{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SV3644-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SV3644-8","canonicalUrl":"https://aoctrl.com/siemens/5SV3644-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SV3644-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCCB, 4-pole, type A, selective, In: 40 A, 300 mA, Un AC: 400 V, 10 kA SCCR, DIN rail mount, IP20.","salesMarkdown":"## What this RCCB does on the line The Siemens SENTRON 5SV3644-8 is a 4-pole residual current circuit breaker (RCCB), type A, selective, rated 40 A with a 300 mA trip threshold at 230/400 V AC. The type A characteristic means it detects pulsating DC fault currents on top of sinusoidal AC — common in drives, rectifiers, and switching power supplies found on modern lines. The selective (S) design introduces a deliberate time delay so that downstream RCCBs trip first, keeping this unit as the backup ground-fault protection for the whole subdistribution. ## Ratings that govern fit The 300 mA residual sensitivity is a deliberate choice: it is above the 30 mA required for personnel protection, so this unit is used for fire protection or equipment protection where nuisance tripping from leakage in long cable runs or filters must be avoided. The 40 A continuous rating matches a 40 A busbar tap or feeder breaker feeding a subpanel. The 72 mm width (4 modular units at 18 mm each) and 70 mm depth fit standard SENTRON distribution boards and enclosures. Silicon-free construction suits environments where silicone outgassing can foul contacts or optics.","metaTitle":"Siemens SENTRON 5SV3644-8 RCCB, 4-pole, Type A, Selective, 4","metaDescription":"Siemens SENTRON 5SV3644-8 RCCB, 4-pole, type A, selective, 40 A, 300 mA, 400 V AC, 10 kA SCCR, active production. Quoted 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","Width":"72 mm","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","Grid Spacing":"60 mm","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"DIN rail (REG)","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Designation":"RCCB","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Selective","Product Feature Silicon-Free":"Yes","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"top or bottom","according to IEC 61008-1 rated value":"0.8 kA","Switching Function Short-Term Delayed":"No","Value Range Of The Operating Frequency":"50/60 Hz","value range of the supply voltage at AC":"230/400 V","Ambient Temperature During Storage Minimum":"-40 °C","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"100 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","Short-Circuit Current Of Series Fuse Maximum Permissible":"100 A","for rated value of the current at AC in hot operating state per pole":"1.8 W"}},"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=604203&mlfb=5SV3644-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SV3644-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SV3644-8 and how do I get a price?","answer":"The 5SV3644-8 is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is 5SV3644-8's depth and width?","answer":"The 5SV3644-8 is 70 mm deep and 72 mm wide (4 modular units at 18 mm each)."},{"question":"Will 5SV3644-8 drop into a panel built for 5SL4363-7?","answer":"No — the 5SL4363-7 is a 3-pole miniature circuit breaker (54 mm wide), not a 4-pole RCCB (72 mm wide). The 5SV3644-8 needs a wider DIN-rail slot and serves a different protection function (ground-fault vs overcurrent). Rewiring is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SV3644-8","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/5SV3644-8 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}}