{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD18N55M5","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD18N55M5","canonicalUrl":"https://icboms.com/stmicroelectronics/STD18N55M5","factsUrl":"https://icboms.com/api/mcp/products/STD18N55M5","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics MDmesh™ V series, STD18N55M5, N-Channel MOSFET, 550V Vdss, 16A Id, 192mOhm Rds(on) at 10V, 31nC Qg, DPAK surface-mount, 150°C Tj.","salesMarkdown":"## 550 V, 16 A — the switching envelope The STD18N55M5 is an N-channel 550 V, 16 A MOSFET from STMicroelectronics' MDmesh™ V series, built for hard-switching topologies in power supplies, adapters, and lighting ballasts. Maximum on-resistance is 192 mOhm at 8 A drain current with 10 V gate drive — the conduction loss floor for a 2–4 A RMS load in a typical LLC or flyback primary switch. Input capacitance is 1260 pF at 100 V Vds, which sets the driver's dynamic current draw and the switching energy per cycle. ## DPAK footprint and thermal layout The TO-252-3 (DPAK) package with a single exposed drain tab requires a minimum 300–400 mm² copper area on the top layer for the 110 W dissipation to be achievable. The 10 V gate drive voltage is mandatory to reach the rated Rds(on); driving with 5 V logic leaves the FET in the linear region and risks thermal runaway. ROHS3 compliant, with ±25 V maximum gate-source voltage and a 5 V threshold at 250 µA. The MDmesh™ V series is ST's mainstream high-voltage MOSFET platform; no official second-source cross-reference is published, but the 550 V / 16 A DPAK space has multiple contenders from Infineon, ON Semi, and Vishay for dual-sourcing qualification.","metaTitle":"STD18N55M5 N-Channel 550V 16A MOSFET, MDmesh V, DPAK","metaDescription":"STD18N55M5 N-channel 550V 16A MOSFET from STMicroelectronics MDmesh V series. 192 mOhm Rds(on) at 10V, 31 nC gate charge, DPAK.","metaKeywords":null},"attributes":{"series":"MDmesh™ V","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"MDmesh™ V","Package":"Tape & Reel (TR) Cut Tape (CT)","FET Type":"N-Channel","Vgs (Max)":"±25V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Active","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"5V @ 250µA","Base Product Number":"STD18","Operating Temperature":"150°C (TJ)","Rds On (Max) @ Id, Vgs":"192mOhm @ 8A, 10V","Power Dissipation (Max)":"110W (Tc)","Supplier Device Package":"DPAK","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":"$2.9600","priceTiers":[{"qty":1,"price":"$2.96000","currency":"USD"},{"qty":10,"price":"$2.48800","currency":"USD"},{"qty":100,"price":"$2.01290","currency":"USD"},{"qty":500,"price":"$1.78924","currency":"USD"},{"qty":1000,"price":"$1.53203","currency":"USD"},{"qty":2500,"price":"$1.44257","currency":"USD"},{"qty":5000,"price":"$1.38400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5603a70307cdcb17df7c9b76a94ff30f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STD18N55M5/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between STD18N55M5 and STP18N55M5?","answer":"The STP18N55M5 is the TO-220 through-hole variant of the same MDmesh™ V die. The STD18N55M5 is the DPAK surface-mount version. Electrical ratings — 550 V Vdss, 16 A Id, 192 mOhm Rds(on) — are identical. The choice is purely package-driven: DPAK for automated SMT assembly, TO-220 for through-hole or heatsink mounting."},{"question":"Is STD18N55M5 RoHS compliant?","answer":"Yes, the STD18N55M5 is listed as ROHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD18N55M5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD18N55M5 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}}