{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SE3902-4CB20","brand":"Siemens","brandSlug":"siemens","productSlug":"3SE3902-4CB20","canonicalUrl":"https://aoctrl.com/siemens/3SE3902-4CB20","factsUrl":"https://aoctrl.com/api/mcp/products/3SE3902-4CB20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS momentary-contact foot switch, 3SE3902-4CB20, IP65, 1 pedal, 1 change-over contact, 5 A AC-15 at 230 V, screw fixing, 3 m cable.","salesMarkdown":"The Siemens SIRIUS 3SE3902-4CB20 is a momentary-contact foot switch in a molded-plastic enclosure rated IP65, with one pedal and a single change-over contact. It carries a 5 A AC-15 rating at 230 V, so it handles typical control-circuit loads like contactor coils and pilot lights without derating at that voltage. The AC-15 rating of 5 A at 230 V is the key selection number — it tells you the switch can make and break inductive control-circuit loads (solenoids, contactors) at that current. The IP65 enclosure means it's dust-tight and protected against water jets, so it's suited for washdown areas or outdoor panels. Operating temperature spans -10 to +75 °C, covering most factory-floor environments. The 3 m cable entry is fixed — no terminal block inside, so you land the cable directly. Screw fixing to the floor or panel is the intended mount; no DIN-rail clip. ## Dimensions & Mechanical Footprint is 71 mm wide by 96 mm tall, with a depth of 27 mm. No latching or interlock — it's a momentary pedal, press to make, release to break. Plastic enclosure with total insulation, so no additional grounding of the housing is required.","metaTitle":"Siemens 3SE3902-4CB20 Foot Switch, IP65, 5 A AC-15, Active","metaDescription":"Siemens SIRIUS 3SE3902-4CB20 momentary-contact foot switch, IP65, rated 5 A AC-15 at 230 V. Active production. Order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Pushbutton Switches"],"specifications":{"Depth":"27 mm","Width":"71 mm","title":"3SE3902-4CB20","Height":"96 mm","Latching":"No","Interlock":"No","description":"Foot switch molded-plastic enclosure Pedal switch 1-pedal without cover, 1 change-over contact","lifecycle_stage":"current","Cable Entry Type":"cable, 3 m","Fastening Method":"screw fixing","Of The Enclosure":"black","Product Brand Name":"SIRIUS","Product Designation":"momentary-contact foot switch","protection class IP":"IP65","Material Of The Enclosure":"plastic with total insulation","Number Of Switching Steps":"1","Of The Enclosure Top Part":"black","Substance Prohibitance (Date)":"07/01/2006","Number Of The Actuation Pedals":"1","Suitability For Use Safety Switch":"No","Ambient Temperature During Operation":"-10 ... +75 °C","reference code according to IEC 81346-2":"S","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","operational current at AC-15 at 230 V rated value":"5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$40.64","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/18efa87493b3fb0b50be16887bc8903d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=77390&mlfb=3SE3902-4CB20"},"ai":{"faq":[{"question":"What is the IP rating?","answer":"IP65 — dust-tight and protected against water jets."},{"question":"Does it have a latching function?","answer":"No, it is a momentary-contact switch with no latching or interlock."},{"question":"How is it mounted?","answer":"Screw fixing to a flat surface. The cable entry is a fixed 3 m cable, not a terminal block."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SE3902-4CB20","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/3SE3902-4CB20 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}}