{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TLP291(GR,SE","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TLP291~1GR~6SE","canonicalUrl":"https://icboms.com/toshiba/TLP291~1GR~6SE","factsUrl":"https://icboms.com/api/mcp/products/TLP291(GR%2CSE","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba TLP291(GR,SE single-channel DC-input transistor-output photocoupler, 3750Vrms isolation, 150-300% CTR at 5mA, 80V output max, 50mA output, 4-SOIC surface-mount package, Tube, -55°C to 110°C, ROHS3 compliant, Active.","salesMarkdown":"The Toshiba TLP291(GR,SE is a single-channel photocoupler with a DC-input LED driving a phototransistor output, in a 4-SOIC surface-mount package. The 3750Vrms isolation rating is the headline spec. ## CTR range and what it tells you about drive margin Current Transfer Ratio is the photocoupler's gain. The TLP291(GR,SE specifies a CTR of 150% minimum and 300% maximum at an LED current of 5mA. ## Output ratings — 80V and 50mA The output transistor is rated for 80V collector-emitter maximum and 50mA continuous current per channel. The 80V ceiling covers 48V industrial buses with margin. The -55°C low end is unusual for a commercial optocoupler — most stop at -40°C — which makes this part suitable for cold-environment applications like arctic instrumentation or avionics bay equipment that sees -55°C during cold-soak. The 110°C upper limit is below the 125°C that automotive-grade parts carry, so it's not rated for direct under-hood mounting on an engine block, but it handles the interior of a sealed industrial enclosure on a hot factory floor. The ROHS3 compliance is current, with no lead in the solder terminations.","metaTitle":"Toshiba TLP291(GR,SE Photocoupler, 3750Vrms, 4-SOIC, Tube","metaDescription":"Toshiba TLP291(GR,SE single-channel DC-input transistor-output photocoupler. 3750Vrms isolation, 150-300% CTR at 5mA, -55°C to 110°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"4-SOIC (0.179\\\", 4.55mm Width)","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"3750Vrms","Vce Saturation (Max)":"300mV","Operating Temperature":"-55°C ~ 110°C","Rise / Fall Time (Typ)":"2µs, 3µs","Voltage - Output (Max)":"80V","Supplier Device Package":"4-SO","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"300% @ 5mA","Current Transfer Ratio (Min)":"150% @ 5mA","Voltage - Forward (Vf) (Typ)":"1.25V","Turn On / Turn Off Time (Typ)":"3µs, 3µs","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.59","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.59000","currency":"USD"},{"qty":10,"price":"$0.36400","currency":"USD"},{"qty":100,"price":"$0.20910","currency":"USD"},{"qty":1000,"price":"$0.16362","currency":"USD"},{"qty":2000,"price":"$0.14999","currency":"USD"},{"qty":5000,"price":"$0.13635","currency":"USD"},{"qty":10000,"price":"$0.12726","currency":"USD"},{"qty":25000,"price":"$0.12272","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a8ee6f0a66b20e745d1c9a7a3ea4ce22.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is a direct replacement for the TLP291(GR,SE?","answer":"The TLP291(GB,SE is the closest functional alternative — same package, same 3750Vrms isolation, same output ratings, but with a lower CTR bin of 100-200% minimum at 5mA. Swap it in only if your design does not require the 150% CTR floor of the GR bin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TLP291~1GR~6SE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TLP291~1GR~6SE when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}