{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM9426-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM9426-0","canonicalUrl":"https://aoctrl.com/siemens/5SM9426-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM9426-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM9426-0 RC unit electronic for 5SL4, 2-pole, type AC, In: 63 A, 100 mA, Un AC: 400 V, DIN rail mount.","salesMarkdown":"The Siemens 5SM9426-0 is a SENTRON residual current (RC) unit — the electronic trip module that pairs with a 5SL4 miniature circuit breaker to form a combined RCD/MCB (RCBO) assembly. It is a 2-pole, type AC device rated at 63 A with a 100 mA residual tripping threshold, supplied at 230/400 V AC. It clips to the top of a 5SL4 miniature circuit breaker — the supply feeds in from above, through the RC unit, then to the MCB below. The assembly fits enclosures meeting DIN 43880 size 1. Terminal torque is 2.5 to 3 N·m. The IP20 rating applies only when the distribution board is installed with conductors connected — bare units on the bench are not touch-safe. ## Wire sizing and termination Accepts solid conductors from 0.75 to 35 mm² and stranded conductors from 0.75 to 25 mm². This range covers most sub-main and feeder circuits up to 63 A. The screw terminals are rated for the full 63 A continuous current without derating at the 55 °C ambient upper limit.","metaTitle":"Siemens 5SM9426-0 SENTRON RC Unit, 2P 63A 100mA AC","metaDescription":"Siemens 5SM9426-0 SENTRON residual current unit for 5SL4 MCB. 2-pole, type AC, 63 A, 100 mA, 230/400 V. DIN rail mount, IP20. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","title":"5SM9426-0","Height":"100 mm","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","description":"RC unit for 5SL4, 2-pole, type AC, In: 63 A, 100 mA, Un AC: 400 V","Mounting type":"Standard rail mounting","During Storage":"-40 ... +75 °C","Number of poles":"2","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product variations":"DI unit, type AC, 0.3...63 A, 2P, 100 mA","Ambient temperature":"-25 ... +55 °C","Product designation":"RC unit electronic for 5SL4","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Number of width units":"2","Type of fault current":"AC","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SM9","Current / at AC / rated value":"63 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"Top, above miniature circuit breaker","Supply voltage / at AC / rated value":"230/400 V","Surge current resistance / rated value":"3 kA","Switching function / short-term delayed":"No","Tripping residual current / rated value":"100 mA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Size of installation devices / acc. to DIN 43880":"1","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/5b86bd4bec9a7c14c52b09c162c45704.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629201&mlfb=5SM9426-0"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SM9426-0?","answer":"Submit an RFQ against this order code. The part is sourced through independent distribution; pricing and stock levels are confirmed at quote time and are not published here."},{"question":"Will 5SM9426-0 drop into a panel specified around 5SL6563-7BB?","answer":"No, it will not drop in as a direct mechanical substitute. The 5SM9426-0 is an RC unit designed to clip onto a 5SL4 MCB, while the 5SL6563-7BB is a standalone miniature circuit breaker. The 5SM9426-0 has a 70 mm depth and 36 mm width versus the 5SL6563-7BB's 76 mm depth and 36 mm width, but the mounting interface and function are different — one is a residual current module, the other a complete MCB. Rewiring would be required."},{"question":"What is the listed depth and solid conductor range for 5SM9426-0?","answer":"Depth is 70 mm. Solid conductor range is 0.75 to 35 mm². Stranded range is 0.75 to 25 mm²."},{"question":"What compliance documentation does Siemens provide for 5SM9426-0?","answer":"The part carries overvoltage category III per IEC/EN 60947. It is silicon-free and identified per DIN EN 61346-2 and DIN EN 81346-2 as function letter F. The IP20 rating is conditional on installation in a distribution board with connected conductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM9426-0","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/5SM9426-0 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}}