{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TLP291(V4GBTP,SE","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TLP291V4GBTPSE","canonicalUrl":"https://icboms.com/toshiba/TLP291V4GBTPSE","factsUrl":"https://icboms.com/api/mcp/products/TLP291(V4GBTP%2CSE","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba Semiconductor TLP291(V4GBTP,SE, single-channel transistor-output optocoupler, 3750Vrms isolation, 4-SOIC surface-mount package, DC input, CTR 100% to 600% at 5 mA, -55°C to 110°C operating range.","salesMarkdown":"## 3750Vrms isolation in a 4-SOIC footprint The TLP291(V4GBTP,SE is a single-channel transistor-output optocoupler from Toshiba, housed in a 4-SOIC (0.179\", 4.55 mm width) package. It provides 3750Vrms galvanic isolation between a DC input LED and a phototransistor output, making it suitable for signal isolation in industrial I/O modules, PLC digital inputs, and motor-drive feedback circuits. The 4-SOIC package occupies roughly half the board area of a traditional DIP-4 optocoupler, which matters when you are packing eight isolated channels into a 50 mm-wide terminal block interface. ## CTR spread and switching speed Current transfer ratio spans 100% minimum to 600% maximum at a forward current of 5 mA. That 6:1 spread means the designer must size the output pull-up resistor for the worst-case minimum CTR to guarantee the output saturates at the required load current — a 100% CTR at 5 mA If delivers 5 mA at the collector, which is enough to drive a 1 kΩ pull-up to 5 V but marginal for a 10 kΩ pull-up at 3.3 V. Typical rise and fall times are 2 µs and 3 µs respectively, with turn-on and turn-off times both 3 µs. This limits the usable switching frequency to roughly 50–100 kHz for clean pulse transmission — adequate for 10 kHz PWM feedback or 1 MHz serial isolation if you accept some pulse-width distortion. ## Active production, RoHS, and sourcing posture It is RoHS-compliant per the current declaration. For BOM planning, the active status means you can commit the line without a last-time-buy risk.","metaTitle":"TLP291(V4GBTP,SE – Toshiba Optocoupler, 3750Vrms, 4-SOIC","metaDescription":"Toshiba TLP291(V4GBTP,SE transistor-output optocoupler: 3750Vrms isolation, CTR 100-600% at 5mA, -55°C to 110°C, 4-SOIC. Active production, 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)":"600% @ 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(V4GBTP,SE?","answer":"CTR is specified at 100% minimum and 600% maximum, both measured at a forward current of 5 mA. This wide range is typical for transistor-output couplers and must be accounted for in the output pull-up design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TLP291V4GBTPSE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TLP291V4GBTPSE 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}}