{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3314-0LA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3314-0LA","canonicalUrl":"https://aoctrl.com/siemens/5SM3314-0LA","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3314-0LA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series, RCCB, 2-pole, 40 A, 30 mA, type AC, 230 V AC, 10 kA, DIN rail.","salesMarkdown":"The Siemens SENTRON 5SM3314-0LA is a 2-pole residual current operated circuit breaker (RCCB) rated 40 A at 230 V AC, with a 30 mA trip threshold and type AC sensitivity for sinusoidal AC fault currents. It includes built-in thermal overload protection, making it a combined RCCB/overload device in a single 2-module-width DIN-rail housing. The 40 A rated current and 30 mA trip sensitivity are the two numbers that decide whether this RCCB fits your sub-distribution board. 40 A is a common main or feeder rating for a lighting or general-purpose final circuit in a residential or light commercial panel. The 30 mA trip provides personal protection against direct contact — it's the standard threshold for socket-outlet circuits and general-purpose protection in most IEC-based installations. That covers the majority of resistive and inductive loads (heaters, motors, lighting), but not pulsed DC or smooth DC fault currents from electronics, variable-speed drives, or EV chargers. For those loads you would need a type A or type B RCCB. The 2-pole construction switches both line and neutral, which is standard for single-phase 230 V AC circuits. The 2-module-width (36 mm) footprint on DIN rail fits standard distribution board spacing — it takes up two adjacent 18 mm positions. ## Installation notes Mounts on DIN rail (REG) in any position. The installation depth is 70 mm, which fits standard distribution board enclosures. Terminals accept solid or stranded conductors from 1 to 16 mm², with a tightening torque of 2.5 to 3 N·m for screw-type terminals.","metaTitle":"Siemens SENTRON 5SM3314-0LA RCCB, 40 A, 30 mA, 2-Pole, Type","metaDescription":"Siemens SENTRON 5SM3314-0LA 2-pole RCCB, 40 A rated, 30 mA trip, type AC, 230 V, 10 kA SCCR, DIN rail mount. Active lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Solid":"1 ... 16 mm²","Stranded":"1 ... 16 mm²","Rated Value":"50 Hz","Wertebereich":"-5 ... +45 °C","Mounting type":"DIN rail (REG)","Number of poles":"2","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product variations":"With thermal overload protection","Ambient temperature":"-40 ... +75 °C","Operating frequency":"50Hz","Product designation":"RCCB","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","circuit-breaker / Design":"5SM3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"40 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"top or bottom","Protection against electrical shock":"Finger and back-of-hand safe","Supply voltage / at AC / rated value":"230 V","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":"195 V","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=90300&mlfb=5SM3314-0LA","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3314-0LA/alternatives.json"},"ai":{"faq":[{"question":"What is 5SM3314-0LA used for?","answer":"It is a 2-pole residual current circuit breaker (RCCB) with thermal overload protection, rated 40 A, 30 mA, type AC, 230 V, used for personal protection and overcurrent protection in single-phase final circuits in distribution boards."},{"question":"Where can I buy 5SM3314-0LA?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of 5SM3314-0LA?","answer":"Rated current 40 A, rated residual current 30 mA, type AC, rated voltage 230 V AC, short-circuit current rating 10 kA, 2-pole, DIN rail mount, 2 width units."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3314-0LA","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/5SM3314-0LA when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}