{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF18N55M5","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF18N55M5","canonicalUrl":"https://icboms.com/stmicroelectronics/STF18N55M5","factsUrl":"https://icboms.com/api/mcp/products/STF18N55M5","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics MDmesh™ V N-channel MOSFET, 550 V drain-source voltage, 16 A continuous drain current, 192 mOhm Rds(on) at 10 V gate drive, TO-220FP through-hole full-pack package.","salesMarkdown":"## 550 V, 16 A N-channel MOSFET in TO-220FP full pack The maximum gate threshold voltage is 5 V at 250 µA drain current, so a 10 V gate signal comfortably overdrives the channel into full enhancement. Gate charge is 31 nC at 10 V — a moderate figure that keeps the gate-drive energy requirement manageable for a standard bootstrap or isolated driver topology. STMicroelectronics lists the STF18N55M5 as obsolete. The TO-220FP package and 550 V / 16 A rating are common enough that a pin-compatible replacement from the same or another manufacturer may exist, but no official cross-reference is provided here. ## Input capacitance and switching speed Input capacitance (Ciss) is 1260 pF maximum at 100 V drain-source bias. This is a moderate value that keeps the gate-drive switching losses in check for hard-switched topologies up to around 100 kHz. The 550 V rating gives plenty of headroom for universal-input power factor correction stages and for DC bus switching in intermediate-bus converters.","metaTitle":"STF18N55M5 N-Channel MOSFET, 550 V, 16 A, MDmesh V","metaDescription":"STF18N55M5 N-channel MOSFET from STMicroelectronics MDmesh V series. 550 Vdss, 16 A continuous drain, 192 mOhm Rds(on).","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"MDmesh™ V","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±25V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Through Hole","Package / Case":"TO-220-3 Full Pack","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"5V @ 250µA","Base Product Number":"STF18","Operating Temperature":"150°C (TJ)","Rds On (Max) @ Id, Vgs":"192mOhm @ 8A, 10V","Power Dissipation (Max)":"25W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"31 nC @ 10 V","Drain to Source Voltage (Vdss)":"550 V","Input Capacitance (Ciss) (Max) @ Vds":"1260 pF @ 100 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"16A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.2400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b67c300a061ffac5ca619f6658fd7d06.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the STF18N55M5 obsolete?","answer":"Yes, STMicroelectronics lists the STF18N55M5 as obsolete. It is no longer in production, so new orders are fulfilled from surplus and new-old-stock inventory through independent distribution."},{"question":"Can the STF18N55M5 be used in switching power supplies?","answer":"Yes, the 550 V drain-source voltage and 16 A continuous current rating make it suitable for switching power supply applications such as offline flyback converters, PFC stages, and DC-DC converters where the drain voltage stays within the 550 V maximum. The 31 nC gate charge and 1260 pF input capacitance support switching frequencies common in these designs."},{"question":"What is the replacement for the STF18N55M5?","answer":"STMicroelectronics has not published an official successor for the STF18N55M5. For new designs, consider current-production MDmesh V or MDmesh M6 series N-channel MOSFETs in TO-220FP with similar voltage and current ratings. For existing BOMs, we can source surplus inventory of the STF18N55M5 against an RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF18N55M5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF18N55M5 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}}