{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD817C300W","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD817C300W","canonicalUrl":"https://icboms.com/onsemi/FOD817C300W","factsUrl":"https://icboms.com/api/mcp/products/FOD817C300W","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD817C300W, 1-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 4-DIP through-hole package, 200%–400% CTR at 5 mA, active production.","salesMarkdown":"## 5000Vrms isolation in a 4-DIP through-hole package The FOD817C300W is a single-channel optoisolator from onsemi with a DC input and a phototransistor output. Its 5000Vrms isolation voltage suits it for safety-barrier applications in power supplies, motor drives, and PLC digital input modules where galvanic isolation is required between the low-voltage control side and the high-voltage field side. The current transfer ratio spans 200% minimum to 400% maximum at a forward current of 5 mA. This CTR window means the output transistor can sink enough collector current to drive a logic input or a relay coil without needing an external gain stage, as long as the load stays within the 50 mA continuous output rating and 70 V collector-emitter voltage. ## Switching speed and saturation voltage For a 24 VDC PLC input with a 3 ms hardware debounce, these edges are fast enough — but if you're driving a high-speed counter or encoder input, the 4 µs rise time limits the maximum detectable frequency to roughly 125 kHz before the output pulse width collapses. Maximum Vce saturation is 200 mV at the rated output current. That low saturation voltage keeps the power dissipation in the output transistor low, which matters when the ambient temperature climbs toward the 110°C upper limit. The part is ROHS3 compliant. Supplied in a Tube of the standard 4-DIP (0.400\", 10.16 mm) through-hole package. The through-hole body is a familiar footprint for rework — no hot-air profile needed, just a soldering iron and a desoldering pump.","metaTitle":"FOD817C300W onsemi Optoisolator 5000Vrms Transistor Output","metaDescription":"onsemi FOD817C300W optoisolator, 1-channel DC input, transistor output, 5000Vrms isolation, 200-400% CTR at 5mA, through-hole 4-DIP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Through Hole","Package / Case":"4-DIP (0.400\\\", 10.16mm)","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"FOD817","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"200mV","Operating Temperature":"-55°C ~ 110°C","Rise / Fall Time (Typ)":"4µs, 3µs","Voltage - Output (Max)":"70V","Supplier Device Package":"4-DIP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"400% @ 5mA","Current Transfer Ratio (Min)":"200% @ 5mA","Voltage - Forward (Vf) (Typ)":"1.2V","Turn On / Turn Off Time (Typ)":"-","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6500","priceTiers":[{"qty":1,"price":"$0.65000","currency":"USD"},{"qty":10,"price":"$0.40100","currency":"USD"},{"qty":100,"price":"$0.23040","currency":"USD"},{"qty":1000,"price":"$0.18035","currency":"USD"},{"qty":2000,"price":"$0.16532","currency":"USD"},{"qty":5000,"price":"$0.15029","currency":"USD"},{"qty":10000,"price":"$0.14027","currency":"USD"},{"qty":25000,"price":"$0.13526","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FOD817C300W/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the FOD817C300W?","answer":"The FOD817C300W is part of the FOD817 family. A direct cross-shop candidate is the TLP817 from Toshiba — same 4-DIP pinout, similar CTR range, and 5000Vrms isolation. The CTR bin and Vce saturation differ slightly, so confirm the minimum CTR at your operating forward current before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD817C300W","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD817C300W 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}}