{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3646-6BA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3646-6BA","canonicalUrl":"https://aoctrl.com/siemens/5SM3646-6BA","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3646-6BA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3646-6BA, 4-pole RCCB, Type A, 63 A, 300 mA, 400 V AC, instantaneous, 10 kA SCCR.","salesMarkdown":"## RCCB for 4-wire systems, Type A sensitivity The Siemens 5SM3646-6BA is a 4-pole residual current circuit breaker (RCCB) from the SENTRON family, rated 63 A at 400 V AC with a 300 mA trip threshold and Type A residual current sensitivity. Type A detection covers sinusoidal AC fault currents plus pulsating DC fault currents — the standard for circuits with single-phase rectifiers, switching power supplies, or variable-speed drives downstream. Snaps onto DIN rail (REG) per, occupying 4 modular width units (4 MW) at a 70 mm installation depth. IP20 with conductors connected, so it lives inside a closed panel or distribution box, not exposed to washdown. ## Ambient limits and storage range Operating ambient spans -25 °C to 45 °C; storage extremes are -40 °C to 75 °C.","metaTitle":"Siemens 5SM3646-6BA SENTRON RCCB, 4P, 63 A, 300 mA, Type A","metaDescription":"Siemens 5SM3646-6BA SENTRON RCCB, 4-pole, 63 A rated current, 300 mA trip, Type A, 400 V AC, 10 kA SCCR. 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":{"Maximum":"45 °C","Minimum":"-25 °C","Rated Value":"50 Hz","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"DIN rail (REG)","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Operating Frequency":"50 Hz","Product Designation":"RCCB","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"A","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"4","Product Feature / Silicon-Free":"Yes","acc. to EN 60898 / rated value":"0.8 kA","Position / Of Power Supply Cord":"top or bottom","Tripping Fault Current / Rated Value":"300 mA","supply voltage / at AC / rated value":"400 V","Surge Current Resistance / Rated Value":"1 kA","according to IEC 61008-1 / rated value":"0.8 kA","Switching Function / Short-Term Delayed":"No","operational current / at AC / rated value":"63 A","Supply Voltage / For Testing Equipment / Minimum":"100 V","size of installation devices / acc. to DIN 43880":"1","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"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=615905&mlfb=5SM3646-6BA","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3646-6BA/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 5SM3646-6BA?","answer":"The 5SU9354-7KK16 is a 2-pole RCBO (RCD + MCB combined) with Type A sensitivity and a 10 kA SCCR, but it is a 1P+N device rated 230/240 V, not a 4-pole RCCB at 400 V. It does not drop in as a form-fit replacement — the pole count, voltage rating, and physical width (2 MW vs 4 MW) differ. For a 4-pole RCCB application, the 5SM3646-6BA is the correct SENTRON part."},{"question":"What are the key ratings for 5SM3646-6BA?","answer":"Rated operational current 63 A at 400 V AC, 4-pole, Type A residual current, 300 mA trip threshold, instantaneous (no short-time delay), 10 kA SCCR per IEC 61008-1 and 0.8 kA per EN 60898."},{"question":"Where can I buy 5SM3646-6BA and how is it quoted?","answer":"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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3646-6BA","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/5SM3646-6BA 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}}