{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM9343-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM9343-0","canonicalUrl":"https://aoctrl.com/siemens/5SM9343-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM9343-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON residual current unit, 4-pole, type AC, 40 A, 30 mA, 400 V AC, 50 Hz, for 5SL4 miniature circuit breakers.","salesMarkdown":"The Siemens 5SM9343-0 is a SENTRON residual current (RC) unit designed as an electronic add-on for the 5SL4 miniature circuit breaker series. It is a 4-pole, type AC (sinusoidal AC residual currents only) device rated at 40 A and 400 V AC, 50 Hz, with a 30 mA trip threshold. This is the module that snaps onto the bottom of the 5SL4 MCB to create a combined RCBO function — the breaker handles overcurrent and short-circuit, the 5SM9343-0 handles earth leakage. The 40 A rating matches the thermal capacity of the RC unit's own current path; the upstream MCB must be selected at or below this value to avoid nuisance tripping or damage. Mounts via standard rail (DIN) snap-on, any position allowed. The supply connection feeds from the top, above the miniature circuit breaker. Occupies 3 modular width units (18 mm each = 54 mm total width). Depth is 70 mm, matching the standard 5SL4 footprint.","metaTitle":"Siemens 5SM9343-0 SENTRON RC Unit, 40 A, 30 mA, 4P","metaDescription":"Siemens 5SM9343-0 SENTRON residual current unit for 5SL4 MCB, 4-pole, type AC, 40 A rated, 30 mA trip, 400 V, 50 Hz. Active production, sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Width":"54 mm","title":"5SM9343-0","Height":"100 mm","Maximum":"55 °C","Minimum":"-25 °C","description":"RC unit for 5SL4, 4-pole, type AC, In: 40 A, 30 mA, Un AC: 400 V","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Standard rail mounting","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Variations":"DI unit, type AC, 0.3...40 A, 4P, 30 mA","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Product Designation":"RC unit electronic for 5SL4","at AC / rated value":"40 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","Number Of Modular Width Units":"3","Product Feature / Silicon-Free":"Yes","Position / Of Power Supply Cord":"Top, above miniature circuit breaker","according to EN 60898 / rated value":"6 kA","Tripping Fault Current / Rated Value":"30 mA","Surge Current Resistance / Rated Value":"3 kA","according to IEC 61008-1 / rated value":"6 kA","Switching Function / Short-Term Delayed":"No","value range / of the supply voltage / at AC":"400 V","Value Range / Of The Supply Voltage Frequency":"50 Hz","Supply Voltage / For Testing Equipment / Minimum":"125 V","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/4f2d7704c623d89bd107e73c65f4b191.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629192&mlfb=5SM9343-0"},"ai":{"faq":[{"question":"What is the 5SM9343-0 used for?","answer":"It is a residual current (RC) unit that snaps onto a Siemens 5SL4 miniature circuit breaker to add earth leakage protection, forming a combined RCBO. It protects against sinusoidal AC residual currents at a 30 mA threshold."},{"question":"What are the key ratings of the 5SM9343-0?","answer":"4-pole, type AC, rated current 40 A, rated voltage 400 V AC at 50 Hz, rated residual current 30 mA, rated short-circuit capacity 6 kA per EN 60898 and IEC 61008-1."},{"question":"Where can I buy the 5SM9343-0?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM9343-0","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/5SM9343-0 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}}