{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SFH6186-4","brand":"Vishay","brandSlug":"vishay","productSlug":"SFH6186-4","canonicalUrl":"https://icboms.com/vishay/SFH6186-4","factsUrl":"https://icboms.com/api/mcp/products/SFH6186-4","rawCanonicalId":null},"summary":{"shortDescription":"Vishay SFH6186-4 optocoupler, DC input, transistor output, 5300Vrms isolation, 160-320% CTR at 1mA, 55V output, 4-SMD gull wing package, -55°C to 100°C, Tube.","salesMarkdown":"## What this optocoupler is and where it goes The Vishay SFH6186-4 is a single-channel phototransistor optocoupler with a DC input LED and a 5300 Vrms isolation rating. It comes in a 4-SMD gull-wing package, which is hand-solderable and easy to inspect under a microscope — a relief if you are reworking a board that already has components on the other side. The 160% to 320% current transfer ratio at 1 mA forward current means you can drive the LED with a standard logic-level signal and still get a clean logic output on the other side of the isolation barrier. The CTR is the ratio of output transistor current to input LED current. At 1 mA forward current, the SFH6186-4 guarantees a minimum CTR of 160% and a maximum of 320%. That means with 1 mA into the LED, the output transistor can sink at least 1.6 mA and up to 3.2 mA — enough to pull a 5 V CMOS or TTL input low through a reasonable pull-up resistor. The 55 V output rating gives headroom for driving relays or higher-voltage logic families as well. If you are running the LED at a lower current to save power, the CTR will drop; the datasheet curve (not reproduced here) shows the typical behaviour, but the guaranteed numbers at 1 mA are the ones to design to. ## Isolation voltage and temperature range The 5300 Vrms isolation rating qualifies this part for reinforced insulation in mains-connected equipment — think industrial motor drives, power supplies, and medical devices where you need to protect low-voltage control circuitry from high-voltage transients. The 6 µs turn-on and 5.5 µs turn-off times are adequate for 10-100 kHz switching or status feedback; for faster data rates you would look at a logic-output optocoupler. ## Package and rework notes The 4-SMD gull-wing package has a 2.54 mm pin pitch and stands off the board, so you can get a soldering iron tip under the leads if you need to replace it. The part ships in Tube, which is fine for prototyping and low-volume production; if you need Tape & Reel for automated assembly, check the SFH6186-4T variant.","metaTitle":"SFH6186-4 Optoisolator, 5300Vrms, 160-320% CTR","metaDescription":"SFH6186-4 Vishay optocoupler: 5300Vrms isolation, 160-320% CTR at 1mA, 55V output, -55°C to 100°C. Active lifecycle, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","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)":"3.5µs, 5µs","Voltage - Output (Max)":"55V","Supplier Device Package":"4-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"320% @ 1mA","Current Transfer Ratio (Min)":"160% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.1V","Turn On / Turn Off Time (Typ)":"6µs, 5.5µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.90000","currency":"USD"},{"qty":10,"price":"$0.58600","currency":"USD"},{"qty":100,"price":"$0.38380","currency":"USD"},{"qty":1000,"price":"$0.30300","currency":"USD"},{"qty":2000,"price":"$0.28280","currency":"USD"},{"qty":5000,"price":"$0.27270","currency":"USD"},{"qty":10000,"price":"$0.26866","currency":"USD"},{"qty":25000,"price":"$0.26260","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4bb15ce016d1cbb8f2e268ef9c695016.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) range of SFH6186-4?","answer":"The SFH6186-4 guarantees a CTR range of 160% minimum to 320% maximum, both measured at 1 mA forward current. This is the '4' bin in the SFH6186 family."},{"question":"What is the difference between SFH6186-4 and SFH6186-3?","answer":"The difference is the CTR bin. The SFH6186-3 has a CTR range of 100% to 200% at 1 mA, while the SFH6186-4 covers 160% to 320%. The SFH6186-4 gives you more output drive for the same LED current, which can be useful if you need to drive a heavier load or want more margin on the logic threshold. Both parts are pin-compatible and share the same package and isolation rating."},{"question":"Is SFH6186-4 compatible with 5V logic systems?","answer":"Yes. With a minimum CTR of 160% at 1 mA, the output transistor can sink over 1.6 mA — enough to pull a 5 V TTL or CMOS input low through a 2.2 kΩ pull-up resistor. The 55 V output rating also means it can interface with higher-voltage logic families."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/SFH6186-4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/SFH6186-4 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}}