{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SFH6156-4T","brand":"Vishay","brandSlug":"vishay","productSlug":"SFH6156-4T","canonicalUrl":"https://icboms.com/vishay/SFH6156-4T","factsUrl":"https://icboms.com/api/mcp/products/SFH6156-4T","rawCanonicalId":null},"summary":{"shortDescription":"Vishay SFH6156-4T optocoupler, 1-channel DC-input transistor output, 5300Vrms isolation, 160-320% CTR at 10mA, 70V output max, 4-SMD Gull Wing surface mount, -55°C to 100°C.","salesMarkdown":"## Galvanic isolation in a 4-SMD gull-wing package The Vishay SFH6156-4T is a single-channel phototransistor optocoupler providing 5300 Vrms of galvanic isolation between a DC input LED and a transistor output. It comes in a 4-SMD gull-wing package for surface-mount assembly, with the output transistor rated for up to 70 V and 50 mA continuous. The -4T CTR bin guarantees a current transfer ratio between 160% and 320% at a forward current of 10 mA, which determines the LED drive current needed to saturate the output for a given load. The 160% to 320% CTR range at 10 mA forward current is the key selection parameter. A higher CTR means the output transistor saturates with less LED drive, which reduces the input-side power budget and lets you use a smaller series resistor. The typical forward voltage is 1.25 V, so at 10 mA the LED dissipates about 12.5 mW. The typical turn-on time is 3 µs and turn-off is 2.3 µs, with symmetrical rise and fall times of 2 µs each. For a 10 kbps optocoupler interface those numbers leave comfortable margin; at 100 kbps the switching losses start eating into the output current capability. The 400 mV Vce saturation maximum at the rated output current means the output pull-up resistor sees a clean logic-low within 400 mV of ground. ## Active lifecycle and compliance The gull-wing leads are compatible with standard reflow profiles for 4-SMD packages.","metaTitle":"SFH6156-4T Optocoupler, 5300Vrms, 160-320% CTR","metaDescription":"Vishay SFH6156-4T optocoupler: 5300Vrms isolation, 160-320% CTR at 10mA, transistor output, -55°C to 100°C, 4-SMD Gull Wing. Active lifecycle, ROHS3.","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":"4-SMD, Gull Wing","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5300Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-55°C ~ 100°C","Rise / Fall Time (Typ)":"2µs, 2µs","Voltage - Output (Max)":"70V","Supplier Device Package":"4-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"320% @ 10mA","Current Transfer Ratio (Min)":"160% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.25V","Turn On / Turn Off Time (Typ)":"3µs, 2.3µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.63","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.63000","currency":"USD"},{"qty":10,"price":"$0.38900","currency":"USD"},{"qty":100,"price":"$0.22360","currency":"USD"},{"qty":1000,"price":"$0.17500","currency":"USD"},{"qty":2000,"price":"$0.16042","currency":"USD"},{"qty":5000,"price":"$0.14583","currency":"USD"},{"qty":10000,"price":"$0.13611","currency":"USD"},{"qty":25000,"price":"$0.13125","currency":"USD"},{"qty":50000,"price":"$0.12639","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/546f8e9fe5cf3d5e03107d1bc436a4fb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SFH6156-4T the same as SFH6156-3T?","answer":"No — the -4T and -3T suffixes denote different CTR bins. The SFH6156-4T guarantees 160% to 320% CTR at 10 mA, while the -3T bin covers a lower range. They are otherwise pin-compatible and share the same package and isolation rating, but the CTR difference affects the LED drive design. If your BOM calls for the -3T, the -4T may work with a resistor adjustment, but verify the minimum CTR against your load current requirement."},{"question":"What is the SFH6156-4T optocoupler?","answer":"The SFH6156-4T is a Vishay single-channel phototransistor optocoupler with 5300 Vrms isolation, a 160-320% current transfer ratio at 10 mA, and a transistor output rated for 70 V and 50 mA. It comes in a 4-SMD gull-wing package for surface-mount assembly and operates from -55°C to 100°C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/SFH6156-4T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/SFH6156-4T 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}}