{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD826T4","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD826T4","canonicalUrl":"https://icboms.com/stmicroelectronics/STD826T4","factsUrl":"https://icboms.com/api/mcp/products/STD826T4","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STD826T4, PNP bipolar power transistor, 30 V Vceo, 3 A Ic, 100 MHz transition frequency, 15 W max power, DPAK (TO-252-3) surface-mount package.","salesMarkdown":"## PNP power switch for 12–24 V rails The STMicroelectronics STD826T4 is a PNP bipolar power transistor in the DPAK (TO-252-3) surface-mount package, rated for 30 V collector-emitter breakdown and 3 A continuous collector current. Its 100 MHz transition frequency makes it suitable for moderate-speed switching applications such as load switches, relay drivers, and solenoid drivers in 12 V or 24 V systems. The 15 W power dissipation ceiling, combined with the DPAK's exposed tab, requires attention to PCB copper area and thermal vias for continuous operation near the rating. ## Vce(sat) and hFE — what they mean for drive margin The 1.1 V maximum Vce(sat) at 150 mA base drive and 3 A collector current means the transistor drops about 1.1 V when fully saturated. For a 12 V rail, that leaves roughly 10.9 V across the load — acceptable for relays and solenoids that tolerate a few volts of drop. The minimum DC current gain of 100 at 100 mA collector current and 2 V Vce gives good base-drive efficiency; a 30 mA base current can saturate a 3 A load. At lower collector currents the gain is typically higher, so the drive stage can be designed around the 100 minimum without over-specifying the base resistor. No direct factory replacement is listed on the lifecycle record. For new designs, a current-production PNP transistor in the same voltage and current class (e.g., 30–40 V, 3–5 A, DPAK) should be evaluated — parametric fit will depend on the specific drive and switching requirements.","metaTitle":"STD826T4 PNP transistor, 30 V, 3 A, 100 MHz, DPAK","metaDescription":"STD826T4 PNP bipolar transistor: 30 V Vceo, 3 A Ic, 100 MHz fT, 15 W Pd. DPAK surface-mount 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":"PNP","lifecycle_stage":"eol_hot","Base Product Number":"STD826","Operating Temperature":"150°C (TJ)","Frequency - Transition":"100MHz","Supplier Device Package":"DPAK","Vce Saturation (Max) @ Ib, Ic":"1.1V @ 150mA, 3A","Current - Collector (Ic) (Max)":"3 A","Current - Collector Cutoff (Max)":"100µA","DC Current Gain (hFE) (Min) @ Ic, Vce":"100 @ 100mA, 2V","Voltage - Collector Emitter Breakdown (Max)":"30 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d6017a0a3c49d4487bbe0cd8a57f8d70.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STD826T4/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STD826T4?","answer":"No official factory replacement is published. For new designs, select a current-production PNP transistor in the same voltage/current range (30–40 V, 3–5 A) in a DPAK package. The drive circuit may need adjustment for differences in hFE and Vce(sat)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD826T4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD826T4 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}}