{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3JM-R4S4T-US","brand":"Omron","brandSlug":"omron","productSlug":"E3JM-R4S4T-US","canonicalUrl":"https://aoctrl.com/omron/E3JM-R4S4T-US","factsUrl":"https://aoctrl.com/api/mcp/products/E3JM-R4S4T-US","rawCanonicalId":null},"summary":{"shortDescription":"Omron E3JM Series, Retro-reflective Photoelectric Sensor, E3JM-R4S4T-US, 24-240 VAC and 12-240 VDC, NPN/DC SSR Output, 4 m Max Sensing Distance, Built-in Power Supply.","salesMarkdown":"## Part overview The E3JM-R4S4T-US is a retro-reflective photoelectric sensor with a built-in power supply, meaning it handles both AC and DC lines directly — no external power module needed in the cabinet. Output is NPN / DC SSR, switching both sinking DC loads and solid-state outputs. Sensing distance tops out at 4 m with a polarized red LED light source; the L-ON / D-ON selector lets you choose light-on or dark-on operation without rewiring. Connection is via a terminal block, so no prewired pigtail. ## How it compares — the E3Z series is not a direct swap The E3Z-T61K 2M is often checked as a cross-reference, but it won't drop in. The E3Z runs on 12–24 VDC only and uses a through-beam sensing method (separate emitter and receiver), not retro-reflective. That means you'd need a different mounting setup, a different power supply, and a reflector at the target. If you need to replace the E3JM-R4S4T-US with something close in function, look for another retro-reflective sensor with a 4 m range and a built-in power supply that accepts both 24-240 VAC and 12-240 VDC — those are the specs that matter.","metaTitle":"E3JM-R4S4T-US Obsolete Retro-reflective Sensor, 4 m, Multi-v","metaDescription":"Omron E3JM-R4S4T-US retro-reflective photoelectric sensor, multi-voltage (24-240 VAC / 12-240 VDC), NPN/DC SSR output, 4 m range. Obsolete — sourced to order. Submit RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"Type":"Built-in Power Supply","title":"E3JM-R4S4T-US","Output":"NPN, DC SSR","Body Type":"Rectangular","Operation":"L-ON/D-ON selectable","Connection":"Terminal Block","description":"E3JM Multi-voltage Photoelectric Sensor|Multi-voltage photoelectric sensor in plastic housing with timer function","Light Source":"Polarized Red LED","Sensing Method":"Retro-reflective","Supply Voltage":"24-240 VAC and 12-240 VDC","lifecycle_stage":"mature","Housing Material":"Plastic","Product Life Cycle":"Obsolete","Max Sensing Distance":"4 m"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$661.42","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e9a0598be6cd4ab6df31cfd0940846c5.pdf","sourceUrl":"https://automation.omron.com/en/us/products/family/e3jm"},"ai":{"faq":[{"question":"Can I use the E3Z-T61K 2M as a direct replacement?","answer":"No. The E3Z-T61K 2M is a through-beam sensor operating on 12-24 VDC only, while the E3JM-R4S4T-US is a retro-reflective sensor with a multi-voltage supply (24-240 VAC / 12-240 VDC). They are not functionally interchangeable without significant rewiring and mounting changes."},{"question":"What is the output type of this sensor?","answer":"The output is NPN and DC SSR. NPN for sinking DC loads, and a solid-state relay (SSR) for DC switching. Both are available from the same terminal block."},{"question":"What is the sensing method and maximum range?","answer":"Retro-reflective with a polarized red LED. Maximum sensing distance is 4 m. Requires a reflector at the target."},{"question":"How do I source this part if it's obsolete?","answer":"Submit an RFQ. We source obsolete and hard-to-find automation parts through our surplus network. No guaranteed stock — quotes are based on current broker availability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3JM-R4S4T-US","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/E3JM-R4S4T-US 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}}