{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TLP388(TPL,E","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TLP388TPLE","canonicalUrl":"https://icboms.com/toshiba/TLP388TPLE","factsUrl":"https://icboms.com/api/mcp/products/TLP388(TPL%2CE","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba Semiconductor TLP388(TPL,E, single-channel DC-input transistor-output optocoupler, 6-SOIC 4-lead package, 5000 Vrms isolation, 350 V output max, -55°C to 125°C operating range.","salesMarkdown":"## Isolation barrier and output voltage headroom The TLP388(TPL,E delivers 5000 Vrms isolation in a 4-lead SOIC package — a reinforced-grade rating that supports safety certification for mains-referenced circuits without an external isolator. Output transistor is rated to 350 V maximum, which means it can directly switch loads on a 350 VDC rail, eliminating a secondary relay or MOSFET buffer. ## CTR spread and switching speed for design margin Current transfer ratio spans 50% to 600% at 5 mA forward current — a spread that forces the designer to bias the LED for the minimum CTR and verify saturation at the maximum. Rise and fall times are 2 µs and 3 µs typical, with matched turn-on and turn-off times of 3 µs each — adequate for low-speed logic isolation. ## Temperature grade and production status Rated for -55°C to 125°C, the TLP388(TPL,E fits avionics, downhole instrumentation, and outdoor telecom where the ambient swings beyond commercial limits.","metaTitle":"TLP388(TPL,E Optocoupler – 5000 Vrms, 350 V Output","metaDescription":"Toshiba TLP388(TPL,E transistor-output optocoupler: 5000 Vrms isolation, 350 V output, 50-600% CTR at 5 mA. Active production, ROHS3. Request RFQ.","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":"6-SOIC (0.173\\\", 4.40mm Width), 4 Leads","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-55°C ~ 125°C","Rise / Fall Time (Typ)":"2µs, 3µs","Voltage - Output (Max)":"350V","Supplier Device Package":"6-SO, 4 Lead","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"600% @ 5mA","Current Transfer Ratio (Min)":"50% @ 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":"$0.78","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.78000","currency":"USD"},{"qty":10,"price":"$0.50700","currency":"USD"},{"qty":100,"price":"$0.33200","currency":"USD"},{"qty":1000,"price":"$0.26210","currency":"USD"},{"qty":3000,"price":"$0.24462","currency":"USD"},{"qty":6000,"price":"$0.23589","currency":"USD"},{"qty":15000,"price":"$0.23239","currency":"USD"},{"qty":30000,"price":"$0.22715","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/312d4169544f072d9d6f6356098f22f3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) of TLP388(TPL,E)?","answer":"CTR is specified at 50% minimum and 600% maximum, both measured at IF=5 mA. The wide spread means the LED drive current must be sized for the minimum CTR to guarantee output saturation across all units."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TLP388TPLE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TLP388TPLE 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}}