{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SFH628A-4","brand":"Vishay","brandSlug":"vishay","productSlug":"SFH628A-4","canonicalUrl":"https://icboms.com/vishay/SFH628A-4","factsUrl":"https://icboms.com/api/mcp/products/SFH628A-4","rawCanonicalId":null},"summary":{"shortDescription":"Vishay SFH628A-4 optoisolator, 5300Vrms isolation, transistor output, 160%-500% CTR at 1mA, AC/DC input, 4-DIP through-hole package, -55°C to 100°C.","salesMarkdown":"## 5300Vrms isolation in a 4-DIP through-hole package The Vishay SFH628A-4 is a single-channel optoisolator with a transistor output, rated for 5300Vrms isolation. It comes in a 4-DIP through-hole package (0.300\", 7.62mm pitch), making it a drop-in fit for boards that need a reinforced safety barrier between primary and secondary sides—think industrial motor drives, PLC digital inputs, or AC-line sensing circuits where galvanic isolation is non-negotiable. The input side accepts both AC and DC signals, so you can couple a line waveform or a DC logic level through the same LED without worrying about polarity. The current transfer ratio ranges from 160% minimum to 500% maximum, both specified at 1 mA forward current. That means with 1 mA through the LED, the output transistor can sink at least 1.6 mA and up to 5 mA. For a typical 5 V logic input, a 10 kΩ pull-up resistor needs only 0.5 mA from the output—well within the CTR floor, even with LED aging and temperature derating. The wide CTR spread (bin '4') lets you design for the minimum and still have headroom, without over-driving the LED. Output saturation is capped at 400 mV (Vce(sat)), which keeps the logic-low voltage clean for TTL or CMOS inputs. The output transistor is rated for 55 V and 50 mA continuous, so it can drive a small relay coil or a downstream optocoupler directly. ## -55°C to 100°C — industrial and cold-environment ready The wide range also means the CTR and switching times (3.5 µs rise, 5 µs fall typical) stay predictable across temperature extremes—important when the opto is part of a feedback loop or a safety-rated digital input.","metaTitle":"SFH628A-4 Optoisolator, 5300Vrms, 4-DIP, Through Hole","metaDescription":"SFH628A-4 optoisolator with 5300Vrms isolation, transistor output, 160%-500% CTR at 1mA, -55°C to 100°C, 4-DIP through-hole. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"AC, DC","Output Type":"Transistor","Mounting Type":"Through Hole","Package / Case":"4-DIP (0.300\\\", 7.62mm)","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-DIP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"500% @ 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)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.22","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.22000","currency":"USD"},{"qty":10,"price":"$0.77500","currency":"USD"},{"qty":100,"price":"$0.57360","currency":"USD"},{"qty":500,"price":"$0.52712","currency":"USD"},{"qty":1000,"price":"$0.43410","currency":"USD"},{"qty":2000,"price":"$0.41240","currency":"USD"},{"qty":5000,"price":"$0.40309","currency":"USD"},{"qty":10000,"price":"$0.39379","currency":"USD"},{"qty":25000,"price":"$0.38759","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5cecdb57731034bf66ec4e2d47ef922d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SFH628A-4 compatible with AC input?","answer":"Yes, the input type is specified as both AC and DC, so it can couple AC line signals or DC logic levels without polarity concern."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/SFH628A-4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/SFH628A-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}}