{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA1902-1B","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA1902-1B","canonicalUrl":"https://aoctrl.com/siemens/3RA1902-1B","factsUrl":"https://aoctrl.com/api/mcp/products/3RA1902-1B","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA1902-1B, side module for standard mounting rail adapter, plastic, 9 x 10 x 97 mm, for contactor sizes S00, S0, S2, S3.","salesMarkdown":"## What this part does on the rail The Siemens 3RA1902-1B is a plastic side module that clips onto a standard DIN rail adapter to widen it, accommodating larger contactors or circuit breakers in the same footprint. It's designed for the SIRIUS family and fits sizes S00, S0, S2, and S3 — meaning one adapter rail can carry a mixed-size lineup without redrilling the panel. ## Dimensions that matter in the enclosure At 9 mm deep, 10 mm wide, and 97 mm tall, this module adds negligible depth to the adapter rail. The plastic body carries no electrical load; it's purely a mechanical spacer. No derating applies, and no wiring passes through it. ## Lifecycle and sourcing status Because it's a passive mechanical part with a long lifecycle horizon, it's a safe line-item for BOMs that need to stay stable across multiple panel builds.","metaTitle":"Siemens 3RA1902-1B SIRIUS DIN Rail Adapter Side Module","metaDescription":"Siemens 3RA1902-1B SIRIUS side module for widening DIN rail adapters. Compatible with S00-S3 contactors & breakers. Active production. Dimensions 9x10x97 mm.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"9 mm","Width":"10 mm","Height":"97 mm","Material":"plastic","lifecycle_stage":"current","Size Of Contactor":"S00, S0, S2, S3","Product Brand Name":"SIRIUS","Product Designation":"DIN rail adapter","Design Of The Product":"Side module to widen DIN rail adapters","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Substance Prohibitance (Date)":"07/01/2006"}},"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=296747&mlfb=3RA1902-1B","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA1902-1B/alternatives.json"},"ai":{"faq":[{"question":"What contactors and circuit breakers is 3RA1902-1B compatible with?","answer":"It fits SIRIUS contactors and circuit breakers in sizes S00, S0, S2, and S3. The side module widens the DIN rail adapter so a larger device can sit next to a smaller one on the same rail without changing the adapter."},{"question":"Where to buy Siemens 3RA1902-1B available via RFQ confirmation?","answer":"This part is sourced to order. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA1902-1B","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/3RA1902-1B 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}}