{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SV3644-8LA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SV3644-8LA","canonicalUrl":"https://aoctrl.com/siemens/5SV3644-8LA","factsUrl":"https://aoctrl.com/api/mcp/products/5SV3644-8LA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SV3 series, 5SV3644-8LA, 4-pole RCCB, 40 A, Type A, selective, 10 kA, 230/400 V AC, DIN rail.","salesMarkdown":"It is a selective (S-type) device, meaning it incorporates a short time delay to achieve coordination with downstream RCCBs — only the faulted branch trips, keeping healthy circuits live. That is unusual for a thermal-magnetic device; here it is a pure residual-current trip, so the 40 A is the maximum continuous load current the main contacts can carry, not a thermal trip threshold. ## Selective (S-type) design — coordination logic The S-type designation means this RCCB is deliberately delayed (typically 40–150 ms) so that a downstream standard RCCB clears a ground fault first. In a distribution board feeding multiple sub-panels or machine circuits, the selective RCCB at the incomer prevents a single branch fault from blacking out the entire board. The surge current withstand is 5 kA, and the I²t rating is 58 000 A²s — both figures that matter when sizing upstream protection. ## Deployment context","metaTitle":"Siemens SENTRON 5SV3644-8LA RCCB, 4P, 40 A, Type A, 10 kA","metaDescription":"Siemens SENTRON 5SV3644-8LA 4-pole RCCB, 40 A rated, Type A, selective (S), 10 kA SCCR, 230/400 V AC. DIN rail mount. Current production. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Solid":"0.75 ... 35 mm²","Width":"72 mm","title":"5SV3644-8LA","Height":"90 mm","Stranded":"0.75 ... 35 mm²","at 40 Cel":"40 A","at 45 Cel":"40 A","at 50 Cel":"40 A","at 55 Cel":"40 A","at 60 Cel":"40 A","at 65 Cel":"40 A","at 70 Cel":"40 A","Rated Value":"50 Hz","description":"Residual current operated circuit breaker, 4-pole, Type A, selective, In: 40 A, 300 mA, Un AC: 400 V, with thermal overload protection","Wertebereich":"-25 ... +45 °C","Mounting type":"DIN rail (REG)","Number of poles":"4","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product variations":"With thermal overload protection","Ambient temperature":"-40 ... +75 °C","Operating frequency":"50/60Hz","Product designation":"RCCB","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Selective","Number of width units":"4","Type of fault current":"A","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","I2t-value / permissible":"58 000 A²·s","circuit-breaker / Design":"5SV3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"40 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"top or bottom","Protection against electrical shock":"Finger and back-of-hand safe","Supply voltage / at AC / rated value":"230/400 V","Surge current resistance / rated value":"5 kA","Switching function / short-term delayed":"No","Tripping residual current / rated value":"300 mA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Size of installation devices / acc. to DIN 43880":"1","Supply voltage / for testing equipment / minimum":"100 V","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=683217&mlfb=5SV3644-8LA"},"ai":{"faq":[{"question":"What is the depth of 5SV3644-8LA?","answer":"The installation depth is 70 mm behind the panel surface."},{"question":"What conductor sizes does 5SV3644-8LA accept?","answer":"It accepts solid or stranded conductors from 0.75 mm² up to 35 mm²."},{"question":"Where can I buy 5SV3644-8LA?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation is available for 5SV3644-8LA?","answer":"The product carries Siemens SENTRON brand documentation; the design complies with applicable IEC/EN standards for RCCBs (the selective S-type per EN 61008). RoHS, REACH, and other EU directives are typically covered by Siemens standard declarations — confirm specific documentation needs at RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SV3644-8LA","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/5SV3644-8LA when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}