{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"H11B1SR2VM","brand":"onsemi","brandSlug":"onsemi","productSlug":"H11B1SR2VM","canonicalUrl":"https://icboms.com/onsemi/H11B1SR2VM","factsUrl":"https://icboms.com/api/mcp/products/H11B1SR2VM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi H11B1SR2VM optoisolator, 1-channel DC input, Darlington with base output, 4170 Vrms isolation, 500% min CTR at 1 mA, 150 mA output, 6-SMD Gull Wing, Bulk.","salesMarkdown":"## Darlington output with base access — what it means for the BOM The H11B1SR2VM is a 1-channel optoisolator from onsemi with a Darlington phototransistor output that brings the base terminal out to a separate pin. This base-access pin lets you add a speed-up resistor or a pull-down to tailor the switching threshold and turn-off time — useful when driving a logic input that needs a clean edge rather than a slow Darlington saturation ramp. Rated for 4170 Vrms isolation, the part provides galvanic separation between a low-voltage DC control side and a higher-voltage load side, with the output capable of sinking 150 mA continuous at up to 30 V. The minimum current transfer ratio of 500% at 1 mA forward current means the LED drive current can be kept low — a 1 mA input yields at least 5 mA of collector current at the output, which is enough to saturate the Darlington pair and drive a relay coil or a PLC input module directly. ## Switching speed and the base-pin trade-off Turn-on time is 25 µs typical, turn-off 18 µs typical — these are slower than a standard phototransistor opto because the Darlington pair's internal gain stores more base charge. The base pin lets you add a resistor between base and emitter to speed up turn-off at the cost of reduced effective CTR; without it the part is best suited for DC-level or low-frequency switching (below ~10 kHz) where the 25 µs delay is negligible. Operating temperature spans -40°C to 100°C, covering industrial cabinet and appliance environments. The 6-SMD Gull Wing package is reflow-compatible and occupies the same footprint as the industry-standard 6-pin DIP Gull Wing — no board spin needed if migrating from a through-hole H11B1 variant.","metaTitle":"onsemi H11B1SR2VM Optoisolator, Darlington Output, 4170 Vrms","metaDescription":"onsemi H11B1SR2VM optoisolator, 1-channel Darlington with base, 4170 Vrms isolation, 500% min CTR at 1 mA, 150 mA output, 6-SMD Gull Wing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Bulk","Input Type":"DC","Output Type":"Darlington with Base","Mounting Type":"Surface Mount","Package / Case":"6-SMD, Gull Wing","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"4170Vrms","Vce Saturation (Max)":"1V","Operating Temperature":"-40°C ~ 100°C","Voltage - Output (Max)":"30V","Supplier Device Package":"6-SMD","Current - Output / Channel":"150mA","Current Transfer Ratio (Min)":"500% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.2V","Turn On / Turn Off Time (Typ)":"25µs, 18µs","Current - DC Forward (If) (Max)":"80 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.88","stockQuantity":21,"priceTiers":[{"qty":1092,"price":"$0.27000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3b7a0e595c13b969737948a1da9a0357.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will H11B1SR2VM drop into a board designed for 4N25SR2M?","answer":"The H11B1SR2VM and 4N25SR2M share the same 6-SMD Gull Wing footprint and 4170 Vrms isolation rating, so the mechanical fit and creepage are identical. The functional difference is output type: the H11B1 uses a Darlington pair with base access (500% min CTR, 25 µs turn-on), while the 4N25 uses a single phototransistor (100% min CTR, 2 µs turn-on). If the downstream circuit expects the higher gain and slower switching of a Darlington, the H11B1 is a drop-in; if it needs the faster edge of a transistor output, the 4N25 is the closer match."},{"question":"What is the input type and output configuration?","answer":"DC input on the LED side, Darlington with base on the output side. The base pin is brought out separately, allowing external biasing or speed-up components."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/H11B1SR2VM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/H11B1SR2VM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}