{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4N28VM","brand":"onsemi","brandSlug":"onsemi","productSlug":"4N28VM","canonicalUrl":"https://icboms.com/onsemi/4N28VM","factsUrl":"https://icboms.com/api/mcp/products/4N28VM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 4N28VM optoisolator, single-channel, DC input, transistor with base output, 4170Vrms isolation, 10% min CTR, 6-DIP through-hole, tube.","salesMarkdown":"The onsemi 4N28VM is a single-channel optoisolator in a 6-DIP through-hole package, with a DC input LED driving a phototransistor output that includes a base connection for external biasing or bandwidth control. ## Switching performance and transfer ratio Turn-on and turn-off times are 2 µs typical each — this gives a practical switching ceiling around 250 kHz for a 50 % duty cycle, though the base terminal can be used to speed up turn-off with a base-emitter resistor. The output transistor is rated for 30 V collector-emitter maximum, and the LED forward voltage is 1.18 V typical at rated current — the 60 mA absolute maximum forward current allows higher drive for applications that need more output current at the cost of CTR degradation over temperature. No official successor or pin-compatible replacement is recorded from onsemi — any substitution requires a functional evaluation of the BOM position.","metaTitle":"onsemi 4N28VM Optoisolator, 4170Vrms, DIP-6, Obsolete","metaDescription":"onsemi 4N28VM single-channel transistor output optoisolator, 4170Vrms isolation, 10% min CTR at 10mA.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","Input Type":"DC","Output Type":"Transistor with Base","Mounting Type":"Through Hole","Package / Case":"6-DIP (0.300\\\", 7.62mm)","Product Status":"Obsolete","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-DIP","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d7db4dc53d56bf7e534658a700fb47e3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/4N28VM/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/4N28VM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/4N28VM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:22:03.208Z","lastPublished":"2026-07-21T06:22:03.208Z","indexable":true}}