-built protection device for 3‑phase electrical systems, engineered to guard circuits up to 125 amperes at voltages as high as 600V. Ideal for maintenance, retrofit, and replacement projects, this 3‑pole unit delivers reliable overcurrent protection with a proven Siemens build quality that technicians trust in demanding environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 125 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3‑Pole (three‑pole)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HEG3B125\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication fit:\u003c\/strong\u003e Compatible with panels designed to accept this Siemens model for maintenance, retrofit, and replacement projects\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eDesigned for compatibility and easy substitution\u003c\/h3\u003e\n\u003cp\u003eWhen you need a like‑for‑like replacement, the HEG3B125 is designed to slot into compatible Siemens panels and other assemblies that specify this exact model. The part number is the most reliable reference for compatibility, so confirm the fit and ratings before ordering to minimize downtime and ensure continued protection of your 3‑phase system.\u003c\/p\u003e \u003ch3\u003eWhy choose this Siemens 125A, 3‑pole breaker\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eTrustworthy protection for 3‑phase systems:\u003c\/strong\u003e A dedicated 3‑pole design protects all three legs in a three‑phase circuit up to 125A, helping prevent equipment damage and electrical hazards.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear compatibility signal:\u003c\/strong\u003e The HEG3B125 is the explicit part reference to match with compatible panels, reducing guesswork during replacement or retrofit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable, long‑cycle maintenance option:\u003c\/strong\u003e As a Siemens part, it aligns with existing protection schemes and panel architectures, promoting consistent performance over time.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance or service outages on three‑phase, 600V environments where 125A protection is required\u003c\/li\u003e \u003cli\u003eRetrofit projects updating older gear to a Siemens‑standard protection device\u003c\/li\u003e \u003cli\u003eReplacement for failed breakers in compatible Siemens or Siemens‑style panels\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and ordering tips\u003c\/h3\u003e\n\u003cp\u003eTo ensure a trouble‑free substitution, use the exact part number HEG3B125 as the primary reference. Always verify fit and ratings against the target panel’s specification before purchase. If you’re uncertain, consult your panel documentation or a qualified electrician to confirm that the circuit breaker matches the panel’s intended protection and connector configurations.\u003c\/p\u003e \u003ch3\u003eSafety and installation notes\u003c\/h3\u003e\n\u003cp\u003eWork with the main power secured and follow applicable electrical codes and manufacturer guidelines. Use appropriate PPE and ensure the replacement procedure is performed by trained personnel familiar with three‑phase protection devices and Siemens hardware.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427270512802,"sku":"HEG3B125","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/siemens-heg3b125-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}