{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TIP122FP","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TIP122FP","canonicalUrl":"https://icboms.com/stmicroelectronics/TIP122FP","factsUrl":"https://icboms.com/api/mcp/products/TIP122FP","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TIP122FP NPN Darlington transistor, 100 V Vce, 5 A Ic, 1000 min hFE at 3 A, TO-220-3 Full Pack, 2 W, 150°C TJ.","salesMarkdown":"## Obsolete — plan your BOM move now The STMicroelectronics TIP122FP is an NPN Darlington transistor in the TO-220-3 Full Pack (TO-220FP) package, rated for 100 V collector-emitter breakdown and 5 A continuous collector current. It offers a minimum DC current gain of 1000 at 3 A collector current and 3 V Vce, with a saturation voltage of 4 V max at 20 mA base drive and 5 A collector current. The junction temperature limit is 150°C, and the package dissipates up to 2 W. This part is officially listed as Obsolete by STMicroelectronics. The 100 V Vce(max) and 5 A Ic(max) define the safe operating area for switching inductive loads like relays, solenoids, motors, and lamp drivers. The 4 V saturation voltage at 5 A means the on-state power dissipation is significant — at full current, expect roughly 20 W of conduction loss, which exceeds the 2 W package limit. In practice, this part is used for medium-current switching with adequate heatsinking or pulsed duty cycles where average dissipation stays under 2 W. The minimum hFE of 1000 at 3 A means a microcontroller pin can drive it directly through a series base resistor — a 5 V logic output sourcing 5 mA can switch up to 5 A of collector current. That high gain is the Darlington pair's advantage over a single BJT. ## TO-220FP full-pack — no heatsink tab isolation worries The TO-220-3 Full Pack (TO-220FP) is a fully isolated package — the metal tab is encapsulated, so no insulating washer or pad is needed when bolting it to a chassis or heatsink. The 2 W power rating is for the package without an external heatsink; with a proper heatsink and thermal compound, the effective dissipation can increase, but the junction temperature must stay under 150°C. The through-hole mounting suits point-to-point wiring, perfboard, or PCB layouts with 0.1-inch pitch.","metaTitle":"TIP122FP NPN Darlington Transistor, 100 V, 5 A, TO-220FP","metaDescription":"STMicroelectronics TIP122FP NPN Darlington transistor. 100 V Vce, 5 A Ic, 1000 min hFE, TO-220-3 Full Pack. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","Power - Max":"2 W","Mounting Type":"Through Hole","Package / Case":"TO-220-3 Full Pack","Product Status":"Obsolete","Transistor Type":"NPN - Darlington","lifecycle_stage":"eol_hot","Base Product Number":"TIP122","Operating Temperature":"150°C (TJ)","Frequency - Transition":"-","Supplier Device Package":"TO-220FP","Vce Saturation (Max) @ Ib, Ic":"4V @ 20mA, 5A","Current - Collector (Ic) (Max)":"5 A","Current - Collector Cutoff (Max)":"500µA","DC Current Gain (hFE) (Min) @ Ic, Vce":"1000 @ 3A, 3V","Voltage - Collector Emitter Breakdown (Max)":"100 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/548c392dd3e786d191d50504fb962597.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent of TIP122FP?","answer":"The closest pin-compatible alternative is the standard TIP122 in the TO-220-3 package. The TIP122 has the same electrical ratings (100 V, 5 A, 1000 hFE) but uses a non-isolated TO-220 package, so you will need an insulating washer and thermal compound if mounting to a heatsink. The TIP122FP's full-pack isolation is the key difference — the TIP122 lacks that, so a direct swap requires checking the mounting and isolation scheme."},{"question":"Can TIP122 be used as a replacement for TIP122FP?","answer":"Yes, electrically the TIP122 is a direct replacement — same 100 V Vce, 5 A Ic, and 1000 min hFE. The difference is the package: the TIP122 is a standard TO-220 with a conductive metal tab, while the TIP122FP is a TO-220 Full Pack with an isolated tab. If your design relies on the full-pack isolation (e.g., bolted directly to a chassis without a washer), the TIP122 will require an insulating kit. If the mounting is already isolated, the TIP122 works as a drop-in."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TIP122FP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TIP122FP 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}}