{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2345-6KK12","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2345-6KK12","canonicalUrl":"https://aoctrl.com/siemens/5SM2345-6KK12","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2345-6KK12","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM2345-6KK12, 4-pole RCCB, Type A, In: 63 A, 30 mA, Un AC: 400 V, for 5SY, DIN rail mount.","salesMarkdown":"The Siemens 5SM2345-6KK12 is a 4-pole residual current circuit breaker (RCCB) rated 63 A at 400 V AC, 50 Hz, with a 30 mA trip threshold and Type A sensitivity. The 63 A rating at 40 °C (58.6 A) and 45 °C (58.59 A) means this device carries the full load of a three-phase sub-distribution board or a large machine infeed without nuisance tripping from leakage — the 30 mA threshold catches sinusoidal AC and pulsating DC fault currents, covering most modern electronic loads (switched-mode power supplies, VFDs, rectifiers). Type A is the standard choice for circuits with single-phase rectification downstream — think PLC power supplies, lighting ballasts, or small drives. The 124 mm width (3 modular units) and 77 mm depth with 70 mm installation depth mean it occupies three 18 mm slots in a distribution board — check your enclosure fill factor before committing the BOM line. ## Temperature derating — the real-world rating The 63 A nominal rating holds at 40 °C ambient. Above that, the continuous current drops: 58.6 A at 40 °C, 56.7 A at 50 °C, 53.55 A at 60 °C, and 50.4 A at 70 °C.","metaTitle":"Siemens 5SM2345-6KK12 4P RCCB Type A, 63A 30mA","metaDescription":"Siemens 5SM2345-6KK12 4-pole RCCB, Type A, 63A rated current, 30mA trip sensitivity. Active production. DIN rail mount. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"124 mm","title":"5SM2345-6KK12","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","description":"RC-Unit, 4-pole, Type A, In: 63 A, 30 mA, Un AC: 400 V, for 5SY","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"DIN rail (REG)","Mounting Position":"any","Installation Depth":"70 mm","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Operating Frequency":"50 Hz","at AC / rated value":"63 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Residual Current Type":"A","at 40 °C / rated value":"58.6 A","at 45 °C / rated value":"58.59 A","at 50 °C / rated value":"56.7 A","at 55 °C / rated value":"54.81 A","at 60 °C / rated value":"53.55 A","at 65 °C / rated value":"52.29 A","at 70 °C / rated value":"50.4 A","Number Of Modular Width Units":"3","Product Feature / Silicon-Free":"Yes","For Testing Equipment / Minimum":"195 V","Position / Of Power Supply Cord":"bottom","Insulation Voltage / Rated Value":"460 V","Tripping Fault Current / Rated Value":"30 mA","Supply Voltage Frequency / Rated Value":"50 Hz","Surge Current Resistance / Rated Value":"1 kA","Switching Function / Short-Term Delayed":"No","size of installation devices / acc. to DIN 43880":"1","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/91af0fb48a9d9222c30189bf30884455.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1525763&mlfb=5SM2345-6KK12"},"ai":{"faq":[{"question":"What is the 5SM2345-6KK12 used for?","answer":"It is a 4-pole Type A RCCB rated 63 A and 30 mA, used for earth-fault protection in three-phase distribution boards, typically upstream of socket outlets, lighting circuits, or mixed loads with electronic equipment."},{"question":"What are the key ratings of the 5SM2345-6KK12?","answer":"Rated current 63 A at 40 °C, 30 mA trip sensitivity, Type A, 4-pole, 400 V AC, 50 Hz, IP20, DIN rail mount. Derate to 56.7 A at 50 °C ambient."},{"question":"Where can I buy the 5SM2345-6KK12?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2345-6KK12","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/5SM2345-6KK12 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}