{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3445-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3445-0","canonicalUrl":"https://aoctrl.com/siemens/5SM3445-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3445-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3445-0 RCCB, 4-pole, type AC, 125 A, 100 mA, 400 V AC, 50 Hz, 10 kA SCCR, DIN rail mount, IP20.","salesMarkdown":"It operates on a 400 V AC, 50 Hz supply and carries a 10 kA short-circuit current rating (SCCR) per IEC 61008-1 and EN 60898. This is an instantaneous-trip device — no intentional short-time delay on the residual current path — so it clears fast on a ground fault. Installation depth is 70 mm; the overall depth including the front face is 77 mm. Mounting position is unrestricted — vertical, horizontal, or inverted — which simplifies panel layout when the busbar run forces an orientation. The device is silicon-free, which avoids outgassing issues in sealed or sensitive electronic compartments.","metaTitle":"Siemens SENTRON 5SM3445-0 RCCB, 4P, 125 A, 100 mA, Type AC","metaDescription":"Siemens SENTRON 5SM3445-0 4-pole RCCB, 125 A rated, 100 mA trip, type AC, 10 kA SCCR, 50 Hz, DIN rail mount. Current lifecycle stage. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"72 mm","Height":"90 mm","Maximum":"45 °C","Minimum":"-5 °C","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"DIN rail (REG)","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Operating Frequency":"50 Hz","Product Designation":"RCCB","at AC / rated value":"125 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"AC","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"4","Product Feature / Silicon-Free":"Yes","For Testing Equipment / Minimum":"195 V","Position / Of Power Supply Cord":"top or bottom","according to EN 60898 / rated value":"1.25 kA","Tripping Fault Current / Rated Value":"100 mA","Supply Voltage Frequency / Rated Value":"50 Hz","Surge Current Resistance / Rated Value":"1 kA","according to IEC 61008-1 / rated value":"1.25 kA","Switching Function / Short-Term Delayed":"No","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=92979&mlfb=5SM3445-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3445-0/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SM3445-0 depth and width for panel layout?","answer":"Overall depth is 77 mm, installation depth is 70 mm, width is 72 mm (4 modular units), height is 90 mm."},{"question":"Will 5SM3445-0 drop into a panel specified around 5SL4363-7 without rewiring?","answer":"No — the 5SL4363-7 is a 3-pole miniature circuit breaker (MCB), not an RCCB. The 5SM3445-0 is a 4-pole residual current device with a different function, different wiring (line and neutral through the device), and a wider 72 mm footprint versus the 54 mm of the 5SL4363-7. They are not drop-in interchangeable."},{"question":"Where can I buy 5SM3445-0 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3445-0","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/5SM3445-0 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}}