{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRFF9231","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRFF9231","canonicalUrl":"https://icboms.com/infineon/IRFF9231","factsUrl":"https://icboms.com/api/mcp/products/IRFF9231","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies IRFF9231 N-Channel MOSFET, 150 V drain-source voltage, 4 A continuous drain current, 25 W power dissipation, TO-205AF through-hole package, Bulk.","salesMarkdown":"## TO-205AF package and board integration The IRFF9231 comes in a TO-205AF through-hole package, a metal-can variant that requires a 0.100-inch (2.54 mm) pitch hole pattern on the PCB. The metal tab is the drain terminal and must be soldered to a copper island for thermal management — the 25 W power dissipation demands a heatsink or adequate board copper area to keep the junction below the rated maximum. Rated 150 V drain-source and 4 A continuous drain current, this N-Channel MOSFET is sized for 48 V and 72 V bus systems with margin for transients. The 4 A rating is the DC limit at 25 °C case temperature — derate by the RθJC thermal resistance for actual operating conditions, especially when dissipating the full 25 W. The N-Channel polarity means the load connects between the drain and the positive supply rail, with the source tied to ground through the sense resistor or directly. Gate drive must be referenced to the source pin — a bootstrap or isolated supply is needed for high-side switching above 20 V. ## Active lifecycle — no end-of-life risk As an Infineon Technologies part, the IRFF9231 benefits from the company's established manufacturing and quality systems.","metaTitle":"IRFF9231 Infineon N-Channel MOSFET, 150V 4A TO-205AF","metaDescription":"IRFF9231 N-Channel MOSFET from Infineon Technologies, rated 150V Vds, 4A Id, 25W Pd in TO-205AF through-hole package. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"power_w":"25.0","Fet Type":"N-Channel","package_type":"Bulk","mounting_type":"Through Hole","product_status":"Active","lifecycle_stage":"eol_hot","supply_voltage_v":"150.0","switching_current_a":"4.0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0563749e50b1e6b04781b820fbf5ca2b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the power dissipation rating of the IRFF9231?","answer":"The IRFF9231 is rated for 25 W power dissipation at 25 °C case temperature. This is the maximum power the device can dissipate with proper heatsinking — actual allowable dissipation drops with rising ambient temperature per the derating curve in the datasheet."},{"question":"What is the FET type and voltage rating of the IRFF9231?","answer":"The IRFF9231 is an N-Channel MOSFET with a drain-source voltage rating of 150 V and a continuous drain current rating of 4 A. The N-Channel polarity requires the load between drain and positive rail, with gate drive referenced to source."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRFF9231","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRFF9231 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}}