{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3446-6LA01","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3446-6LA01","canonicalUrl":"https://aoctrl.com/siemens/5SM3446-6LA01","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3446-6LA01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 4-pole, Type A, short-time delayed, In: 63 A, IΔn: 100 mA, Un AC: 400 V, 10 kA SCCR, DIN rail mount.","salesMarkdown":"The 100 mA trip threshold puts it in the 'fire-protection' band rather than 'personnel-protection' (30 mA) — it is sized to cover cable insulation faults and arcing in fixed equipment where a lower sensitivity would cause unwanted trips from leakage in long runs or industrial gear. Type A detects sinusoidal AC and pulsating DC residual currents. Overvoltage category III confirms it is rated for fixed-installation distribution boards, not just downstream equipment. ## Mounting and integration into a DIN-rail board The screw terminals accept solid or stranded copper from 1.5 mm² up to 25 mm² — enough for the 63 A feed conductors — with a tightening torque range of 2.5 to 3 N·m. IP20 with conductors connected is the standard for enclosed distribution boards — no special sealing needed inside a rated panel. Finger and back-of-hand safe construction means the terminals are touch-safe when installed per the manufacturer's instructions.","metaTitle":"Siemens 5SM3446-6LA01 SENTRON RCCB 4P 63A 100mA 400V AC Type","metaDescription":"Siemens 5SM3446-6LA01 SENTRON RCCB, 4-pole, Type A, short-time delayed, 63 A, 100 mA, 400 V AC, 10 kA SCCR. Current lifecycle. 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":"10 kA","Current / at AC / rated value":"63 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":"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":"100 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=6095&mlfb=5SM3446-6LA01","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3446-6LA01/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 5SM3446-6LA01?","answer":"63 A rated current, 100 mA residual trip sensitivity, 400 V AC rated voltage, 10 kA short-circuit current rating, Type A fault current detection, short-time delayed, 4-pole, for 50 Hz systems."},{"question":"What wire sizes does the 5SM3446-6LA01 accept?","answer":"The screw terminals accept solid and stranded copper conductors from 1.5 mm² up to 25 mm². Tightening torque is 2.5 to 3 N·m."},{"question":"Will the 5SM3446-6LA01 drop into a panel built for the 5SY4304-7CV?","answer":"Not directly. The 5SM3446-6LA01 is a 4-pole RCCB occupying 4 width units, while the 5SY4304-7CV is a 3-pole MCB on 3 width units. The DIN-rail footprint and function differ — one is an earth-leakage device, the other an overcurrent breaker. Panel layout and busbar arrangement would need adjustment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3446-6LA01","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/5SM3446-6LA01 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}}