{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3645-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3645-0","canonicalUrl":"https://aoctrl.com/siemens/5SM3645-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3645-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3645-0, 4-pole RCCB, type AC, In 125 A, IΔn 300 mA, Un AC 400 V, 10 kA SCCR, DIN rail mount.","salesMarkdown":"The Siemens 5SM3645-0 is a SENTRON residual current circuit breaker (RCCB), 4-pole, type AC, rated 125 A with 300 mA sensitivity on a 400 V AC supply. It's an instantaneous-trip device — no intentional delay — so it clears ground faults on the first half-cycle, which is what you want for personnel protection in a distribution board. That's standard for a domestic or light commercial panel; if your available fault current is higher, the RCCB needs an upstream backup fuse or MCB rated to coordinate. IP20 with the distribution board installed and conductors connected. That's expected for a panel-mount device — no special gasketing, no washdown rating. The silicon-free construction matters if this board is in a painting or coating line where silicone outgassing causes fisheyes. Rated per EN 60898 and IEC 61008-1, both at 1.25 kA. Overvoltage category III, ambient range -5 °C to +45 °C, storage down to -40 °C. Mechanical life 10 000 cycles typical.","metaTitle":"Siemens 5SM3645-0 SENTRON RCCB, 125 A, 300 mA, 4-Pole","metaDescription":"Siemens 5SM3645-0 SENTRON RCCB, 4-pole, type AC, 125 A rated current, 300 mA sensitivity, 400 V AC, 10 kA SCCR. Active production. Quoted to order.","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","Product Designation":"RCCB","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","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"top or bottom","according to EN 60898 rated value":"1.25 kA","according to IEC 61008-1 rated value":"1.25 kA","Switching Function Short-Term Delayed":"No","Value Range Of The Operating Frequency":"50 Hz","value range of the supply voltage at AC":"400 V","Ambient Temperature During Storage Minimum":"-40 °C","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"195 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","for rated value of the current at AC in hot operating state per pole":"8.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$381.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=449175&mlfb=5SM3645-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3645-0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3645-0 and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is 5SM3645-0's listed depth (77 mm) on this component line?","answer":"The depth is 77 mm, with an installation depth of 70 mm. Width is 72 mm (4 modular units), height 90 mm."},{"question":"What compliance documentation does this brand provide for 5SM3645-0 (RoHS, REACH, UL, IEC)?","answer":"The device is rated per EN 60898 and IEC 61008-1. Overvoltage category III. Silicon-free construction is confirmed. For specific RoHS/REACH declarations and UL listing status, request the manufacturer's compliance documentation with your RFQ — these are typically provided on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3645-0","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/5SM3645-0 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}}