{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TLP291(GRL-TP,SE","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TLP291GRL-TPSE","canonicalUrl":"https://icboms.com/toshiba/TLP291GRL-TPSE","factsUrl":"https://icboms.com/api/mcp/products/TLP291(GRL-TP%2CSE","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba TLP291(GRL-TP,SE DC-input transistor-output optocoupler, 3750Vrms isolation, 100-200% CTR at 5mA, 80V Vce max, 50mA output, 4-SOIC package, -55 to 110°C, surface mount.","salesMarkdown":"## 3750Vrms isolation in a 4-SOIC footprint The Toshiba TLP291(GRL-TP,SE is a single-channel DC-input transistor-output optocoupler rated for 3750Vrms isolation, packaged in a 4-SOIC (0.179\", 4.55mm width) surface-mount case. It is designed for galvanic isolation in industrial control, power supply feedback, and digital interface applications where the board space is tight but the safety rating is non-negotiable. ## CTR binning — the GRL rank at 5mA The GRL suffix selects a current transfer ratio (CTR) window of 100% to 200%, measured at 5mA forward current. That middle band gives the designer a predictable LED drive current: at 5mA input, the output transistor can sink between 5mA and 10mA (CTR × If). This matters when you are sizing the input-side resistor for a given logic-level threshold or relay coil current. The 100% minimum ensures the opto turns on reliably even with a weak LED drive; the 200% cap prevents saturation delay from getting too long in high-speed switching. ## 80V output and 50mA per channel The output transistor is rated for 80V collector-emitter voltage and 50mA continuous output current. That voltage headroom covers 24V and 48V industrial buses with margin; the 50mA limit is typical for driving a logic gate input, a small relay, or a PLC input module. Vce saturation is 300mV max at the rated current, so the voltage drop across the opto is low enough to keep the downstream logic threshold clean. ## Switching speed and timing budget Rise and fall times are 2µs and 3µs typical; turn-on and turn-off times are both 3µs typical. That puts the usable switching frequency around 100 kHz or lower for clean pulse transmission. If you need faster edges for a high-speed serial isolator, this is not the part — but for 50/60 Hz mains zero-cross detection, relay drive, or slow digital isolation, the timing is more than adequate. ## Temperature range and environment The 110°C ceiling is below automotive under-hood requirements (typically 125°C or 150°C), but it covers the vast majority of factory automation and power-supply applications.","metaTitle":"TLP291(GRL-TP,SE Optoisolator, 3750Vrms, 100-200% CTR","metaDescription":"TLP291(GRL-TP,SE DC-input transistor output optocoupler, 3750Vrms isolation, 100-200% CTR at 5mA, 80V Vce max, -55 to 110°C. Active, RoHS.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS 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)":"200% @ 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(GRL-TP,SE) at 5mA?","answer":"The CTR is 100% minimum and 200% maximum at 5mA forward current, per the GRL binning suffix."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TLP291GRL-TPSE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TLP291GRL-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}}