{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TIP3055","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TIP3055","canonicalUrl":"https://icboms.com/stmicroelectronics/TIP3055","factsUrl":"https://icboms.com/api/mcp/products/TIP3055","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TIP3055 NPN power transistor, TO-247-3 through-hole package, 60 V Vceo, 15 A Ic, 90 W Pd, 150°C Tj(max).","salesMarkdown":"The STMicroelectronics TIP3055 is a classic NPN silicon power transistor in the TO-247-3 through-hole package. The 3 V saturation voltage at 10 A collector current under 3.3 A base drive is a key number for thermal design — that's about 30 W of conduction loss at full rated current, which demands a substantial heatsink. The TO-247-3 package is a workhorse: three leads, a metal tab for screw-mounting to a heatsink, and it survives hot-air rework well — the leads are thick enough to take a desoldering iron without lifting a pad. STMicroelectronics no longer manufactures this part in volume. For a production BOM, this means the primary channel is closed — you're looking at the surplus and broker market to fill orders. The TO-247-3 footprint is common across many power transistors, so a pin-compatible replacement is feasible, but you'll need to compare saturation voltage, gain, and switching speed against your application's requirements. ## Sourcing reality for the TIP3055 Because this part is obsolete, standard distribution stock is depleted. We source the TIP3055 through our independent supply network — new-old-stock and surplus inventory from verified brokers. If you have a BOM line that needs filling, send us the quantity and target price; we'll pull from our multi-source channel to match it. No minimums beyond what the lot size dictates.","metaTitle":"TIP3055 NPN Power Transistor, 60 V, 15 A, 90 W TO-247-3","metaDescription":"STMicroelectronics TIP3055 NPN power transistor. 60 V Vceo, 15 A Ic, 90 W Pd in TO-247-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","Power - Max":"90 W","Mounting Type":"Through Hole","Package / Case":"TO-247-3","Product Status":"Active","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Base Product Number":"TIP3055","Operating Temperature":"150°C(TJ)","Frequency - Transition":"-","Supplier Device Package":"TO-247-3","Vce Saturation (Max) @ Ib, Ic":"3V @ 3.3A, 10A","Current - Collector (Ic) (Max)":"15 A","Current - Collector Cutoff (Max)":"700µA","DC Current Gain (hFE) (Min) @ Ic, Vce":"20 @ 4A, 4V","Voltage - Collector Emitter Breakdown (Max)":"60 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b92df7889826ed2f2a74448adae67dfe.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the TIP3055?","answer":"The TIP3055 is obsolete from STMicroelectronics. We source it through independent distribution — new-old-stock and surplus inventory. Submit an RFQ for your quantity; we'll confirm availability and current pricing at quote time."},{"question":"Is the TIP3055 obsolete?","answer":"Yes. The TIP3055 carries an Obsolete lifecycle status. STMicroelectronics no longer manufactures it in production volumes. Supply is limited to surplus and broker channels."},{"question":"Does the TIP3055 require a heat sink?","answer":"At 90 W maximum power dissipation, a heatsink is mandatory for any continuous operation above a few watts. The TO-247-3 package is designed for screw-mounting to a heatsink. Without one, the junction temperature will exceed the 150°C maximum rating at even moderate current levels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TIP3055","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TIP3055 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}}