{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TLP385(D4-GB,E","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TLP385D4-GBE","canonicalUrl":"https://icboms.com/toshiba/TLP385D4-GBE","factsUrl":"https://icboms.com/api/mcp/products/TLP385(D4-GB%2CE","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba Semiconductor TLP385(D4-GB,E, 1-channel DC-input transistor-output optocoupler, 5000Vrms isolation, CTR 100%–600% at 5mA, -55°C to 110°C, 6-SOIC 4-lead surface-mount package, Tube.","salesMarkdown":"The TLP385(D4-GB,E delivers 5000Vrms isolation in a 4-lead SOIC footprint — enough for reinforced insulation in mains-referenced PSU feedback loops and PLC digital input modules. The CTR floor of 100% at 5mA forward current (max 600%) means the LED drive can be set conservatively without losing output saturation at 80V/50mA, even over the full -55°C to 110°C range. ## Switching speed and saturation — timing margin for digital isolation Typical turn-on/turn-off times are 3µs each, with rise/fall of 2µs/3µs. That puts the usable switching frequency around 100 kHz for logic-level signals — adequate for 24V PLC input debounce, relay coil drive, and isolated I²C bit-banging. The 300mV max Vce(sat) at 50mA output keeps the low-side voltage drop inside a logic-high threshold for 3.3V or 5V domains. ## Package and mounting — 4-lead SOIC vs 6-lead trade-off The two unused centre pins (2,3) are omitted, which increases creepage distance between input and output for the 5000Vrms rating. Surface-mount assembly with standard SOIC-6 solder paste stencil; no exposed pad to worry about. ## Lifecycle and supply posture RoHS compliant. Sourced per RFQ against your BOM quantity; no stock-holding claim on this page.","metaTitle":"TLP385(D4-GB,E Toshiba Optoisolator 5000Vrms 4-SOIC Active","metaDescription":"TLP385(D4-GB,E Toshiba transistor-output optocoupler, 1-channel DC input, 5000Vrms isolation, CTR 100-600% at 5mA, -55 to 110°C, 4-lead SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","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)":"300mV","Operating Temperature":"-55°C ~ 110°C","Rise / Fall Time (Typ)":"2µs, 3µs","Voltage - Output (Max)":"80V","Supplier Device Package":"6-SO, 4 Lead","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":"$0.54","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.54000","currency":"USD"},{"qty":10,"price":"$0.35500","currency":"USD"},{"qty":100,"price":"$0.23450","currency":"USD"},{"qty":1000,"price":"$0.18107","currency":"USD"},{"qty":2000,"price":"$0.16362","currency":"USD"},{"qty":5000,"price":"$0.15271","currency":"USD"},{"qty":10000,"price":"$0.14726","currency":"USD"},{"qty":25000,"price":"$0.14508","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/331d269fb9551bcaaac5f6b0e0ad3456.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the CTR of TLP385(D4-GB,E?","answer":"Current transfer ratio is 100% minimum, 600% maximum, both specified at IF=5mA. That wide range gives flexibility in LED drive current — a 1mA forward current still guarantees at least 20% CTR, enough to saturate the output transistor at low collector current."},{"question":"Can TLP385(D4-GB,E replace TLP185?","answer":"Not directly — the TLP185 is a 4-pin SSOP with lower isolation (3750Vrms) and a different CTR bin. The TLP385(D4-GB,E has 5000Vrms and a wider CTR range, so it can work as a functional upgrade if the footprint (SOIC-4 vs SSOP-4) and creepage requirements align. Verify the pad layout — the TLP385 uses a 6-SOIC body with 4 leads, so the PCB land pattern is different from the TLP185's 4-pin SSOP."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TLP385D4-GBE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TLP385D4-GBE 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}}