{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3612-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3612-0","canonicalUrl":"https://aoctrl.com/siemens/5SM3612-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3612-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series, 5SM3612-0, 2-pole RCCB, 25 A rated, 300 mA AC type, 230 V, 10 kA, DIN rail.","salesMarkdown":"The 5SM3612-0: The 300 mA residual-current sensitivity makes it suitable for general fault protection (not personal shock protection, which needs 30 mA) — it catches insulation faults and equipment leakage in circuits feeding motors, heaters, or distribution sub-panels where nuisance tripping at 30 mA would be a problem. If the downstream load includes VFDs, rectifiers, or switched-mode supplies that can generate DC fault components, an A-type or B-type RCCB would be the correct choice. ## Thermal derating and enclosure reality The 5SM3612-0 carries its full 25 A up to 45 °C ambient inside the distribution board. At 50 °C it derates to 24 A, at 60 °C to 22 A, and at 70 °C to 20 A. In a cement plant control room or a hot MCC, that derating curve is what governs the real circuit load, not the nameplate 25 A. Storage and transport range is -40 to +75 °C, so the part survives the ride through unheated warehouses and truck beds. Operating ambient for the enclosure is -5 to +45 °C; the derating table above covers the higher end. The 70 mm depth (installation depth 70 mm) fits standard distribution boards and sub-distribution panels. ## Wiring and conductor range ## Protection class and approvals context Not rated for wet or dusty environments without an outer enclosure. Finger and back-of-hand safe touch protection is built into the terminal design.","metaTitle":"Siemens 5SM3612-0 SENTRON RCCB, 25A 2P 300mA AC Type, 10kA","metaDescription":"Siemens 5SM3612-0 SENTRON 2-pole RCCB, 25A rated, 300mA AC type, 10kA SCCR, 230V, DIN rail. Current production. Quoted 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":"70 mm","Solid":"1 ... 16 mm²","Width":"36 mm","Height":"90 mm","Stranded":"1 ... 16 mm²","at 40 Cel":"25 A","at 45 Cel":"25 A","at 50 Cel":"24 A","at 55 Cel":"23 A","at 60 Cel":"22 A","at 65 Cel":"21 A","at 70 Cel":"20 A","Rated Value":"50 Hz","Wertebereich":"-5 ... +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":"Instantaneous","Number of width units":"2","Type of fault current":"AC","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","I2t-value / permissible":"70 000 A²·s","circuit-breaker / Design":"5SM3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"25 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","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":"$157.52","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=433835&mlfb=5SM3612-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3612-0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to the 5SM3612-0?","answer":"The closest functional peer in the SENTRON family is the 5SL6550-7BB, but it is a different design series (5SL6 vs 5SM3) with different breaking characteristics. The 5SM3612-0 is an instantaneous RCCB (no short-time delay), while the 5SL6 series includes selective (S-type) variants. Verify the trip characteristic and time-delay requirement before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3612-0","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/5SM3612-0 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}}