{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3344-6LA01","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3344-6LA01","canonicalUrl":"https://aoctrl.com/siemens/5SM3344-6LA01","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3344-6LA01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3344-6LA01, 4-pole RCCB, Type A, short-time delayed, In 40 A, IΔn 30 mA, Un 400 V AC, with thermal overload protection, DIN rail mount.","salesMarkdown":"The Siemens SENTRON 5SM3344-6LA01 is a 4-pole residual current circuit breaker (RCCB) rated 40 A at 400 V AC, with a 30 mA trip threshold and Type A fault current sensitivity. It includes built-in thermal overload protection and a short-time delayed switching function, meaning it withstands brief inrush or surge currents without nuisance tripping — useful on circuits feeding motor drives or switching power supplies that draw a momentary charge pulse. The 30 mA residual trip covers personnel protection (hand-to-hand or hand-to-ground fault paths) per IEC 60364. Type A detection catches pulsating DC fault currents from rectifiers and single-phase drives — a step above plain AC-sensitive Type AC units. The short-time delay (typically 10 ms) provides selectivity with downstream 30 mA instantaneous RCCBs, so a fault on a branch trips the branch device, not this upstream main. The 40 A continuous rating and 400 V line-to-line voltage suit a 3-phase sub-distribution board feeding mixed lighting, socket, and small-motor circuits. Snaps onto DIN rail (REG profile) and occupies 4 width units (roughly 72 mm at 18 mm per unit). Installation depth is 70 mm — fits standard distribution boards. Terminals accept solid or stranded conductors from 1.5 mm² up to 25 mm², tightened to 2.5–3 N·m. The housing is IP20 once the distribution board is closed and conductors are connected; finger and back-of-hand safe per the protection class. Ambient range is -25 to +45 °C; storage range -40 to +75 °C.","metaTitle":"Siemens 5SM3344-6LA01 SENTRON RCCB, 4P, 40 A, 30 mA, Type A","metaDescription":"Siemens SENTRON 5SM3344-6LA01 RCCB, 4-pole, Type A, short-time delayed, 40 A, 30 mA, 400 V AC. Active production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Solid":"1.5 ... 25 mm²","Stranded":"1.5 ... 25 mm²","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","During Storage":"-40 ... +75 °C","Number of poles":"4","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product variations":"With thermal overload protection","Ambient temperature":"-25 ... +45 °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":"Short-time delayed","Number of width units":"4","Type of fault current":"A","circuit-breaker / Design":"5SM3","Short-circuit current rating":"0 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":"400 V","Surge current resistance / rated value":"3 kA","Switching function / short-term delayed":"Yes","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=293098&mlfb=5SM3344-6LA01","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3344-6LA01/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3344-6LA01 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing."},{"question":"What wire sizes does the 5SM3344-6LA01 accept?","answer":"The terminals accept solid conductors from 1.5 mm² to 25 mm² and stranded conductors from 1.5 mm² to 25 mm²."},{"question":"Will 5SM3344-6LA01 drop into a panel specified around 5SY4304-7CV without rewiring?","answer":"No — the 5SY4304-7CV is a 3-pole MCB (miniature circuit breaker) with a different function and pole count. The 5SM3344-6LA01 is a 4-pole RCCB. They are not drop-in interchangeable; the panel design must match the device type and number of poles."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3344-6LA01","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/5SM3344-6LA01 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}}