{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM1312-0FD","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM1312-0FD","canonicalUrl":"https://aoctrl.com/siemens/5SM1312-0FD","factsUrl":"https://aoctrl.com/api/mcp/products/5SM1312-0FD","rawCanonicalId":null},"summary":{"shortDescription":"Siemens FI-Protector, Type AC (WS), 25A, 2-pole, 30mA, 230V, 55mm width, 2TE.","salesMarkdown":"## Type AC residual current protection, 25 A, 2-pole The Siemens 5SM1312-0FD is a Type AC FI-Protector (residual current device / RCD) rated 25 A, 2-pole, with a 30 mA trip sensitivity at 230 V. The 30 mA sensitivity covers personnel protection (shock hazard) per IEC/EN 61008; 25 A ampacity suits it for final sub-circuits feeding socket outlets, lighting, or small equipment in residential and commercial panels. ## DIN-rail mounting, 2 TE width Width is 55 mm (2 module spaces / 2 TE on a standard DIN-rail enclosure). The 2-pole form factor (L + N) occupies two positions in the distribution board. Terminal capacity and wire range follow the standard Siemens FI-Protector footprint for retrofit into existing SENTRON or other DIN-rail panels.","metaTitle":"Siemens 5SM1312-0FD FI-Protector, 25A 2-Pole 30mA Type AC, 2","metaDescription":"Siemens 5SM1312-0FD FI-Protector, 25A, 2-pole, 30mA Type AC residual current, 230V, 2TE. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"lifecycle_stage":"current"}},"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=8252&mlfb=5SM1312-0FD","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM1312-0FD/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM1312-0FD and get a price?","answer":"We source this part to order against an RFQ. Current pricing and availability are confirmed at quote time — submit an RFQ through the storefront for a firm quote."},{"question":"What is the difference between Type AC and Type A RCDs for this part?","answer":"Type AC (as on this 5SM1312-0FD) detects sinusoidal AC residual currents only. Type A also detects pulsating DC residual currents (e.g. from rectifiers, VFDs, or switching power supplies). For circuits with electronics, a Type A or Type F device is typically required; Type AC is the baseline for purely sinusoidal AC loads."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM1312-0FD","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/5SM1312-0FD 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}}