{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3446-0LA01","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3446-0LA01","canonicalUrl":"https://aoctrl.com/siemens/5SM3446-0LA01","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3446-0LA01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series, 4-pole RCCB type AC, short-time delayed, In 63 A, IΔn 100 mA, Un AC 230 V, DIN rail mount.","salesMarkdown":"The 100 mA sensitivity makes it suitable for circuits where a higher trip threshold is needed to avoid nuisance tripping from leakage currents — think longer cable runs or equipment with inherent leakage, while still providing personnel protection against direct contact. The short-time delayed design (type S or selective) coordinates with downstream RCCBs, letting the closer device trip first on a fault and keeping this unit as backup — essential for selectivity in multi-level distribution. Snaps onto standard DIN rail (REG), occupies 4 width units (about 72 mm). Installation depth is 70 mm. Terminals accept solid or stranded conductors from 1.5 to 25 mm²; tighten to 2.5–3 N·m. Rated IP20 with the distribution board installed and conductors connected — it's a panel-internal device, not for wet or outdoor locations. The built-in thermal overload protection adds a layer of backup for sustained overcurrents, though this is an RCCB, not an MCB — it's not rated for short-circuit interruption (0 kA SCCR). Upstream overcurrent protection is required.","metaTitle":"Siemens 5SM3446-0LA01 SENTRON RCCB, 4P, 63A, 100mA, Type AC","metaDescription":"Siemens SENTRON 5SM3446-0LA01 4-pole RCCB, 63 A rated current, 100 mA trip residual, type AC, short-time delayed, DIN rail mount. Current 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":"1.5 ... 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":"-5 ... +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":"AC","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":"230 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=418816&mlfb=5SM3446-0LA01","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3446-0LA01/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 5SM3446-0LA01?","answer":"4-pole RCCB, type AC, short-time delayed, rated 63 A, 100 mA trip residual, 230 V AC, 50 Hz. Conductor range 1.5–25 mm² solid or stranded."},{"question":"Where can I buy 5SM3446-0LA01?","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":"Will 5SM3446-0LA01 drop into a panel specified around 5SY4304-7CV?","answer":"Not directly — the 5SY4304-7CV is a 3-pole MCB (miniature circuit breaker) with a different function (overcurrent/short-circuit protection) and form factor (3 width units). The 5SM3446-0LA01 is a 4-pole RCCB (earth fault protection) occupying 4 width units. They serve different protection roles and have different footprints."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3446-0LA01","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/5SM3446-0LA01 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}}