{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3624-4KK14","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3624-4KK14","canonicalUrl":"https://aoctrl.com/siemens/5SM3624-4KK14","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3624-4KK14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 2-pole, 40 A rated at AC, Type B+ fault current, 10 kA short-circuit rating, short-time delayed, DIN rail mount.","salesMarkdown":"The Siemens 5SM3624-4KK14 is a 2-pole residual current circuit breaker (RCCB) from the SENTRON 5SM3 series, rated 40 A at 230 V AC with a Type B+ fault current characteristic and a 10 kA short-circuit current rating. It is short-time delayed (S-type selectivity), meaning it coordinates with downstream devices to avoid nuisance tripping on transient surges — the 3 kA surge current resistance backs that up. ## Thermal derating and conductor sizing The solid and stranded conductor cross-sections both accept 1.5 to 25 mm² — enough for the full rated current without over-sizing the terminal. The 5SM3624-4KK14 is listed as current production (active lifecycle stage). No official successor has been published; the part is still the active catalog number for this rating and type. Snap-on DIN rail (REG) mounting, any position accepted. Installation depth matches the 70 mm body depth — no extra clearance needed behind the rail. Finger and back-of-hand safe protection against electrical shock is built in, per the design.","metaTitle":"Siemens 5SM3624-4KK14 SENTRON RCCB, 2-pole, 40 A, Type B+, 1","metaDescription":"Siemens 5SM3624-4KK14 SENTRON RCCB, 2-pole, 40 A rated, Type B+ fault current, 10 kA SCCR, short-time delayed, DIN rail mount. 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":"70 mm","Solid":"1.5 ... 25 mm²","Width":"72 mm","Height":"90 mm","Stranded":"1.5 ... 25 mm²","at 40 Cel":"40 A","at 45 Cel":"40 A","at 50 Cel":"38.4 A","at 55 Cel":"36.8 A","at 60 Cel":"35.2 A","at 65 Cel":"33.6 A","at 70 Cel":"32 A","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","During Storage":"-40 ... +75 °C","Number of poles":"2","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °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":"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":"40 A","Product feature / silicon-free":"Yes","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","Supply voltage / at AC / rated value":"230 V","Surge current resistance / rated value":"3 kA","Switching function / short-term delayed":"Yes","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":"195 V","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=215795&mlfb=5SM3624-4KK14","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3624-4KK14/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3624-4KK14 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is the difference between 5SM3624-4KK14 and 5SY4304-7CV?","answer":"The 5SY4304-7CV is a miniature circuit breaker (MCB), not an RCCB — it provides overcurrent and short-circuit protection only, without residual current detection. The 5SM3624-4KK14 is a residual current device (Type B+) that detects AC, pulsating DC, and smooth DC fault currents. They serve different protection roles and are not drop-in interchangeable; a panel specified around the 5SY4304-7CV would need rewiring to add an RCCB."},{"question":"What compliance documentation does Siemens provide for 5SM3624-4KK14?","answer":"The part carries approvals per DIN EN 61346-2 and DIN EN 81346-2 (functional designation F). It is silicon-free. Standard documentation includes the manufacturer's declaration of conformity and CE marking; specific RoHS/REACH/UL documentation should be requested at quote time as it is not pre-loaded in this listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3624-4KK14","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/5SM3624-4KK14 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}}