{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM1612-0FD","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM1612-0FD","canonicalUrl":"https://aoctrl.com/siemens/5SM1612-0FD","factsUrl":"https://aoctrl.com/api/mcp/products/5SM1612-0FD","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SM1612-0FD FI-Protector Type AC, 25A, 2-pole, 0.3A IΔn, 230V, 2TE width.","salesMarkdown":"The Siemens 5SM1612-0FD is a 2-pole FI-Protector (residual current device) rated 25 A, Type AC, with a rated residual current IΔn of 0.3 A at 230 V. It occupies 2 TE (module spaces) on a DIN rail, 55 mm deep. For circuits with rectifiers, VFDs, or switched-mode supplies, a Type A or Type B device would be required. The 0.3 A (300 mA) IΔn is a fire-protection threshold, not a personnel-protection level (which typically requires 30 mA or lower). This unit is sized for branch-circuit or feeder protection where the goal is to prevent cable overheating and fire, not direct shock protection. At 25 A rated current and 2-pole (230 V), it fits standard single-phase or split-phase sub-distribution boards. The 2 TE width leaves room for adjacent breakers. ## Deployment context Snap-on DIN-rail mounting for 35 mm rail per EN 60715. The 55 mm depth fits standard distribution enclosures without protruding into wiring ducts.","metaTitle":"Siemens 5SM1612-0FD FI-Protector, Type AC, 25A 2P 0.3A 230V","metaDescription":"Siemens 5SM1612-0FD FI-Protector Type AC, 25A, 2-pole, 0.3A IΔn, 230V, 2TE. Active 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":{"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=349672&mlfb=5SM1612-0FD","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM1612-0FD/alternatives.json"},"ai":{"faq":[{"question":"What does Type AC mean on this FI-Protector?","answer":"Type AC means it detects sinusoidal AC residual currents only. It is not suitable for circuits with rectifiers, VFDs, or other loads that produce pulsating DC fault currents — those require Type A or Type B devices."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM1612-0FD","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/5SM1612-0FD 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}}