{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD1805T4","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD1805T4","canonicalUrl":"https://icboms.com/stmicroelectronics/STD1805T4","factsUrl":"https://icboms.com/api/mcp/products/STD1805T4","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STD1805T4 NPN transistor, 60 V Vce, 5 A Ic, 15 W max, 150 MHz fT, DPAK (TO-252-3) surface-mount package, 150°C junction temperature.","salesMarkdown":"The STMicroelectronics STD1805T4 is an NPN bipolar power transistor in a DPAK (TO-252-3) surface-mount package, rated for 60 V collector-emitter breakdown and 5 A continuous collector current. It handles up to 15 W of power dissipation and transitions at 150 MHz, making it a general-purpose switching and linear amplifier device for medium-power DC-DC converters, linear regulators, relay drivers, and motor control circuits in industrial and automotive auxiliary loads. The 60 V Vce breakdown and 5 A Ic rating define the safe operating area for a substitute. The 600 mV Vce saturation at 200 mA base current and 5 A collector current is typical for a 5 A NPN in DPAK — a replacement with lower Vce(sat) improves efficiency in switching applications. The DC current gain of 200 minimum at 100 mA, 2 V is generous, so a substitute with hFE in the 100–300 range at similar bias will work without redesigning the base drive. The 100 nA collector cutoff ensures low leakage in off-state, important for battery-powered or high-impedance loads. ## Package and footprint note The DPAK (TO-252-3) footprint is standard — two leads plus a tab that is the collector. Any pin-compatible NPN in the same package will drop in without board changes.","metaTitle":"STD1805T4 NPN Transistor, 60V 5A DPAK – Obsolete","metaDescription":"STD1805T4 NPN transistor: 60V Vce, 5A Ic, 15W max, 150MHz fT, DPAK package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"15 W","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Obsolete","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Base Product Number":"STD18","Operating Temperature":"150°C(TJ)","Frequency - Transition":"150MHz","Supplier Device Package":"DPAK","Vce Saturation (Max) @ Ib, Ic":"600mV @ 200mA, 5A","Current - Collector (Ic) (Max)":"5 A","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"200 @ 100mA, 2V","Voltage - Collector Emitter Breakdown (Max)":"60 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/03ce6fcb0b02a8a3cb1f99623554b85c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STD1805T4/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STD1805T4?","answer":"The evidence does not list an official STMicroelectronics replacement part number. A functionally equivalent NPN transistor in DPAK with 60 V Vce, 5 A Ic, and similar hFE is needed. Parts like the STD1802T4 or other ST NPNs in the same package may be candidates, but you should verify Vce(sat), hFE, and fT against your circuit. Sourcing the STD1805T4 through independent distribution remains an option for existing BOMs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD1805T4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD1805T4 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}}