{"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. Each channel can handle up to 50mA output current and 70V across the transistor, making it suitable for logic-level interfacing, PLC I/O modules, and industrial sensor isolation where board space is tight — four channels in one SOIC footprint instead of four separate DIP-4 parts. ## CTR range and drive margin The current transfer ratio spans 100% to 300% at a forward current of 5mA. That means with 5mA into the LED, the output transistor can sink between 5mA and 15mA — enough to drive a CMOS logic input or a small relay coil directly. 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. ## Switching speed and timing budget 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. ## Temperature range and environment 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. ## Lifecycle and sourcing 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","stockQuantity":0,"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},"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":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}