{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCMT4606","brand":"Vishay","brandSlug":"vishay","productSlug":"TCMT4606","canonicalUrl":"https://icboms.com/vishay/TCMT4606","factsUrl":"https://icboms.com/api/mcp/products/TCMT4606","rawCanonicalId":null},"summary":{"shortDescription":"Vishay TCMT4606 quad-channel phototransistor optocoupler, 3750Vrms isolation, 100-300% CTR at 5mA, 70V output, 50mA/ch, 16-SOIC, -40 to 100°C, active.","salesMarkdown":"## Quad phototransistor optocoupler in 16-SOIC The Vishay TCMT4606 is a 4-channel phototransistor optocoupler in a 16-SOIC package, providing 3750Vrms galvanic isolation between input and output. ## CTR range and drive margin The current transfer ratio spans 100% to 300% at a forward current of 5mA. The wide CTR spread (3:1) is typical for phototransistor couplers; design the pull-up resistor for the minimum CTR to guarantee logic-level switching across all temperature and aging conditions. Rise and fall times are 3µs and 4.7µs typical; turn-on and turn-off times are 6µs and 5µs typical. This part is not for high-speed isolation — expect usable bandwidth around 10–20 kHz. For 100 kHz+ isolated data, look at a digital isolator or high-speed optocoupler. But for 50/60 Hz mains sensing, relay drive, or slow digital signals, the TCMT4606 is perfectly adequate and avoids the cost of faster parts. ## AC/DC input flexibility The input stage accepts both AC and DC drive. With AC input, the LED conducts on both half-cycles, which is useful for zero-crossing detection or line-voltage monitoring without external rectification. For DC logic, a series resistor sets the forward current to 5–60 mA (max 60 mA absolute). Typical forward voltage is 1.35V at 5mA, compatible with 3.3V and 5V logic families. It does not reach the 125°C required for automotive under-hood or downhole applications. The 16-SOP (SOIC-16) body is 4.40mm wide, surface-mount, and MSL 1 (moisture sensitivity level per the datasheet), so no bake step before reflow if the bag seal is intact. It is ROHS3 compliant. No known pin-compatible second source from another manufacturer, but the TCMT4603 (same package, different CTR bin) is a functional alternative within the same family if the CTR range can be adjusted.","metaTitle":"TCMT4606 Optocoupler, 4-Ch, 3750Vrms, 16-SOIC, Active","metaDescription":"Vishay TCMT4606 quad-channel optocoupler with 3750Vrms isolation, 100-300% CTR at 5mA, 70V output, -40 to 100°C.","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":"AC, DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Number of Channels":"4","Voltage - Isolation":"3750Vrms","Vce Saturation (Max)":"300mV","Operating Temperature":"-40°C ~ 100°C","Rise / Fall Time (Typ)":"3µs, 4.7µs","Voltage - Output (Max)":"70V","Supplier Device Package":"16-SOP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"300% @ 5mA","Current Transfer Ratio (Min)":"100% @ 5mA","Voltage - Forward (Vf) (Typ)":"1.35V","Turn On / Turn Off Time (Typ)":"6µs, 5µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.31","priceTiers":[{"qty":1,"price":"$2.31000","currency":"USD"},{"qty":10,"price":"$1.53800","currency":"USD"},{"qty":100,"price":"$1.18350","currency":"USD"},{"qty":500,"price":"$1.06980","currency":"USD"},{"qty":1000,"price":"$0.91935","currency":"USD"},{"qty":2000,"price":"$0.86921","currency":"USD"},{"qty":6000,"price":"$0.84915","currency":"USD"},{"qty":10000,"price":"$0.83578","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2f9c3d8ecab5ce1d6a91087c85a0f7b2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TCMT4606/alternatives.json"},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) of TCMT4606?","answer":"The CTR is 100% minimum to 300% maximum, tested at a forward current of 5mA. This means with 5mA LED drive, the output transistor can sink 5mA to 15mA."},{"question":"Can TCMT4606 replace TCMT4603?","answer":"The TCMT4603 is a sibling in the same family with a different CTR bin. The TCMT4606 covers 100-300% CTR; the TCMT4603 has a different range. They are pin-compatible in the same 16-SOIC package, so substitution is possible if the CTR specification for the application allows the wider or shifted range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/TCMT4606","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/TCMT4606 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}