{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3626-4KK14","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3626-4KK14","canonicalUrl":"https://aoctrl.com/siemens/5SM3626-4KK14","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3626-4KK14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 2-pole, 63 A at 40 °C, 230 V AC, B+ fault current type, short-time delayed, 10 kA short-circuit current rating, DIN rail mounting, IP20.","salesMarkdown":"The Siemens SENTRON 5SM3626-4KK14 is a 2-pole residual current circuit breaker (RCCB) rated 63 A at 40 °C and 230 V AC, with a B+ fault current type and short-time delayed switching function. The 63 A rating at 40 °C is the continuous current it carries in a panel at that ambient — at 70 °C it still holds 50.4 A, so the thermal derating curve is real and worth checking if your enclosure runs hot near the kiln or furnace line. The B+ type detects AC, pulsating DC, smooth DC, and high-frequency fault currents up to 1 kHz, which covers variable-speed drive leakage and modern power supply earth faults that a standard AC type would miss. The short-time delayed design (S-type) means it withstands transient leakage pulses up to 3 kA surge current without tripping, giving selectivity with downstream instantaneous RCCBs — essential for a distribution board feeding multiple sub-circuits. IP20 with conductors connected, finger and back-of-hand safe per the protection class. ## Integration and mounting notes Mounting position is any orientation. The supply cord can enter from the top or bottom — bottom entry also powers the SIGRES function in the switched-off state. Installation depth is 70 mm, matching the device depth. The 4 width units (72 mm) occupy four 18 mm module spaces in a distribution board. Silicon-free construction, suitable for environments where silicone outgassing could contaminate contacts or optics. ## Thermal derating across ambient temperature Rated current is 63 A at both 40 °C and 45 °C ambient. At 50 °C it derates to 60.5 A, at 55 °C to 58 A, at 60 °C to 55.4 A, at 65 °C to 52.9 A, and at 70 °C to 50.4 A.","metaTitle":"Siemens SENTRON 5SM3626-4KK14 RCCB, 63 A, 230 V, B+ Type","metaDescription":"Siemens SENTRON 5SM3626-4KK14 RCCB, 63 A at 40 °C, 230 V AC, B+ fault current type, 10 kA SCCR, short-time delayed, DIN rail mount. 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":"70 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":"60.5 A","at 55 Cel":"58 A","at 60 Cel":"55.4 A","at 65 Cel":"52.9 A","at 70 Cel":"50.4 A","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","Number of poles":"2","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Product designation":"RCCB","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","at AC / rated value":"230 V","Overvoltage category":"III","Design of the product":"Short-time delayed","Number of width units":"4","Type of fault current":"B+","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":"195 V","Position / of power supply cord":"Top or bottom (bottom for SIGRES function also in switched-off state)","Protection against electrical shock":"Finger and back-of-hand safe","Surge current resistance / rated value":"3 kA","Switching function / short-term delayed":"Yes","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=200443&mlfb=5SM3626-4KK14","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3626-4KK14/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 5SM3626-4KK14 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Submit an RFQ for current pricing and availability."},{"question":"What are the key ratings of 5SM3626-4KK14?","answer":"63 A at 40 °C, 230 V AC, B+ fault current type, short-time delayed, 10 kA SCCR, 3 kA surge current resistance, 2-pole, DIN rail mount, IP20."},{"question":"What is the difference between this B+ type RCCB and a standard AC type?","answer":"The B+ type detects AC, pulsating DC, smooth DC, and high-frequency fault currents up to 1 kHz, covering VFD leakage and modern power supply earth faults that a standard AC-only RCCB would miss."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3626-4KK14","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/5SM3626-4KK14 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}}