{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD3NK50Z-1","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD3NK50Z-1","canonicalUrl":"https://icboms.com/stmicroelectronics/STD3NK50Z-1","factsUrl":"https://icboms.com/api/mcp/products/STD3NK50Z-1","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SuperMESH N-Channel MOSFET, 500 V Vdss, 2.3 A Id, 3.3 Ohm Rds(on) @ 1.15 A, 10 V, Through Hole TO-251-3 (IPAK), -55°C to 150°C.","salesMarkdown":"The STMicroelectronics STD3NK50Z-1 is a 500 V N-channel MOSFET from the SuperMESH series, built with ST's proprietary strip-layout technology that reduces on-resistance per unit area. It delivers a continuous drain current of 2.3 A at the case temperature and features a maximum on-resistance of 3.3 Ohm at 10 V gate drive. No last-time-buy window remains open through the franchised channel. The IPAK (TO-251) package variant is less common than the DPAK (TO-252) sibling STD3NK50Z, so stock may be thinner. When quoting, confirm date code and traceability; independent stock is typically non-franchised and sold as-is. The 500 V drain-source voltage rating places this part squarely in offline primary-side switching — flyback, forward, and PFC stages up to about 250 W output. The 2.3 A continuous current is derated from the 45 W power dissipation limit; at 150°C case temperature the usable current drops significantly, so a heatsink or forced airflow is assumed for full-rated output. Gate charge is 15 nC at 10 V, so the gate-drive power requirement is modest; a standard PWM controller with 1 A drive capability switches it cleanly at 60–100 kHz. Input capacitance of 280 pF at 25 V keeps the switching node capacitance low, helping maintain efficiency at higher frequencies.","metaTitle":"STD3NK50Z-1 N-Channel MOSFET, 500 V, 2.3 A, obsolete","metaDescription":"STD3NK50Z-1 SuperMESH N-channel MOSFET, 500 V Vdss, 2.3 A Id, 3.3 Ohm Rds(on).","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"SuperMESH™","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±30V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Through Hole","Package / Case":"TO-251-3 Short Leads, IPak, TO-251AA","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"4.5V @ 50µA","Base Product Number":"STD3N","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"3.3Ohm @ 1.15A, 10V","Power Dissipation (Max)":"45W (Tc)","Supplier Device Package":"IPAK","Gate Charge (Qg) (Max) @ Vgs":"15 nC @ 10 V","Drain to Source Voltage (Vdss)":"500 V","Input Capacitance (Ciss) (Max) @ Vds":"280 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"2.3A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/152c7147073494d66761e6bd4fd14029.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STD3NK50Z-1/alternatives.json"},"ai":{"faq":[{"question":"Is STD3NK50Z-1 obsolete?","answer":"Yes, STMicroelectronics lists the STD3NK50Z-1 as Obsolete. No last-time-buy is available through the franchised channel. Supply is limited to independent-distributor surplus or broker-held inventory."},{"question":"What is the replacement for STD3NK50Z-1?","answer":"ST does not list a direct pin-compatible replacement for the STD3NK50Z-1 in the IPAK package. The surface-mount DPAK sibling STD3NK50Z shares the same die but requires a different footprint. For a through-hole replacement, look at ST's current SuperMESH3 or SuperMESH5 families (e.g., STx3NK50Z series) — verify pinout and gate-drive voltage compatibility against the original design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD3NK50Z-1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD3NK50Z-1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:15:47.171Z","lastPublished":"2026-07-16T15:15:47.171Z","indexable":true}}