{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3318-6KK","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3318-6KK","canonicalUrl":"https://aoctrl.com/siemens/5SM3318-6KK","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3318-6KK","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3318-6KK, RCCB, 2-pole, Type A, rated current 100 A, rated residual current 30 mA, Un AC 230 V, 50 Hz, 10 kA SCCR, DIN rail mount, IP20.","salesMarkdown":"The Siemens SENTRON 5SM3318-6KK is a 2-pole residual current operated circuit breaker (RCCB), Type A, rated for 100 A continuous load and 30 mA residual current sensitivity on a 230 V AC, 50 Hz supply. The 100 A rating sizes it for a main incoming supply or a high-load submain, not a branch circuit. The conditional breaking capacity per EN 60898 is listed at 1 kA when backed by an overcurrent protective device, which is the coordination value for standard domestic back-up fuses or MCBs. The 2-pole design switches both line and neutral. Mounting is on DIN rail (REG), width 2 modular units (36 mm). Depth is 70 mm, height 90 mm. The enclosure rating is IP20 only when installed in a distribution board with all conductors connected — the terminals are not touch-safe exposed. Silicon-free construction is a bonus for applications where silicone outgassing can contaminate contacts or optical surfaces, such as paint shops or clean-room adjacent panels. The 70 mm installation depth matches the standard SENTRON distribution board depth — no need for a deeper enclosure. The instantaneous design trips on the first half-cycle of a residual fault.","metaTitle":"Siemens 5SM3318-6KK SENTRON RCCB, 2-pole, 100 A, 30 mA, Type","metaDescription":"Siemens 5SM3318-6KK SENTRON RCCB, 2-pole, 100 A rated, 30 mA sensitivity, Type A, 10 kA SCCR, 230 V AC, 50 Hz, DIN rail mount, IP20, active production, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Width":"36 mm","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"DIN rail (REG)","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Designation":"RCCB","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Product Feature Silicon-Free":"Yes","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"top or bottom","according to EN 60898 rated value":"1 kA","according to IEC 61008-1 rated value":"1 kA","Switching Function Short-Term Delayed":"No","Value Range Of The Operating Frequency":"50 Hz","value range of the supply voltage at AC":"230 V","Ambient Temperature During Storage Minimum":"-40 °C","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"100 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/50448f85bd2e515fb279cfd4fa30906d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=481468&mlfb=5SM3318-6KK","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3318-6KK/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 5SM3318-6KK?","answer":"The 5SL6550-7BB is a SENTRON miniature circuit breaker with the same 2-pole, 2-MW DIN rail footprint and 70 mm installation depth, but it is an MCB (50 A, C-curve) with a 6 kA breaking capacity, not an RCCB. It does not provide residual current protection. For a direct RCCB replacement, the 5SM3 series is the correct family; no second-source with identical ratings is listed in this evidence."},{"question":"Will 5SM3318-6KK drop into a panel specified for 5SL6550-7BB without rewiring?","answer":"The 5SM3318-6KK shares the same 36 mm width, 90 mm height, and 70 mm installation depth as the 5SL6550-7BB, so it fits the same DIN rail slot and enclosure depth. However, the 5SL6550-7BB is a 50 A MCB, while the 5SM3318-6KK is a 100 A RCCB — the circuit must be rated for 100 A and include a neutral conductor for the RCCB to function. Rewiring is required if the existing circuit is only 50 A or lacks a switched neutral."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3318-6KK","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/5SM3318-6KK 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}}