{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3646-4KK14","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3646-4KK14","canonicalUrl":"https://aoctrl.com/siemens/5SM3646-4KK14","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3646-4KK14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCCB, 5SM3646-4KK14, 4-pole, 63 A, 300 mA Type B+, short-time delayed, 10 kA SCCR, DIN rail mount.","salesMarkdown":"The Siemens 5SM3646-4KK14 is a SENTRON-series residual current circuit breaker (RCCB) designed for 4-pole, 63 A circuits with a 300 mA Type B+ residual-current trip. The Type B+ classification means it detects smooth DC residual currents and high-frequency AC components — not just standard AC and pulsating DC — making it suitable for circuits with variable-speed drives, UPS systems, or EV charging equipment where non-sinusoidal fault currents are common. The IP20 rating applies when the distribution board is installed with conductors connected — standard for enclosed panelboards, not for open wet-area mounting. ## Thermal derating and ambient limits Rated 63 A continuously at 40 °C and 45 °C ambient. Above that, the device derates linearly: 60.5 A at 50 °C, 58 A at 55 °C, 55.4 A at 60 °C, 52.9 A at 65 °C, and 50.4 A at 70 °C.","metaTitle":"Siemens 5SM3646-4KK14 SENTRON RCCB, 4P, 63A, 300mA Type B+,","metaDescription":"Siemens SENTRON 5SM3646-4KK14 RCCB, 4-pole, 63 A rated, 300 mA Type B+ residual current, 10 kA SCCR. Active production. Quoted to order.","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","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","Product Designation":"RCCB","at AC / rated value":"63 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Short-time delayed","Residual Current Type":"B+","I2t value / permissible":"70 000 A²·s","at 40 °C / rated value":"63 A","at 45 °C / rated value":"63 A","at 50 °C / rated value":"60.5 A","at 55 °C / rated value":"58 A","at 60 °C / rated value":"55.4 A","at 65 °C / rated value":"52.9 A","at 70 °C / rated value":"50.4 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","For Testing Equipment / Minimum":"195 V","Position / Of Power Supply Cord":"Top or bottom (bottom for SIGRES function also in switched-off state)","Let-Through Current / Permissible":"7 500 kA","Tripping Fault Current / Rated Value":"300 mA","Supply Voltage Frequency / Rated Value":"50 Hz","Surge Current Resistance / Rated Value":"3 kA","according to IEC 61008-1 / rated value":"0.8 kA","Switching Function / Short-Term Delayed":"Yes","size of installation devices / acc. to DIN 43880":"1","Mechanical Service Life (Operating 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=147678&mlfb=5SM3646-4KK14","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3646-4KK14/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3646-4KK14 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability."},{"question":"What are the key dimensions of 5SM3646-4KK14?","answer":"Width 72 mm (4 modular units), depth 77 mm, height 90 mm, installation depth 70 mm."},{"question":"What compliance documentation does Siemens provide for 5SM3646-4KK14?","answer":"The part carries IEC 61008-1 compliance and is rated for 50 Hz supply. It is silicon-free. Specific RoHS/REACH/UL documentation should be requested at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3646-4KK14","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/5SM3646-4KK14 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}}