{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM9333-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM9333-0","canonicalUrl":"https://aoctrl.com/siemens/5SM9333-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM9333-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM9333-0, RC unit for 5SL4, 3-pole, type AC, In: 40 A, IΔn: 30 mA, Un AC: 400 V, DIN rail mount, IP20.","salesMarkdown":"The Siemens 5SM9333-0 is a SENTRON residual current (RC) unit designed as a companion for the 5SL4 miniature circuit breaker. It is a 3-pole, type AC device rated at 40 A with a 30 mA tripping residual current, operating at 400 V AC, 50 Hz. This combination — an RC unit paired with an MCB — provides both overcurrent and earth-fault protection in a single DIN-rail assembly, commonly used in final distribution boards in commercial and residential infrastructure. The 40 A rated current and 30 mA residual sensitivity define the protection envelope: 40 A matches the upstream MCB or load capacity, while 30 mA is the standard threshold for personal protection against indirect contact in TN and TT systems. For circuits with rectifiers, VFDs, or switched-mode supplies, a type A or F RC unit would be required. The 3 kA surge current resistance indicates the unit can withstand transient overcurrents without nuisance tripping, which is typical for RC units paired with MCBs. The mechanical service life of 10 000 switching cycles is standard for this class of device and sufficient for normal distribution panel operation. Conductor termination accepts solid conductors from 0.75 to 35 mm² and stranded from 0.75 to 25 mm², with a tightening torque of 2.5 to 3 N·m. This range covers most final-circuit wiring sizes up to 35 mm², which is adequate for 40 A circuits. The supply connection is at the top, above the miniature circuit breaker.","metaTitle":"Siemens 5SM9333-0 SENTRON RC Unit, 40 A, 30 mA, 3P, Type AC","metaDescription":"Siemens 5SM9333-0 SENTRON RC unit for 5SL4 MCB, 3-pole type AC, 40 A rated current, 30 mA residual current, 400 V AC. IP20, DIN rail mount. 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","Solid":"0.75 ... 35 mm²","Width":"54 mm","title":"5SM9333-0","Height":"100 mm","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","description":"RC unit for 5SL4, 3-pole, type AC, In: 40 A, 30 mA, Un AC: 400 V","Mounting type":"Standard rail mounting","During Storage":"-40 ... +75 °C","Number of poles":"3","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product variations":"DI unit, type AC, 0.3...40 A, 3P, 30 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":"3","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":"40 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"Top, above miniature circuit breaker","Supply voltage / at AC / rated value":"400 V","Surge current resistance / rated value":"3 kA","Switching function / short-term delayed":"No","Tripping residual current / rated value":"30 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/cfd2ef4197b67d4e70d51d4eb08cf163.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629184&mlfb=5SM9333-0"},"ai":{"faq":[{"question":"Where can I buy 5SM9333-0 and how do I get a price?","answer":"The 5SM9333-0 is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability."},{"question":"When sourcing 5SM9333-0, what's the closest functional second-source — 5SL4363-7?","answer":"The 5SL4363-7 is a 3-pole miniature circuit breaker (MCB) from the same SENTRON family, not an RC unit. It cannot serve as a functional second-source for the 5SM9333-0 RC unit because the 5SM9333-0 provides residual current protection that the 5SL4363-7 does not. They are designed to be paired together on the DIN rail, not substituted for each other."},{"question":"What is 5SM9333-0's listed depth (70 mm) on this component line?","answer":"The installation depth is 70 mm, and the overall depth is also 70 mm."},{"question":"What is 5SM9333-0's listed solid (0.75... 35 mm²) on this component line?","answer":"The solid conductor range is 0.75 to 35 mm²."},{"question":"Will 5SM9333-0 drop into a panel that was specified around 5SL4363-7 without rewiring?","answer":"Yes, the 5SM9333-0 mounts on the same DIN rail and occupies the same 3 width units (54 mm) as the 5SL4363-7. The supply position is at the top, above the MCB, matching the typical wiring arrangement. No rewiring of the busbar or load conductors is required if the panel was designed for a 5SL4 MCB with an RC unit."},{"question":"What compliance documentation does this brand provide for 5SM9333-0 (RoHS, REACH, UL, IEC)?","answer":"The product carries the SENTRON brand and is designed to DIN EN 61346-2 and DIN EN 81346-2 standards. It is rated for overvoltage category III and is silicon-free. For specific RoHS, REACH, UL, or IEC declarations, refer to the manufacturer's documentation available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM9333-0","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/5SM9333-0 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}}