{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3614-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3614-8","canonicalUrl":"https://aoctrl.com/siemens/5SM3614-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3614-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3614-8, 2-pole RCCB, Type A selective, 40 A rated current, 300 mA residual trip, 230 V AC, DIN rail mount.","salesMarkdown":"The Siemens SENTRON 5SM3614-8 is a 2-pole residual current operated circuit breaker (RCCB), Type A selective, rated 40 A at 230 V AC with a 300 mA residual trip threshold. Selective (short-time delayed) design means it coordinates with downstream RCCBs — in a fault, the downstream device trips first, keeping this one closed to avoid blacking out the whole submain. The 300 mA residual trip threshold is the key selection parameter — this is not a personnel-protection device (those are 30 mA). It's sized for equipment protection and fire prevention on sub-distribution boards where nuisance tripping from leakage currents in long cable runs or multiple loads would be unacceptable. The 40 A continuous rating matches a typical sub-feed or feeder circuit; the 5 kA surge current withstand means it survives line transients without welding contacts. The 10 000 mechanical switching cycles is standard for a panel RCCB — not a daily-switch duty, but fine for infrequent manual test and isolation. Terminals accept 1 to 16 mm² solid or stranded copper, torqued to 2.5–3 N·m. That covers the full range from a 1.5 mm² control circuit to a 16 mm² feeder. The 70 mm installation depth and 36 mm width (2 modular units) are standard for a 2-pole SENTRON RCCB — it occupies the same DIN-rail footprint as a 2-pole MCB, so panel layout swaps are straightforward. Snaps onto DIN rail, any mounting position. Ambient operating range -25 to +45 °C; storage range -40 to +75 °C. Overvoltage category III confirms it's rated for fixed-installation distribution panels, not for downstream equipment-level protection.","metaTitle":"Siemens 5SM3614-8 SENTRON RCCB, 40A 300mA Type A Selective","metaDescription":"Siemens 5SM3614-8 SENTRON RCCB, 2-pole, Type A selective, 40A, 300mA, 230V AC. Active production. Sourced to order. Get a quote.","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 ... 16 mm²","Width":"36 mm","Height":"90 mm","Stranded":"1 ... 16 mm²","Rated Value":"50 Hz","Wertebereich":"-25 ... +45 °C","Mounting type":"DIN rail (REG)","Number of poles":"2","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +75 °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","Type of fault current":"A","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SM3","Current / at AC / rated value":"40 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=146421&mlfb=5SM3614-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3614-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3614-8 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 quote."},{"question":"What is 5SM3614-8's listed depth?","answer":"70 mm installation depth, which is standard for a 2-pole SENTRON RCCB and matches the depth of most 2-pole MCBs in the same series."},{"question":"What conductor sizes does 5SM3614-8 accept?","answer":"Solid and stranded copper from 1 to 16 mm². Terminal torque spec is 2.5 to 3 N·m."},{"question":"Will 5SM3614-8 drop into a panel specified around 5SL6550-7BB without rewiring?","answer":"No — the 5SL6550-7BB is a miniature circuit breaker (MCB), not an RCCB. The 5SM3614-8 is a 2-pole RCCB with the same 36 mm width and 70 mm depth, so it occupies the same DIN-rail footprint, but the function and wiring are different. An MCB cannot be swapped for an RCCB without rewiring the circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3614-8","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/5SM3614-8 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}}