{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD3125","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD3125","canonicalUrl":"https://icboms.com/onsemi/FOD3125","factsUrl":"https://icboms.com/api/mcp/products/FOD3125","rawCanonicalId":null},"summary":{"shortDescription":"onsemi OPTOPLANAR® series, single-channel gate drive optoisolator, 8-DIP through-hole package, 5000Vrms isolation, 3A peak output, 125°C operating range","salesMarkdown":"## Gate drive optoisolator for industrial power stages The FOD3125 is a single-channel gate drive optoisolator from onsemi's OPTOPLANAR® series, designed to drive IGBTs and MOSFETs in motor drives, UPS systems, and industrial power supplies. It provides 5000Vrms of galvanic isolation between the controller and the power stage, with a peak output current of 3A to handle gate charge delivery at switching frequencies up to several hundred kilohertz. The through-hole 8-DIP package (0.300-inch body width) is a standard footprint for high-isolation optocouplers, making it a drop-in replacement in existing designs without layout changes. ## Parametric strengths for switching applications The 3A peak output current and 2A source/sink capability allow the FOD3125 to drive medium-power IGBTs and MOSFETs directly, reducing the need for a separate buffer stage. Typical rise and fall times of 60ns keep switching losses low, while a maximum propagation delay of 400ns and pulse width distortion of 100ns maintain timing accuracy in PWM loops. Common-mode transient immunity of 35kV/µs minimum is the standout spec for motor drive environments: it prevents the output from false-triggering when the power stage switches at high dv/dt, which is a common failure mode in cheaper optocouplers. The operating temperature range from -40°C to 125°C covers both cold-start conditions and the elevated ambient inside a sealed inverter enclosure. The input side requires a forward voltage of 1.5V typical with a maximum DC forward current of 25 mA, compatible with standard 3.3V or 5V logic outputs through a current-limiting resistor. ## Sourcing and lifecycle status It is ROHS3 compliant and UL approved. The through-hole 8-DIP package is widely stocked across distribution channels; lead times are typically manageable for a mature optoisolator line. For BOM planning, the part is single-sourced to onsemi, but the OPTOPLANAR® series has been stable for years with no PCN activity. ## Package and design-in notes The 8-DIP package (0.300-inch row spacing, 7.62mm body width) is a through-hole format that suits both prototyping and production. The 8-PDIP supplier device package has a standard 2.54mm pin pitch, which simplifies manual assembly and rework. No exposed thermal pad — the part relies on the DIP body's natural convection for heat dissipation, so derate the output current if ambient exceeds 85°C.","metaTitle":"FOD3125 onsemi Optoisolator – 5000Vrms, 3A Gate Driver","metaDescription":"onsemi FOD3125 OPTOPLANAR® gate drive optoisolator: 5000Vrms isolation, 3A peak output, 125°C rating, 35kV/µs CMTI. Active production.","metaKeywords":null},"attributes":{"series":"OPTOPLANAR®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Series":"OPTOPLANAR®","Package":"Tube","Technology":"Optical Coupling","Mounting Type":"Through Hole","Package / Case":"8-DIP (0.300\\\", 7.62mm)","Approval Agency":"UL","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Current - Peak Output":"3A","Operating Temperature":"-40°C ~ 125°C","Rise / Fall Time (Typ)":"60ns, 60ns","Supplier Device Package":"8-PDIP","Voltage - Output Supply":"15V ~ 30V","Current - Output High, Low":"2A, 2A","Pulse Width Distortion (Max)":"100ns","Voltage - Forward (Vf) (Typ)":"1.5V","Current - DC Forward (If) (Max)":"25 mA","Propagation Delay tpLH / tpHL (Max)":"400ns, 400ns","Common Mode Transient Immunity (Min)":"35kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.79","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.79000","currency":"USD"},{"qty":10,"price":"$2.68000","currency":"USD"},{"qty":100,"price":"$2.19500","currency":"USD"},{"qty":500,"price":"$1.85040","currency":"USD"},{"qty":1000,"price":"$1.69726","currency":"USD"},{"qty":2000,"price":"$1.62707","currency":"USD"},{"qty":5000,"price":"$1.59517","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e48766944375c63dcb075aba9e91240f.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD3125","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD3125 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:11:05.035Z","lastPublished":"2026-07-17T20:11:05.035Z","indexable":true}}