{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3646-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3646-6","canonicalUrl":"https://aoctrl.com/siemens/5SM3646-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3646-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series, RCCB, 4-pole, Type A, 63 A, 400 V AC, 10 kA SCCR, instantaneous, DIN rail mount.","salesMarkdown":"## RCCB for 63 A feeder circuits The Siemens 5SM3646-6 is a 4-pole residual current circuit breaker (RCCB) from the SENTRON 5SM3 series, rated 63 A at 400 V AC, 50 Hz, with a 10 kA short-circuit current rating. It detects Type A fault currents — AC sinusoidal and pulsating DC — making it suitable for circuits with single-phase rectifiers or electronic loads. The instantaneous trip design means no intentional time delay, so it clears ground faults as fast as the loop impedance allows. Mounts on DIN rail (REG), 4 width units, and accepts top or bottom feed. Full 63 A rating holds up to 45 °C ambient. Above that, the continuous current derates stepwise: 60.48 A at 50 °C, 57.96 A at 55 °C, 55.44 A at 60 °C, 52.92 A at 65 °C, and 50.4 A at 70 °C. Mounting position is unrestricted, which simplifies panel layout in tight enclosures. ## Physical fit and protection class Finger and back-of-hand touch-safe per the design. Silicon-free construction, which matters for potting or conformal-coating processes. ## Fault current withstand and test circuit Permissible I²t value of 70 000 A²·s and a surge current resistance of 1 kA. The test circuit requires a minimum of 100 V to operate. Functional designation per DIN EN 61346-2 and DIN EN 81346-2 is F.","metaTitle":"Siemens 5SM3646-6 SENTRON RCCB, 63A 4P Type A, 10kA","metaDescription":"Siemens 5SM3646-6 SENTRON RCCB, 63 A, 4-pole, Type A, 10 kA SCCR, 400 V AC. 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":{"Depth":"77 mm","Width":"72 mm","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","at 40 Cel":"63 A","at 45 Cel":"63 A","at 50 Cel":"60.48 A","at 55 Cel":"57.96 A","at 60 Cel":"55.44 A","at 65 Cel":"52.92 A","at 70 Cel":"50.4 A","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","Number of poles":"4","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Operating frequency":"50Hz","Product designation":"RCCB","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Design of the product":"Instantaneous","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":"70 000 A²·s","circuit-breaker / Design":"5SM3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"63 A","Product feature / silicon-free":"Yes","For Testing Equipment / Minimum":"100 V","Position / of power supply cord":"top or bottom","Protection against electrical shock":"Finger and back-of-hand safe","Surge current resistance / rated value":"1 kA","Switching function / short-term delayed":"No","Tripping residual current / rated value":"300 mA","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=264663&mlfb=5SM3646-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3646-6/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SM3646-6?","answer":"We source the 5SM3646-6 to order against an RFQ. Availability and current pricing are confirmed at quote time through our independent distribution channels."},{"question":"What is the closest functional alternative to 5SM3646-6?","answer":"The 5SY4304-7CV is a similar SENTRON RCCB but with different ratings — verify your circuit's current, pole count, and fault type before substituting. The 5SM3646-6 is a 63 A, 4-pole, Type A instantaneous device; the 5SY series may differ in trip characteristic or width units."},{"question":"What are the key specifications of 5SM3646-6?","answer":"63 A rated current, 400 V AC, 4-pole, Type A fault current detection, 10 kA SCCR, instantaneous trip, DIN rail mount, 72 mm wide, 77 mm deep, 90 mm high."},{"question":"Will 5SM3646-6 drop into a panel specified around 5SY4304-7CV?","answer":"Both are DIN-rail mounted RCCBs from the SENTRON family, but verify the width: the 5SM3646-6 occupies 4 width units (72 mm). Check that your panel's busbar arrangement and feeder rating match the 63 A / 4-pole / Type A specification before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3646-6","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/5SM3646-6 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}}