{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3617-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3617-8","canonicalUrl":"https://aoctrl.com/siemens/5SM3617-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3617-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series, RCCB, 2-pole, Type A selective, 80 A, 300 mA, 230 V AC, 10 kA SCCR, DIN rail mount.","salesMarkdown":"The Siemens 5SM3617-8 is a 2-pole residual current circuit breaker (RCCB) from the SENTRON 5SM3 series, rated 80 A at 230 V AC with a 300 mA residual trip threshold. It's a Type A selective design — meaning it's built to discriminate from downstream RCCBs, so only the faulted branch trips and the rest of the distribution board stays live. That selectivity is the whole point: you don't want a ground fault on a lighting circuit taking out the whole panel. The 300 mA trip threshold is sized for equipment protection or circuits with high leakage from long cable runs or VFDs. Mounts on a DIN rail (REG), takes 2.5 width units (45 mm of rail space), and accepts conductors from 1.5 to 25 mm² solid or stranded. The 70 mm depth and 90 mm height are standard for this class of DIN-rail device. Supply can come from top or bottom, which gives flexibility in busbar routing. The 2.5 width units (45 mm) mean it occupies two and a half 18 mm module slots. Plan your rail fill accordingly — it's wider than a standard single-pole MCB but narrower than a 4-pole RCCB. The silicon-free construction is relevant for potting or conformal coating processes in sensitive environments. ## How the ratings drive the decision The 300 mA residual trip is selective: it's deliberately slower and higher than downstream 30 mA RCCBs, so a small leakage on a socket circuit trips the local device, not this one. The 5 kA surge current resistance means it can withstand transient overvoltages from switching or lightning without nuisance tripping. Type A detection means it catches both sinusoidal AC fault currents and pulsating DC fault currents — the kind you get from rectifiers, switching power supplies, or single-phase VFDs. That's the minimum type for modern commercial panels where electronics are present.","metaTitle":"Siemens 5SM3617-8 SENTRON RCCB, 80 A, 300 mA, 2-pole, Type A","metaDescription":"Siemens 5SM3617-8 SENTRON RCCB, 2-pole, Type A selective, 80 A rated, 300 mA trip, 10 kA SCCR, 230 V AC, DIN rail. 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":{"Depth":"70 mm","Solid":"1.5 ... 25 mm²","Width":"36 mm","Height":"90 mm","Stranded":"1.5 ... 25 mm²","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","During Storage":"-40 ... +75 °C","Number of poles":"2","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","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":"Selective","Number of width units":"2.5","Type of fault current":"A","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SM3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"80 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":"5 kA","Switching function / short-term delayed":"No","Tripping residual current / rated value":"300 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=24184&mlfb=5SM3617-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3617-8/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 5SM3617-8?","answer":"The depth is 70 mm, with an installation depth of 70 mm. The width is 36 mm (2.5 width units) and the height is 90 mm."},{"question":"What wire sizes does the 5SM3617-8 accept?","answer":"It accepts solid conductors from 1.5 to 25 mm² and stranded conductors from 1.5 to 25 mm². The screw terminals torque to 2.5–3 N·m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3617-8","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/5SM3617-8 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}}