{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM9446-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM9446-0","canonicalUrl":"https://aoctrl.com/siemens/5SM9446-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM9446-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM9446-0, RC unit electronic for 5SL4, 4-pole, type AC, 63 A, 100 mA, Un AC 400 V, 6 kA, 3 MW, IP20.","salesMarkdown":"The Siemens 5SM9446-0 is a SENTRON residual current (RC) unit, type AC, designed as a companion module for the 5SL4 miniature circuit breaker. It provides earth leakage protection on 4-pole circuits up to 63 A rated current, with a 100 mA trip sensitivity and a rated voltage of 400 V AC. It is an instantaneous device — no intentional short-time delay — so it clears ground faults within the standard response time for personnel protection. Installation depth is 70 mm. The supply connects at the top, above the 5SL4 MCB.","metaTitle":"Siemens 5SM9446-0 SENTRON RC Unit, 4P, 63 A, 100 mA, 400 V A","metaDescription":"Siemens 5SM9446-0 SENTRON residual current unit for 5SL4 MCB. 4-pole, type AC, 63 A rated, 100 mA sensitivity, 400 V AC. 6 kA breaking capacity. Current production. Available to or","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Width":"54 mm","Height":"100 mm","Maximum":"55 °C","Minimum":"-25 °C","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Standard rail mounting","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Variations":"DI unit, type AC, 0.3...63 A, 4P, 100 mA","Product Designation":"RC unit electronic for 5SL4","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Product Feature Silicon-Free":"Yes","Number Of Modular Width Units":"3","Position Of Power Supply Cord":"Top, above miniature circuit breaker","according to EN 60898 rated value":"6 kA","according to IEC 61008-1 rated value":"6 kA","Switching Function Short-Term Delayed":"No","value range of the supply voltage at AC":"230/400 V","Ambient Temperature During Storage Minimum":"-40 °C","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"125 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"No","for rated value of the current at AC in hot operating state per pole":"9.1 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cbc383a589b59c8d25e8adf6e6d96105.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629204&mlfb=5SM9446-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM9446-0/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SM9446-0 used for?","answer":"It is a residual current unit (type AC) that mates with the 5SL4 miniature circuit breaker to provide combined overcurrent and earth leakage protection on 4-pole circuits up to 63 A, 400 V AC, with 100 mA sensitivity."},{"question":"What are the key ratings of 5SM9446-0?","answer":"Rated current 63 A, sensitivity 100 mA, rated voltage 400 V AC, breaking capacity 6 kA per EN 60898 and IEC 61008-1, 4 poles, type AC, instantaneous."},{"question":"Where can I buy 5SM9446-0?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quoting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM9446-0","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/5SM9446-0 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}}