{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4N28SR2VM","brand":"onsemi","brandSlug":"onsemi","productSlug":"4N28SR2VM","canonicalUrl":"https://icboms.com/onsemi/4N28SR2VM","factsUrl":"https://icboms.com/api/mcp/products/4N28SR2VM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 4N28SR2VM, single-channel DC-input optoisolator, transistor with base output, 4170 Vrms isolation, 6-SMD gull-wing package, -40°C to 100°C operating range.","salesMarkdown":"## Isolation and switching – what the ratings drive Rated for 4170 Vrms isolation – this is the withstand voltage between input LED and output phototransistor. It suits galvanic isolation in off-line power supplies, motor-drive feedback, and industrial PLC I/O modules where a transient surge could otherwise couple through to the logic side. Minimum current transfer ratio is 10% at If = 10 mA. That means with 10 mA through the LED, the output transistor can sink at least 1 mA of collector current. For a 5 V logic input, a 4.7 kΩ pull-up resistor on the collector gives a clean logic-low; the CTR floor guarantees saturation across temperature and LED ageing. Turn-on and turn-off times are both 2 µs typical. That caps the usable data rate at roughly 250 kbps for non-return-to-zero signalling – fine for 115.2 kbps UART isolation or low-speed PWM gate drive, but not for high-speed CAN or Ethernet isolation. ## Temperature range and package – board-fit notes The upper limit is 100°C, not the 125°C common on automotive optoisolators – so this part fits industrial enclosures and outdoor telecom cabinets, but not under-hood engine electronics. Housed in a 6-SMD gull-wing package. The gull-wing leads are visible for solder-joint inspection and rework-friendly with a hot-air station. The 6-SMD footprint is shared with the 4N25 and 4N37 families, making it a drop-in swap if the CTR or Vce(sat) specs align with the application. ## Sourcing and quoting – what to expect","metaTitle":"4N28SR2VM Optoisolator – onsemi, 4170 Vrms","metaDescription":"onsemi 4N28SR2VM single-channel optoisolator: 4170 Vrms isolation, 10% min CTR at 10 mA, 2 µs switching, -40°C to 100°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Input Type":"DC","Output Type":"Transistor with Base","Mounting Type":"Surface Mount","Package / Case":"6-SMD, Gull Wing","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"4N28","Voltage - Isolation":"4170Vrms","Vce Saturation (Max)":"500mV","Operating Temperature":"-40°C ~ 100°C","Rise / Fall Time (Typ)":"-","Voltage - Output (Max)":"30V","Supplier Device Package":"6-SMD","Current - Output / Channel":"-","Current Transfer Ratio (Max)":"-","Current Transfer Ratio (Min)":"10% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.18V","Turn On / Turn Off Time (Typ)":"2µs, 2µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9400","priceTiers":[{"qty":1,"price":"$0.94000","currency":"USD"},{"qty":10,"price":"$0.61500","currency":"USD"},{"qty":100,"price":"$0.40280","currency":"USD"},{"qty":1000,"price":"$0.31800","currency":"USD"},{"qty":2000,"price":"$0.29680","currency":"USD"},{"qty":5000,"price":"$0.28620","currency":"USD"},{"qty":10000,"price":"$0.28196","currency":"USD"},{"qty":25000,"price":"$0.27560","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d7db4dc53d56bf7e534658a700fb47e3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/4N28SR2VM/alternatives.json"},"ai":{"faq":[{"question":"Is 4N28SR2VM a direct replacement for 4N25SR2M?","answer":"The 4N25SR2M shares the same isolation voltage (4170 Vrms), package (6-SMD gull wing), and switching speed (2 µs). The key difference is the minimum CTR: 4N28SR2M specifies 10% at 10 mA, while the 4N25SR2M typically has a higher CTR floor. Check the CTR requirement in your circuit before swapping – if the design margin is tight, the 4N28 may not saturate the output at the same LED current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/4N28SR2VM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/4N28SR2VM 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}}