{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STP85NF55L","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STP85NF55L","canonicalUrl":"https://icboms.com/stmicroelectronics/STP85NF55L","factsUrl":"https://icboms.com/api/mcp/products/STP85NF55L","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STripFET™ II STP85NF55L, N-Channel MOSFET, 55 V Vdss, 80 A Id, 8 mΩ Rds(on) @ 40 A / 10 V, 110 nC Qg, TO-220-3, -55 to 175 °C.","salesMarkdown":"The TO-220-3 through-hole package carries a 300 W power dissipation rating at the case, so a heatsink is expected for any sustained load above a few amps. The 55 V Vdss gives about 20 % headroom on a 48 V telecom bus or a 42 V automotive load-dump clamp — enough for most non-automotive rails. The 80 A continuous rating at 25 °C case temperature is a package-limited number; real-world current is lower once the junction temperature and switching losses are factored in. The 8 mΩ Rds(on) is specified at 10 V gate drive, but the device is also characterised at 5 V (drive voltage range 5 V to 10 V), so a logic-level gate driver can turn it fully on if the supply is at least 5 V. Gate charge is 110 nC at 5 V — moderate for a 55 V / 80 A die, meaning a standard gate-driver IC can switch it in the tens-of-kilohertz range without excessive drive loss.","metaTitle":"STP85NF55L N-Channel MOSFET, 55V 80A, TO-220, Obsolete","metaDescription":"STP85NF55L N-Channel MOSFET from STMicroelectronics STripFET™ II series. 55 V drain-source, 80 A continuous drain, 8 mΩ Rds(on) at 10 V. TO-220 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"STripFET™ II","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±15V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"2.5V @ 250µA","Base Product Number":"STP85N","Operating Temperature":"-55°C ~ 175°C (TJ)","Rds On (Max) @ Id, Vgs":"8mOhm @ 40A, 10V","Power Dissipation (Max)":"300W (Tc)","Supplier Device Package":"TO-220","Gate Charge (Qg) (Max) @ Vgs":"110 nC @ 5 V","Drain to Source Voltage (Vdss)":"55 V","Input Capacitance (Ciss) (Max) @ Vds":"4050 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"5V, 10V","Current - Continuous Drain (Id) @ 25°C":"80A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6239","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b10dd860100990753b08fb614d737c10.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STP85NF55L/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy STP85NF55L?","answer":"The STP85NF55L is obsolete from STMicroelectronics but can be sourced through independent distribution. Submit an RFQ for current availability and pricing — quotes are confirmed at order time."},{"question":"Is STP85NF55L obsolete?","answer":"Yes, STMicroelectronics lists the STP85NF55L as obsolete. No official replacement part number has been published."},{"question":"What is the replacement for STP85NF55L?","answer":"No official replacement order code is recorded. For a pin-compatible substitute, a cross-reference search against 55 V / 80 A N-channel MOSFETs in TO-220 with similar Rds(on) and gate charge is recommended — the buyer should confirm fit with the original design's gate-drive voltage and switching frequency."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STP85NF55L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STP85NF55L 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}}