{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SI4420DYTRPBF","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"SI4420DYTRPBF","canonicalUrl":"https://icboms.com/infineon/SI4420DYTRPBF","factsUrl":"https://icboms.com/api/mcp/products/SI4420DYTRPBF","rawCanonicalId":null},"summary":{"shortDescription":"Infineon HEXFET® SI4420DYTRPBF, N-Channel MOSFET, 30V Vdss, 9mOhm Rds(on) @ 12.5A, 10V, 78nC Qg, 8-SOIC package, -55°C to 150°C.","salesMarkdown":"## 30 V, 9 mΩ, 12.5 A — where this HEXFET fits This combination targets low-voltage, high-current switching applications: synchronous rectification in 12 V input DC-DC converters, load switches, and OR-ing circuits where the 30 V Vdss provides margin for 12 V bus transients. For a new design, the official recommendation is to select a current-production N-channel MOSFET with similar 30 V / 9 mΩ / 12.5 A ratings in an SO-8 footprint. For an existing BOM that already uses this part, the supply channel shifts to independent distribution — surplus stock, last-time-buy inventory, and broker-sourced material. Sourcing through this channel is feasible but requires qualification of date codes and verification against counterfeit risk, especially for high-reliability or safety-critical builds. ## Key ratings for the switching design The 30 V drain-to-source rating gives enough headroom for a nominal 12 V rail with ringing clamped to 24 V, but not for a 24 V system — that needs a 40 V or 60 V device. The 4.5 V drive voltage option allows logic-level gate drive from a 5 V or 3.3 V GPIO, but the Rds(on) at 4.5 V is not specified — expect it to be higher than the 9 mΩ at 10 V, so verify against the datasheet curve if using reduced gate drive. Input capacitance of 2240 pF at 15 V is moderate; switching at 200–500 kHz is practical with a standard gate driver. The 150°C rating is the junction limit — the case temperature will be lower, and the 2.5 W dissipation at 25°C ambient must be derated above 25°C per the thermal derating curve in the datasheet.","metaTitle":"SI4420DYTRPBF N-Channel MOSFET, 30V, 9mOhm, 12.5A","metaDescription":"Infineon HEXFET N-channel MOSFET, 30V Vdss, 9mOhm Rds(on) at 10V, 12.5A continuous drain. SI4420DYTRPBF datasheet and replacement info.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"HEXFET®","Package":"Tape & Reel (TR) Cut Tape (CT)","FET Type":"N-Channel","Vgs (Max)":"±20V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"1V @ 250µA","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"9mOhm @ 12.5A, 10V","Power Dissipation (Max)":"2.5W (Ta)","Supplier Device Package":"8-SO","Gate Charge (Qg) (Max) @ Vgs":"78 nC @ 10 V","Drain to Source Voltage (Vdss)":"30 V","Input Capacitance (Ciss) (Max) @ Vds":"2240 pF @ 15 V","Drive Voltage (Max Rds On, Min Rds On)":"4.5V, 10V","Current - Continuous Drain (Id) @ 25°C":"12.5A (Ta)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0b75c1867a323afc31225ca082cfd402.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for SI4420DYTRPBF?","answer":"The replacement is a current-production N-channel MOSFET with a 30 V Vdss, 9 mΩ or lower Rds(on) at 10 V, and 12.5 A or higher continuous drain current in an SO-8 package. Consult Infineon's product selector or a distributor for a pin-compatible alternative."},{"question":"Can I use SI4420DYTRPBF for 12V applications?","answer":"Yes, the 30 V drain-to-source rating provides adequate margin for 12 V nominal rails, including transients up to 24 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/SI4420DYTRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/SI4420DYTRPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}