{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3346-6LA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3346-6LA","canonicalUrl":"https://aoctrl.com/siemens/5SM3346-6LA","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3346-6LA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 4-pole, Type A, In: 63 A, 30 mA, Un AC: 400 V, with thermal overload protection, DIN rail mount.","salesMarkdown":"The Siemens 5SM3346-6LA is a 4-pole SENTRON residual current circuit breaker (RCCB) rated for 63 A at 400 V AC, with a 30 mA Type A fault-current trip and built-in thermal overload protection. It's an instantaneous design — no intentional short-time delay — so it clears ground faults the moment they exceed the 30 mA threshold. The Type A designation means it catches both sinusoidal AC fault currents and pulsed DC fault currents up to 1 kHz, which covers most modern electronics and variable-speed drives that generate smooth DC ripple. The 63 A continuous rating at 400 V AC three-phase means this RCCB handles the full load of a typical sub-distribution board feeding lighting, socket outlets, and general power circuits. The 30 mA residual trip provides shock protection per IEC 60364 — it'll clear a fault before heart fibrillation becomes a risk. The 0 kA short-circuit current rating is critical: this device is NOT rated to interrupt high fault currents on its own. In practice, you install it downstream of a suitably rated MCB or as part of an RCBO assembly. Tighten to 2.5 to 3 N·m. Ambient range is -25 to +45 °C operating, -40 to +75 °C storage, which covers most indoor electrical rooms and conditioned enclosures.","metaTitle":"Siemens 5SM3346-6LA SENTRON RCCB, 4-Pole Type A, 63A 30mA 40","metaDescription":"Siemens 5SM3346-6LA SENTRON RCCB, 4-pole Type A, 63A rated current, 30mA trip, 400V AC. Active production. Available to order. Quoted on request.","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":"Instantaneous","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":"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":"1 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":"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=202556&mlfb=5SM3346-6LA","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3346-6LA/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3346-6LA?","answer":"The 5SM3346-6LA is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What's the difference between 5SM3346-6LA and 5SU9304-1KK32?","answer":"The 5SU9304-1KK32 is a 2-pole RCBO (RCD + MCB) rated 32 A Type AC with a C-curve overcurrent trip and 10 kA breaking capacity, while the 5SM3346-6LA is a 4-pole RCCB rated 63 A Type A with no overcurrent protection and 0 kA SCCR. They serve different roles: the RCBO is a combined device for final circuits, the RCCB is a main or sub-main residual current switch that must be backed up by an upstream breaker."},{"question":"Will 5SM3346-6LA drop into a panel specified for 5SU9304-1KK32?","answer":"No — the 5SM3346-6LA is a 4-pole RCCB occupying 4 width units (72 mm), while the 5SU9304-1KK32 is a 2-pole RCBO occupying 1 width unit (18 mm). The footprint, wiring scheme, and function are completely different. You cannot swap one for the other without rewiring and reconfiguring the panel."},{"question":"What compliance documentation does Siemens provide for 5SM3346-6LA?","answer":"As a standard SENTRON catalogue product, the 5SM3346-6LA carries CE marking for the European market and is manufactured under Siemens' ISO 9001 quality system. Specific declarations (RoHS, REACH) are available from Siemens on request. The product is silicon-free and designed for Overvoltage Category III."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3346-6LA","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/5SM3346-6LA 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}}