{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3FB-DN21","brand":"Omron","brandSlug":"omron","productSlug":"E3FB-DN21","canonicalUrl":"https://aoctrl.com/omron/E3FB-DN21","factsUrl":"https://aoctrl.com/api/mcp/products/E3FB-DN21","rawCanonicalId":null},"summary":{"shortDescription":"Omron E3FB Series Photoelectric Sensor, Diffuse, NPN, 4-Pin M12, 10-30V DC, 100 mm Sensing Distance, IP67/IP69K, CE.","salesMarkdown":"## What’s in the lot – E3FB-DN21 Omron E3FB-DN21: an M18-threaded brass diffuse photoelectric sensor, NPN output, 4-pin M12 connector. Runs on 10-30V DC, switches up to 100 mA, detects opaque objects down to 7 mm at up to 100 mm. Response time 0.5 ms, selectable light-on/dark-on. IP67/IP69K rated – tough enough for washdown zones. Built-in output reverse polarity, short circuit, and supply reverse polarity protection. That means fewer dead sensors on the line – value’s in the sort. ## Sibling play: E3FB-DN21 vs E3FB-DN23 E3FB-DN23 is the same sensor with one big difference: sensing distance jumps to 1 m instead of 100 mm. Same M18 brass body, same NPN output, same M12 connector, same IP rating. If your lot needs longer range, grab the DN23 and drop it in the same hole – wiring and mounting identical.","metaTitle":"Omron E3FB-DN21 Photoelectric Sensor, NPN, Diffuse, 100 mm,","metaDescription":"Omron E3FB-DN21 M18 diffuse photoelectric sensor, NPN, 4-pin M12, 10-30V DC, 100 mm range, IP67/IP69K, CE. Active production – source to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"title":"E3FB-DN21","Series":"E3FB","Features":"Output Reverse Polarity Protection; Output Short Circuit Protection; Power Supply Reverse Polarity Protection","IP Rating":"IP67; IP69K","Standards":"CE","Display Qty":"1","description":"OMRON Photoelectric Sensor: M18 Threaded, Built-in Connector, 4 - Pin M12, 10-30V DC, NPN, DC-Only","Product Type":"Photoelectric Sensor","Body Material":"Brass","Response Time":"0.5 msec","Number of Pins":"4","Output Circuit":"NPN","Overall Height":"48 mm","Sensing Method":"Diffuse","Supply Voltage":"10-30V DC","Sensor Diameter":"18 mm","lifecycle_stage":"current","Display Sell UOM":"EA","Overall Diameter":"18 mm","Sensor Body Style":"Cylindrical","Minimum Object Size":"7mm Dia. Opaque","Output Circuit Type":"NPN","Supply Voltage Type":"DC-Only","Emitted Sensor Light":"Red Light","Electrical Connection":"M12","Sensor Switching Mode":"Selectable Light On/Dark On","Load Current - Maximum":"100 mA","Sensor Face Orientation":"Right Angle","DC Supply Voltage Rating":"10-30V DC","Includes Indicator Lights":"Indicator Lights Included","Sensing Distance - Maximum":"100 mm","Electrical Installation Type":"Direct Connector","Operating Temperature - Maximum":"131 °F","Operating Temperature - Minimum":"-13 °F"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$32.51","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c74094fdf416913ab404d550de9765ff.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What's the closest functional second-source – E3FB-DN23?","answer":"E3FB-DN23 is a direct sibling with a longer sensing distance (1 m vs 100 mm). Same M18 brass housing, NPN output, M12 connector, IP67/IP69K. Physically interchangeable."},{"question":"Will E3FB-DN21 drop into a panel wired for E3FB-DN23 without rewiring?","answer":"Yes – both use the same 4-pin M12 connector, same NPN output wiring (load to +V, output to sinking input). No rewiring needed."},{"question":"What compliance documentation does this part have?","answer":"CE marking is confirmed. RoHS, REACH, and UL are not listed in the available specs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3FB-DN21","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/omron/E3FB-DN21 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}}