{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM9343-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM9343-6","canonicalUrl":"https://aoctrl.com/siemens/5SM9343-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SM9343-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM9343-6 residual current unit, electronic, for 5SL4 miniature circuit breaker, 4-pole, type A, In 40 A, 30 mA, Un AC 400 V, 6 kA.","salesMarkdown":"The Siemens 5SM9343-6 is a SENTRON residual current (RC) unit designed to pair with a 5SL4 miniature circuit breaker, forming a combined RCD/MCB assembly for 4-pole (3P+N) circuits. It is rated for 40 A continuous current and a 30 mA trip threshold, type A (pulsating DC and sinusoidal AC sensitive), at 400 V AC supply voltage. Type A detection means it catches both sinusoidal AC faults and pulsating DC faults up to 6 mA smooth DC superimposed — the kind a variable-speed drive or LED driver can generate. If your load includes single-phase rectifiers, you need type A, not type AC. Rated at 40 A and 400 V AC, this RC unit matches a 40 A 4-pole 5SL4 MCB. The 30 mA trip handles the leakage path to earth. Installation depth is 70 mm. Mounting position is unrestricted, so it can sit horizontally or inverted in a tight enclosure — useful when you're packing a sub-distribution board. ## Integration and deployment This is an electronic RC unit designed to clip onto the load side of a 5SL4 miniature circuit breaker. The supply feeds in at the top, above the MCB. It is not a standalone RCD — it requires the matching 5SL4 breaker to provide overcurrent and short-circuit protection. The assembly saves one module width compared to separate RCD + MCB units. The unit is instantaneous (no short-time delay), so it trips immediately on fault — not suitable for selective coordination with downstream RCDs. The 5SM9343-6 carries a current lifecycle status from Siemens, meaning it remains in the active catalog for new designs and replacement orders. No phase-out or last-time-buy notice is associated with this order code.","metaTitle":"Siemens 5SM9343-6 SENTRON RC Unit, Type A, 40 A, 30 mA, 4P","metaDescription":"Siemens 5SM9343-6 SENTRON residual current unit for 5SL4 MCB. Type A, 40 A rated, 30 mA trip, 4-pole, 400 V AC, 6 kA. Current lifecycle. 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","Width":"54 mm","title":"5SM9343-6","Height":"100 mm","Maximum":"55 °C","Minimum":"-25 °C","Rated Value":"50 Hz","description":"RC unit for 5SL4, 4-pole, type A, 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 A, 0.3...40 A, 4P, 30 mA","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Product Designation":"RC unit electronic for 5SL4","acc. to IEC 81346-2":"F","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"A","acc. to DIN EN 61346-2":"F","Number Of Modular Width Units":"3","Product Feature / Silicon-Free":"Yes","acc. to EN 60898 / rated value":"6 kA","Position / Of Power Supply Cord":"Top, above miniature circuit breaker","Tripping Fault Current / Rated Value":"30 mA","supply voltage / at AC / rated value":"400 V","Surge Current Resistance / Rated Value":"3 kA","according to IEC 61008-1 / rated value":"6 kA","Switching Function / Short-Term Delayed":"No","operational current / at AC / rated value":"40 A","Supply Voltage / For Testing Equipment / Minimum":"125 V","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/4441acc59367143c24c9fdeefe031908.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629193&mlfb=5SM9343-6"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SM9343-6?","answer":"The 5SM9343-6 is sourced and quoted to order against an RFQ through independent distribution channels. Submit an RFQ for current pricing and availability; these are confirmed at quote time."},{"question":"What is 5SM9343-6's listed depth (70 mm) on this component line?","answer":"The 5SM9343-6 has a listed depth of 70 mm and an installation depth of 70 mm, matching the standard depth for SENTRON modular devices on DIN rail."},{"question":"What is 5SM9343-6's listed width (54 mm) on this component line?","answer":"The 5SM9343-6 has a listed width of 54 mm, corresponding to 3 modular width units (each 18 mm) per DIN 43880."},{"question":"Will 5SM9343-6 drop into a panel that was specified around 5SJ6325-7RC without rewiring?","answer":"No, the 5SM9343-6 is an RC unit for a 5SL4 MCB, while the 5SJ6325-7RC is a standalone 3-pole miniature circuit breaker. They serve different functions and are not drop-in interchangeable. The 5SM9343-6 requires a mating 5SL4 breaker to form a combined RCD/MCB."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM9343-6","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/5SM9343-6 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}}