{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4N25SR2M","brand":"onsemi","brandSlug":"onsemi","productSlug":"4N25SR2M","canonicalUrl":"https://icboms.com/onsemi/4N25SR2M","factsUrl":"https://icboms.com/api/mcp/products/4N25SR2M","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 4N25SR2M, single-channel DC-input optoisolator with transistor base output, 4170Vrms isolation, 20% min CTR at 10mA, 30V output max, surface-mount 6-SMD gull-wing package, -40°C to 100°C operating range.","salesMarkdown":"## 4170Vrms isolation for motor-drive and PLC noise barriers The 4N25SR2M is a single-channel optoisolator from onsemi that breaks ground loops with 4170Vrms isolation — enough to keep 480VAC drive transients off the logic side. The DC input drives an IR LED; the output is a phototransistor with a base pin, so you can bias the transistor for faster switching or use it as a simple switch. The 20% minimum CTR at 10mA forward current means you need at least 2mA on the output side to pull a logic line low — factor that into your pull-up resistor value. ## Switching speed and output drive for 24V logic rails Turn-on and turn-off times are both 2µs typical, which limits the data rate to about 250 kbps — fine for PLC input modules, relay replacement, or status feedback, but not for high-speed serial links. The output transistor is rated for 30V collector-emitter, so it sits comfortably on 24V PLC rails with headroom for spikes. The base pin is brought out — you can add a resistor to ground to speed up turn-off, or leave it open for standard operation. ## Active production, surface-mount assembly, industrial temperature range The 6-SMD gull-wing package is pick-and-place friendly and reflow-solderable — no hand-soldering required unless you are doing a field repair. Operating from -40°C to 100°C, it covers outdoor cabinets, factory floors, and under-hood environments without derating.","metaTitle":"4N25SR2M onsemi Optoisolator 4170Vrms DC Input Transistor","metaDescription":"4N25SR2M onsemi optoisolator: 4170Vrms isolation, 20% min CTR at 10mA, 30V output, -40°C to 100°C. Active production, ROHS3, surface-mount 6-SMD gull wing.","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":"4N25","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)":"20% @ 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":"$0.7000","priceTiers":[{"qty":1,"price":"$0.70000","currency":"USD"},{"qty":10,"price":"$0.46100","currency":"USD"},{"qty":100,"price":"$0.30490","currency":"USD"},{"qty":1000,"price":"$0.23539","currency":"USD"},{"qty":2000,"price":"$0.21271","currency":"USD"},{"qty":5000,"price":"$0.19853","currency":"USD"},{"qty":10000,"price":"$0.19144","currency":"USD"},{"qty":25000,"price":"$0.18860","currency":"USD"},{"qty":50000,"price":"$0.18080","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d7db4dc53d56bf7e534658a700fb47e3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/4N25SR2M/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 4N25SR2M?","answer":"The 4N28SR2VM is a near-match: same package, same isolation voltage, same switching speed, same temperature range. The main difference is the CTR spec — check your margin. 4N37SR2M and 4N35SR2M are also in the same family with lower Vce saturation (300mV vs 500mV), which matters if you are driving a low-voltage logic input directly."},{"question":"Does the 4N25SR2M have a base pin?","answer":"Yes — the output is a phototransistor with the base brought out to pin 6. You can use it to bias the transistor for faster switching or leave it open for standard operation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/4N25SR2M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/4N25SR2M 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}}