{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4N32SR2M","brand":"onsemi","brandSlug":"onsemi","productSlug":"4N32SR2M","canonicalUrl":"https://icboms.com/onsemi/4N32SR2M","factsUrl":"https://icboms.com/api/mcp/products/4N32SR2M","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 4N32SR2M, 1-channel DC-input Darlington-output optoisolator, 4170 Vrms isolation, 500% min CTR at 10 mA, 150 mA max output, 6-SMD gull-wing package, -40°C to 100°C.","salesMarkdown":"## Darlington gain for low-drive BOMs The 4N32SR2M delivers a minimum current transfer ratio of 500% at 10 mA forward current, meaning a 10 mA LED input can saturate the output Darlington pair to drive up to 50 mA without additional transistor stages. This gain margin lets you use a lower-value series resistor on the LED side, saving board space and reducing thermal load in dense PLC or relay-driver cards. ## 4170 Vrms isolation and 150 mA output ceiling Rated for 4170 Vrms isolation, this part meets reinforced insulation requirements for 230 VAC mains in industrial control and motor-drive applications. The output Darlington can sink up to 150 mA continuous with a maximum Vce saturation of 1 V, which keeps power dissipation low enough for the 6-SMD gull-wing package without a heatsink. ## Switching speed limits PWM use Turn-on time is 5 µs typical, but turn-off time can reach 100 µs maximum. That asymmetry means the output may not fully turn off between pulses above about 5 kHz switching frequency. For low-speed digital isolation — think 24 VDC sensor inputs, relay coil drives, or AC mains zero-cross detection — the speed is adequate. For PWM motor control above a few kilohertz, a transistor-output optoisolator like the 4N38SM with 5 µs turn-off is a better fit. ## Surface-mount assembly and rework Housed in a 6-SMD gull-wing package, the 4N32SR2M is compatible with standard reflow soldering profiles and allows visual inspection of solder joints. The gull-wing leads are reworkable with hot air without damaging adjacent components — a practical advantage over leadless packages in prototype or low-volume production. ## Active production, RoHS3 compliant onsemi lists the 4N32SR2M as Active and fully RoHS3 compliant.","metaTitle":"4N32SR2M onsemi Optoisolator – 4170Vrms Darlington Output","metaDescription":"onsemi 4N32SR2M optoisolator: DC input, Darlington with base output, 4170Vrms isolation, 500% min CTR, 150mA output, -40°C to 100°C, 6-SMD gull wing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","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% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.2V","Turn On / Turn Off Time (Typ)":"5µs, 100µs (Max)","Current - DC Forward (If) (Max)":"80 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.84","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.84000","currency":"USD"},{"qty":10,"price":"$0.54600","currency":"USD"},{"qty":100,"price":"$0.35770","currency":"USD"},{"qty":1000,"price":"$0.28240","currency":"USD"},{"qty":2000,"price":"$0.26357","currency":"USD"},{"qty":5000,"price":"$0.25416","currency":"USD"},{"qty":10000,"price":"$0.25039","currency":"USD"},{"qty":25000,"price":"$0.24474","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3b7a0e595c13b969737948a1da9a0357.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is 4N32SR2M equivalent to the standard 4N32?","answer":"Electrically, the 4N32SR2M shares the same Darlington output, 4170 Vrms isolation, 500% min CTR, and 150 mA output rating as the through-hole 4N32. The difference is the package: the SR2M suffix designates the 6-SMD gull-wing surface-mount variant, while the standard 4N32VM comes in a through-hole DIP. If your board is laid out for a DIP footprint, the SR2M will not fit without an adapter."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/4N32SR2M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/4N32SR2M when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:07:07.581Z","lastPublished":"2026-07-17T20:07:07.581Z","indexable":true}}