{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3346-6LA01","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3346-6LA01","canonicalUrl":"https://aoctrl.com/siemens/5SM3346-6LA01","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3346-6LA01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 4-pole, type A, short-time delayed, In: 63 A, IΔn: 30 mA, Un AC: 400 V, with thermal overload protection, DIN rail mount.","salesMarkdown":"The Type A designation means it detects pulsating DC fault currents, not just pure AC sine-wave faults, so it covers modern electronics like variable-speed drives, LED drivers, and switching power supplies that generate half-wave rectified leakage. The short-time delayed characteristic means this unit won't trip on transient inrush or brief capacitive leakage — it's built for circuits with a known start-up surge, like motor feeders or capacitor banks, where a standard instantaneous RCCB would nuisance-trip. The thermal overload protection adds a bimetallic element that tracks the load current and trips on sustained overcurrent, combining residual current and overload protection in one device. The 63 A rating at 400 V AC three-phase means this RCCB handles the full load of a moderate sub-distribution board — think lighting circuits, socket outlets, or a small machine supply. The 30 mA residual trip is the standard for socket-outlet circuits and general wet-location protection per IEC 60364. The Type A waveform coverage is mandatory in many European installations where single-phase electronic loads are present — a standard Type AC RCCB may not detect the pulsating DC fault from a failed rectifier. The short-time delay gives you selectivity with downstream 30 mA RCCBs: the downstream unit trips first on a ground fault, leaving this one closed to keep the rest of the board live. Terminals accept solid or stranded conductors from 1.5 to 25 mm² — that's enough for the 63 A feed (typically 16 mm² Cu) and the outgoing circuits. Tightening torque is 2.5 to 3 N·m, standard for screw-type terminals in this class. The unit occupies 4 width units at 70 mm installation depth, so it fits a standard 4-module DIN-rail slot in any distribution board.","metaTitle":"Siemens 5SM3346-6LA01 SENTRON RCCB, 4P, 63A, 30mA, Type A, S","metaDescription":"Siemens 5SM3346-6LA01 SENTRON RCCB, 4-pole, Type A, short-time delayed, 63 A rated, 30 mA trip, 400 V AC, 10 kA SCCR. Current production. Quoted to order.","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":"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=7369&mlfb=5SM3346-6LA01","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3346-6LA01/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between this 5SM3346-6LA01 and a standard 5SY series MCB like 5SY4304-7CV?","answer":"The 5SM3346-6LA01 is a 4-pole RCCB (residual current device) with 63 A rating, 30 mA trip, and Type A fault detection — it protects against ground faults and provides overload protection. The 5SY4304-7CV is a 3-pole MCB (miniature circuit breaker) with a 4 A C-curve trip characteristic and 15 kA breaking capacity per IEC 60947-2, designed for overcurrent and short-circuit protection only. They serve different functions: the RCCB goes upstream of the MCB in a distribution board, or they can be combined in a single unit (RCBO). They are not direct substitutes — the 5SM3346-6LA01 handles ground-f"},{"question":"What conductor sizes does the 5SM3346-6LA01 accept?","answer":"The terminals accept solid and stranded conductors from 1.5 mm² up to 25 mm². Tightening torque is 2.5 to 3 N·m."},{"question":"Where can I buy 5SM3346-6LA01 and how is it quoted?","answer":"This is a current-production Siemens SENTRON part sourced through independent distribution. It is quoted to order against an RFQ — availability and current pricing are confirmed at quote time. No stock count or lead-time number is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3346-6LA01","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/5SM3346-6LA01 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}}