{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3318-0KK","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3318-0KK","canonicalUrl":"https://aoctrl.com/siemens/5SM3318-0KK","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3318-0KK","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3318-0KK RCCB, 2-pole, Type AC, 100 A rated, 30 mA trip, 230 V AC, 10 kA SCCR, DIN rail mount, 2 MW units.","salesMarkdown":"The Siemens SENTRON 5SM3318-0KK is a 2-pole residual current operated circuit breaker (RCCB), Type AC, rated 100 A with a 30 mA trip threshold on 230 V AC at 50 Hz. Installation depth is 70 mm — measure your enclosure's clear space behind the rail before committing. Supply can land top or bottom, which helps when reworking an existing board without flipping the busbar. IP20 with conductors connected and distribution board installed — that's protected-finger touch only. ## Breaking capacity and standard compliance Rated short-circuit current (SCCR) is 10 kA per IEC 61008-1; the EN 60898 rating is 1 kA. Overvoltage category III confirms it's rated for fixed-installation mains (distribution level, not sub-circuits). ## Ambient limits and thermal derating The 45 °C ceiling is the running limit — above that you'd need to derate the 100 A continuous rating, though the datasheet doesn't publish a curve. If your panel internal temperature regularly hits 40 °C+ (sunlit enclosure, high-density gear), factor in headroom.","metaTitle":"Siemens SENTRON 5SM3318-0KK RCCB, 100 A, 30 mA, 2-pole, Type","metaDescription":"Siemens SENTRON 5SM3318-0KK RCCB, 100 A rated, 30 mA trip, 2-pole Type AC, 10 kA SCCR, DIN rail mount. Active production, 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":{"Maximum":"45 °C","Minimum":"-5 °C","Number Of Poles":"2","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":"100 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"AC","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"2","Product Feature / Silicon-Free":"Yes","Position / Of Power Supply Cord":"top or bottom","according to EN 60898 / rated value":"1 kA","Tripping Fault Current / Rated Value":"30 mA","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","Value Range / Of The Supply Voltage Frequency":"50 Hz","Supply Voltage / For Testing Equipment / Minimum":"100 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f4f08a341d7c15f05e0913c8a81781ea.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=73388&mlfb=5SM3318-0KK","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3318-0KK/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SM3318-0KK?","answer":"Submit an RFQ through this listing. The part is sourced to order against a confirmed quote; availability and price are confirmed at quote time."},{"question":"Will 5SM3318-0KK drop into a panel specified around 5SL6550-7BB without rewiring?","answer":"Both are 2-pole, 2 MW units on DIN rail, so the physical footprint is the same. But the 5SL6550-7BB is a miniature circuit breaker (MCB), not an RCCB — it provides overcurrent and short-circuit protection only. The 5SM3318-0KK provides residual-current protection (30 mA) but no overcurrent protection. They are not drop-in substitutes; the panel's protection scheme determines which one fits."},{"question":"What compliance documentation does this brand provide for 5SM3318-0KK?","answer":"As a SENTRON device, it carries IEC 61008-1 and EN 60898 compliance. The evidence does not list specific RoHS, REACH, or UL documentation, but Siemens standard practice is to provide these declarations on request through the RFQ process."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3318-0KK","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/5SM3318-0KK 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}}