{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MCT5211M","brand":"onsemi","brandSlug":"onsemi","productSlug":"MCT5211M","canonicalUrl":"https://icboms.com/onsemi/MCT5211M","factsUrl":"https://icboms.com/api/mcp/products/MCT5211M","rawCanonicalId":null},"summary":{"shortDescription":"onsemi MCT5211M optoisolator, DC input, transistor with base output, 1 channel, 4170Vrms isolation, 150mA output, 6-DIP through hole, tube.","salesMarkdown":"## Signal isolation for DC-coupled circuits The onsemi MCT5211M is a single-channel optoisolator in a 6-DIP through-hole package, designed to pass DC-level signals across a 4170Vrms isolation barrier. The output is a phototransistor with the base brought out to a separate pin, which gives the designer the option to bias the base for faster switching or to connect a base-emitter resistor for noise immunity in high-impedance circuits. With a minimum current transfer ratio of 150% at a forward current of 1.6 mA, this part drives a logic-level load from a low-power microcontroller pin without an external buffer. The 150 mA continuous output current and 30 V output rating cover most PLC digital input modules and industrial sensor interfaces. ## Switching speed and saturation margin Typical turn-on time is 14 µs and turn-off is 2.5 µs, which suits 10 kHz to 50 kHz switching applications like relay drivers, solenoid valves, and motor contactor feedback. The forward voltage is 1.25 V typical at the LED, and the absolute maximum DC forward current is 50 mA — a 330 Ω series resistor from a 5 V supply limits the LED current to about 11 mA, well within the safe operating area while still achieving the 150% CTR minimum.","metaTitle":"onsemi MCT5211M Optoisolator, 4170Vrms, 150mA, 6-DIP","metaDescription":"onsemi MCT5211M optoisolator: 4170Vrms isolation, 150mA output, 150% CTR at 1.6mA. Active production, ROHS3 compliant. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"DC","Output Type":"Transistor with Base","Mounting Type":"Through Hole","Package / Case":"6-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"4170Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-40°C ~ 100°C","Voltage - Output (Max)":"30V","Supplier Device Package":"6-DIP","Current - Output / Channel":"150mA","Current Transfer Ratio (Min)":"150% @ 1.6mA","Voltage - Forward (Vf) (Typ)":"1.25V","Turn On / Turn Off Time (Typ)":"14µs, 2.5µs","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.45","stockQuantity":18,"priceTiers":[{"qty":1,"price":"$1.45000","currency":"USD"},{"qty":10,"price":"$0.91900","currency":"USD"},{"qty":100,"price":"$0.67980","currency":"USD"},{"qty":500,"price":"$0.62464","currency":"USD"},{"qty":1000,"price":"$0.51441","currency":"USD"},{"qty":2000,"price":"$0.48870","currency":"USD"},{"qty":5000,"price":"$0.47767","currency":"USD"},{"qty":10000,"price":"$0.46665","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/79fd3b596438bdd4ee9aa708420cea90.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source to the MCT5211M?","answer":"The closest functional peer is the FODM8801C, which also uses a DC input and transistor output, but it is a surface-mount device in a different package. The MCT5211M is through-hole 6-DIP and will not drop into a board laid out for the FODM8801C without a PCB change."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/MCT5211M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/MCT5211M 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}}