{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SE2903-1AB20","brand":"Siemens","brandSlug":"siemens","productSlug":"3SE2903-1AB20","canonicalUrl":"https://aoctrl.com/siemens/3SE2903-1AB20","factsUrl":"https://aoctrl.com/api/mcp/products/3SE2903-1AB20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3SE2903-1AB20 momentary-contact foot switch, 1-pedal, metal enclosure, IP65, 2 NO + 2 NC contacts, M20 x 1.5 cable entry, 6 A at 230 V / 400 V.","salesMarkdown":"## What this foot switch is and where it lands The Siemens 3SE2903-1AB20 is a SIRIUS-series momentary-contact foot switch — a single-pedal unit with a metal enclosure rated IP65, meaning it stands up to washdown and dust ingress on a factory floor. It provides 2 normally-open and 2 normally-closed auxiliary contacts, giving four switching paths from one pedal press. The enclosure is metal (black body, grey top part) and accepts a single M20 x 1.5 cable gland, so you run a single cable into the switch body rather than multiple entries. Ambient operating range is -25 to +80 °C, which covers most indoor industrial environments without derating. ## Rated currents and what they mean for the circuit The contact block is rated 6 A at 230 V AC and also 6 A at 400 V AC — the same current rating across both voltage levels, which is typical for a general-purpose auxiliary contact block switching resistive or light inductive loads. At 24 V DC the rating drops to 3 A, and at 250 V DC it falls to 0.25 A, reflecting the DC arc-quenching limits of the contact gap. ## Lifecycle and sourcing posture The product carries a substance prohibitance date of 07/01/2006, which aligns with the EU RoHS compliance timeline. No UL, CSA, or other agency marks are listed in the spec record, so verify local code acceptance if the installation requires third-party certification.","metaTitle":"Siemens 3SE2903-1AB20 Foot Switch, 2NO+2NC, IP65, 6A","metaDescription":"Siemens 3SE2903-1AB20 SIRIUS momentary-contact foot switch. Metal IP65 enclosure, 2NO+2NC contacts, M20 cable entry. Rated 6A at 230V/400V.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Limit Switches"],"specifications":{"Depth":"220 mm","Width":"70 mm","title":"3SE2903-1AB20","Height":"70 mm","Latching":"No","Interlock":"No","description":"Momentary-contact foot switch, 1-pedal without cover, without latching Metal enclosure IP65, 2 NO+2 NC, Cable entry M20 x 1.5","lifecycle_stage":"current","Cable Entry Type":"M20 x 1.5","Of The Enclosure":"black","Product Brand Name":"SIRIUS","Product Designation":"momentary-contact foot switch","at 24 V rated value":"3 A","protection class IP":"IP65","at 230 V rated value":"6 A","at 250 V rated value":"0.25 A","at 400 V rated value":"6 A","Material Of The Enclosure":"metal","Number Of Switching Steps":"1","Of The Enclosure Top Part":"grey","Substance Prohibitance (Date)":"07/01/2006","Number Of The Actuation Pedals":"1","Suitability For Use Safety Switch":"No","Ambient Temperature During Operation":"-25 ... +80 °C","reference code according to IEC 81346-2":"S","with low demand rate according to SN 31920":"50 %","with high demand rate according to SN 31920":"50 %","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","Minimum Actuating Force In Directions Of Actuation":"20 N"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$64.77","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fd269a5a47a292e076b45fcf18589e9e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=320367&mlfb=3SE2903-1AB20"},"ai":{"faq":[{"question":"What are the contact ratings for the 3SE2903-1AB20?","answer":"The auxiliary contacts are rated 6 A at 230 V AC, 6 A at 400 V AC, 3 A at 24 V DC, and 0.25 A at 250 V DC. The switch provides 2 normally-open and 2 normally-closed contacts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SE2903-1AB20","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/3SE2903-1AB20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}