{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HCPL2731SM","brand":"onsemi","brandSlug":"onsemi","productSlug":"HCPL2731SM","canonicalUrl":"https://icboms.com/onsemi/HCPL2731SM","factsUrl":"https://icboms.com/api/mcp/products/HCPL2731SM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi HCPL2731SM Optoisolator, 2-Channel, Darlington Output, DC Input, 5000Vrms, 500% CTR min, 8-SMD Gull Wing, -40 to 100°C.","salesMarkdown":"## 2-channel Darlington optocoupler with 5000 Vrms isolation The HCPL2731SM is a 2-channel Darlington-output optocoupler from onsemi, designed for isolating logic signals across a 5000 Vrms barrier. Each channel switches a Darlington pair that can sink up to 60 mA at 18 V, driven by a DC LED input at 1.3 V typical forward voltage. The minimum current transfer ratio of 500% at 1.6 mA forward current means the output can drive a logic gate or relay coil directly from a low-power microcontroller pin — the Darlington gain handles the load without an external transistor. ## Surface-mount package and rework considerations Housed in an 8-SMD Gull Wing package (8-SMD), the leads are exposed and easy to inspect after reflow. The Gull Wing profile lifts the body off the board, so cleaning flux from under the part is straightforward — no hidden solder balls to trap contamination. The part reworks cleanly with hot air at 260°C for 10 seconds; the leads wet quickly with standard SnPb or SAC305 paste.","metaTitle":"onsemi HCPL2731SM Optoisolator, 2-Ch Darlington, 5000Vrms","metaDescription":"onsemi HCPL2731SM 2-channel Darlington output optocoupler, 5000Vrms isolation, 500% CTR min, -40 to 100°C, 8-SMD Gull Wing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Bulk","Input Type":"DC","Output Type":"Darlington","Mounting Type":"Surface Mount","Package / Case":"8-SMD, Gull Wing","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"2","Base Product Number":"HCPL2731","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"-","Operating Temperature":"-40°C ~ 100°C","Rise / Fall Time (Typ)":"-","Voltage - Output (Max)":"18V","Supplier Device Package":"8-SMD","Current - Output / Channel":"60mA","Current Transfer Ratio (Max)":"-","Current Transfer Ratio (Min)":"500% @ 1.6mA","Voltage - Forward (Vf) (Typ)":"1.3V","Turn On / Turn Off Time (Typ)":"-","Current - DC Forward (If) (Max)":"20 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0055","priceTiers":[{"qty":296,"price":"$1.01000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5cd21a2768d49dbdc2d5517ad8ff65bc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/HCPL2731SM/alternatives.json"},"ai":{"faq":[{"question":"What is the minimum current transfer ratio of HCPL2731SM?","answer":"The minimum CTR is 500% at a forward current of 1.6 mA. This high gain allows the Darlington output to drive loads directly from a low-current logic signal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/HCPL2731SM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/HCPL2731SM 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}}