{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ6120-7FC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ6120-7FC","canonicalUrl":"https://aoctrl.com/siemens/5SJ6120-7FC","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ6120-7FC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SJ6120-7FC, miniature circuit breaker, 1-pole, C-curve, 20 A rated current, 6 kA interrupting capacity.","salesMarkdown":"The 1-pole width (1 module = 18 mm) fits tight panel layouts. Terminal design accepts up to 25 mm² conductor — common for the 20 A feed-through in a sub-distribution board. No external arc-quench clearance needed beyond the standard DIN-rail spacing. The C-curve characteristic means the magnetic trip activates between 5 and 10 times the rated current (100–200 A for this 20 A unit). That suits it for general-purpose resistive and moderate inductive loads where the inrush peak stays under that band. For highly capacitive loads or long cable runs, verify the peak inrush against the C-curve threshold to avoid coordination issues downstream.","metaTitle":"Siemens 5SJ6120-7FC Miniature Circuit Breaker, 1-pole C 20A,","metaDescription":"Siemens 5SJ6120-7FC miniature circuit breaker, 1-pole, C-curve, 20A, 6kA interrupting capacity. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b6c490eb2cf493beb1363ca4eb790a1f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1502687&mlfb=5SJ6120-7FC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ6120-7FC/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SJ6120-7FC and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time estimate."},{"question":"What does the description 5SJ6120-7FC mean?","answer":"It is a Miniature Circuit Breaker, 6 kA interrupting capacity, 1-pole, C-curve, 20 A rated current. The 5SJ6 series is Siemens' standard MCB line for IEC-based distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ6120-7FC","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SJ6120-7FC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}