{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TLP291(GR-TP,SE","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TLP291GR-TPSE","canonicalUrl":"https://icboms.com/toshiba/TLP291GR-TPSE","factsUrl":"https://icboms.com/api/mcp/products/TLP291(GR-TP%2CSE","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba Semiconductor TLP291(GR-TP,SE, single-channel DC-input transistor-output optoisolator, 3750Vrms isolation, 4-SOIC surface-mount package, 100% to 300% CTR at 5 mA.","salesMarkdown":"## 3750Vrms isolation in a 4-SOIC package The TLP291(GR-TP,SE is a single-channel optoisolator from Toshiba that couples a DC-input LED to a phototransistor output across a 3750Vrms galvanic barrier. That isolation rating suits it for basic functional isolation in industrial control interfaces, PLC digital inputs, and general-purpose signal isolation where you need to break ground loops or protect low-voltage logic from a higher-voltage field side. The output transistor can handle up to 80V collector-emitter and 50 mA continuous current, with a typical Vce(sat) of 300 mV at the rated forward current — low enough to drive a logic gate input or a small relay coil without an extra buffer stage. ## CTR bin GR — 100% to 300% at 5 mA forward The GR suffix bins the current transfer ratio between 100% and 300% at If=5 mA. That means with 5 mA through the LED, the output transistor can sink at least 5 mA (100% CTR) and up to 15 mA (300% CTR) — a wide margin that lets you design the input drive for a fixed 5 mA and still guarantee the output saturates even at the low end of the bin. The typical rise and fall times are 2 µs and 3 µs respectively, with turn-on and turn-off both at 3 µs, so this part is comfortable switching signals up to a few tens of kilohertz.","metaTitle":"TLP291(GR-TP,SE Optoisolator 3750Vrms Transistor Output","metaDescription":"Toshiba TLP291(GR-TP,SE optoisolator: 3750Vrms isolation, transistor output, DC input, 100-300% CTR at 5mA, 4-SOIC, Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","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)":"100% @ 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":2500,"price":"$0.14998","currency":"USD"},{"qty":5000,"price":"$0.13635","currency":"USD"},{"qty":12500,"price":"$0.12726","currency":"USD"},{"qty":25000,"price":"$0.12272","currency":"USD"},{"qty":62500,"price":"$0.11817","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a8ee6f0a66b20e745d1c9a7a3ea4ce22.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) of TLP291(GR-TP,SE)?","answer":"The GR bin specifies a CTR range of 100% to 300% at If=5 mA. This means the output collector current will be between 1× and 3× the LED forward current at that drive level."},{"question":"Is TLP291(GR-TP,SE) RoHS compliant?","answer":"Yes, it is listed as ROHS3 compliant."},{"question":"When sourcing TLP291(GR-TP,SE, what is the closest functional second-source?","answer":"The TLP291(GRL-TP,SE is a direct sibling with the same package, isolation, and output ratings — the L suffix typically indicates a tighter CTR bin or a different test condition. Confirm the CTR range on the specific sibling datasheet before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TLP291GR-TPSE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TLP291GR-TPSE when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}