{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9346-1CR40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9346-1CR40","canonicalUrl":"https://aoctrl.com/siemens/5SU9346-1CR40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9346-1CR40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9 series, RCD-operated circuit breaker, 4-pole (3P+N), 40 A rated, C tripping characteristic, 6 kA breaking capacity, AC fault current type.","salesMarkdown":"## What you're looking at The Siemens SENTRON 5SU9346-1CR40 is a 4-pole RCD-operated circuit breaker — an RCBO — combining overcurrent protection and residual current detection in one 7-MU-wide DIN-rail module. It's rated 40 A with a C tripping curve and 6 kA breaking capacity per EN 60898, handling AC fault currents only. That C-curve means it's sized for motor and transformer inrush: holds through 5-10x rated current for a short window, then trips fast on a hard short. The 6 kA SCCR at 400 V AC is enough for most distribution boards downstream of a larger upstream breaker; if your panel's prospective fault current exceeds that, you'll need a current-limiting upstream device to keep the 5SU9 in its coordination zone. Derate as the cabinet warms: 37.2 A at 40 °C, 35.6 A at 45 °C, 34.8 A at 50 °C, 34 A at 55 °C. If your panel runs hot — say, a packed enclosure with drives — the 40 A nameplate effectively becomes a 35 A breaker at 45 °C. The 6 kA breaking capacity is identical under both EN 60898 and IEC 60947-2, so it's rated for both residential and industrial coordination studies. Terminal capacity accepts 0.75 to 35 mm² solid or stranded, which covers everything from 1.5 mm² lighting circuits up to 10 mm² feeder tails. The 7 width units (126 mm) mean it occupies seven 18 mm slots — check your rail budget if the enclosure is tight. Supply can land on either top or bottom terminals; no mandatory orientation. Touch protection is built into the terminal design, so no additional finger-duct covers needed inside the distribution board.","metaTitle":"Siemens SENTRON 5SU9346-1CR40 RCD Circuit Breaker, 40A C-Cur","metaDescription":"Siemens SENTRON 5SU9346-1CR40 4-pole RCBO, 40A rated, C tripping curve, 6kA breaking capacity per EN 60898. AC fault current type, IP20. Current production. Sourced to order agains","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Solid":"0.75 ... 35 mm²","Width":"126 mm","title":"5SU9346-1CR40","Height":"90 mm","Maximum":"2.25 W","Stranded":"0.75 ... 35 mm²","at 30 Cel":"40 A","at 40 Cel":"37.2 A","at 45 Cel":"35.6 A","at 50 Cel":"34.8 A","at 55 Cel":"34 A","description":"RCBO, 6 kA, 3P+N, Type AC, 30 mA, C-Char, In: 40 A, Un AC: 400 V","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °C","Product designation":"RCD-operated circuit breaker","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Energy limiting class":"3","Number of width units":"7","Type of fault current":"AC","Number of poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU9","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"6 kA","For Testing Equipment / Minimum":"125 V","Position / of power supply cord":"Either top or bottom","Number of poles / with protection":"3","acc. to IEC 60947-2 / rated value":"6 kA","Product feature / Touch protection":"Yes","Supply voltage frequency / rated value":"50 Hz","Tripping residual current / rated value":"30 mA","Influence of the surrounding temperature":"Max. 95% humidity","Surge current resistance / at (8/20) μs":"1 kA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Product function / neutral conductor switching":"Yes","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/5c8f59cc7fed4e5218454fcf38fe12f5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629317&mlfb=5SU9346-1CR40"},"ai":{"faq":[{"question":"What is the closest functional second-source to 5SU9346-1CR40?","answer":"The 5SL3625-7MB is a different class — a miniature circuit breaker without residual current protection. The 5SU9346-1CR40 is an RCBO combining overcurrent and RCD in one unit. They are not drop-in substitutes; the 5SL series lacks the RCD function entirely."},{"question":"What compliance documentation does Siemens provide for 5SU9346-1CR40?","answer":"The part carries EN 60898 and IEC 60947-2 ratings, and is classified per DIN EN 61346-2 and DIN EN 81346-2. It is halogen-free and silicon-free. Specific RoHS/REACH declarations are available from Siemens on request."},{"question":"Where can I buy 5SU9346-1CR40 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9346-1CR40","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/5SU9346-1CR40 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}}