{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3646-6MJ","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3646-6MJ","canonicalUrl":"https://aoctrl.com/siemens/5SM3646-6MJ","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3646-6MJ","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 63 A, 300 mA sensitivity, 10 kA breaking capacity, 4-pole (3+N), 400 V AC, 50 Hz.","salesMarkdown":"The Siemens 5SM3646-6MJ is a SENTRON residual current circuit breaker (RCCB) — Type A, 4-pole (3+N), rated 63 A with 300 mA earth leakage sensitivity and a 10 kA breaking capacity at 400 V AC, 50 Hz. This is the part that sits downstream of the main breaker, protecting a three-phase plus neutral circuit against ground faults. The 300 mA threshold means it is sized for equipment protection rather than personnel shock protection (30 mA is the typical human-safety threshold); you spec this one where the leakage budget from drives, heaters, or long cable runs would nuisance-trip a finer device. ## Panel integration The 3+N pole arrangement means the neutral is switched and monitored internally; no separate neutral bar needed downstream of this device. Rated for 50 Hz only — not a 50/60 Hz universal part, so confirm your line frequency before committing. The 400 V AC rated voltage covers 230/400 V three-phase networks common in European and APAC distribution.","metaTitle":"Siemens 5SM3646-6MJ SENTRON RCCB, 63A 300mA 10kA 4P 400V AC","metaDescription":"Siemens SENTRON 5SM3646-6MJ RCCB, 63A rated, 300mA sensitivity, 10kA breaking capacity, 4-pole, 400V AC, 50 Hz. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Rated Value":"50 Hz","lifecycle_stage":"current","Product brand name":"SENTRON","Operating frequency":"50 Hz","Product designation":"RCCB","circuit-breaker / Design":"5SM3"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=165982&mlfb=5SM3646-6MJ","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3646-6MJ/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3646-6MJ and how is it quoted?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers are published here."},{"question":"What is the rated frequency of 5SM3646-6MJ?","answer":"Rated for 50 Hz only. Not a 50/60 Hz universal part."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3646-6MJ","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/5SM3646-6MJ 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}}