{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SV3646-8MJ","brand":"Siemens","brandSlug":"siemens","productSlug":"5SV3646-8MJ","canonicalUrl":"https://aoctrl.com/siemens/5SV3646-8MJ","factsUrl":"https://aoctrl.com/api/mcp/products/5SV3646-8MJ","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SV3646-8MJ, residual current operated circuit breaker Type A, 63 A, 300 mA, 10 kA, 3+N-pole, 400 V, selective (S-type).","salesMarkdown":"The Siemens 5SV3646-8MJ is a residual current operated circuit breaker (RCCB) Type A, rated 63 A with a 300 mA trip sensitivity, 10 kA breaking capacity, 3+N-pole configuration, and 400 V operating voltage. It is a selective (S-type) device, meaning it has a deliberate time delay to coordinate with downstream RCCBs — the upstream unit holds during a fault on a branch, so only the closest breaker trips, keeping the rest of the distribution live. ## Deployment context This is a DIN-rail mounted RCCB for distribution boards in commercial and industrial installations. The 300 mA sensitivity and Type A waveform detection (sinusoidal AC plus pulsating DC fault currents) suit it for circuits with electronic loads — VFDs, switched-mode power supplies, UPS systems — where pure AC detection would miss half-wave fault currents.","metaTitle":"Siemens 5SV3646-8MJ RCCB Type A, 63A 300mA 10kA Selective","metaDescription":"Siemens 5SV3646-8MJ residual current circuit breaker, Type A, 63 A, 300 mA, 10 kA, 3+N-pole, 400 V, selective. 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":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ed280646498d532ac59ddeccc41d4200.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=685522&mlfb=5SV3646-8MJ","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SV3646-8MJ/alternatives.json"},"ai":{"faq":[{"question":"What is 5SV3646-8MJ used for?","answer":"The 5SV3646-8MJ is a selective Type A residual current circuit breaker (RCCB) rated 63 A, 300 mA, 10 kA, 3+N-pole at 400 V. It provides earth-fault protection in distribution boards, with a deliberate time delay to coordinate with downstream RCCBs."},{"question":"Where can I buy 5SV3646-8MJ?","answer":"The 5SV3646-8MJ is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing."},{"question":"What does Type A and selective (S-type) mean on this RCCB?","answer":"Type A detection covers sinusoidal AC and pulsating DC fault currents — typical for circuits with rectifiers, VFDs, or switched-mode supplies. The selective (S-type) characteristic introduces a time delay so the device coordinates with downstream RCCBs, tripping only on sustained faults to maintain supply continuity on healthy branches."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SV3646-8MJ","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/5SV3646-8MJ 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}}