{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TIP127","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TIP127","canonicalUrl":"https://icboms.com/stmicroelectronics/TIP127","factsUrl":"https://icboms.com/api/mcp/products/TIP127","rawCanonicalId":null},"summary":{"shortDescription":"PNP Darlington transistor, 100 V Vce, 5 A Ic, TO-220-3 package, 2 W power dissipation, through-hole mounting.","salesMarkdown":"## PNP Darlington in a TO-220 — what the ratings mean for your BOM The TIP127 is a PNP Darlington transistor rated for 100 V collector-emitter breakdown and 5 A continuous collector current — sized for medium-current switching and linear applications where the Darlington pair's high gain eliminates a separate driver stage. Minimum DC current gain of 1000 at 3 A collector current and 3 V Vce means the base drive requirement stays under 3 mA for a 3 A load — a logic-level signal from a 5 V microcontroller can switch it directly through a series resistor. Vce saturation is 4 V maximum at 20 mA base current and 5 A collector current — the 4 V ceiling is the voltage dropped across the collector-emitter junction when fully on, so the load sees about 96 V from a 100 V rail at full current. Maximum power dissipation is 2 W — at 5 A the Vce(sat) drop of 4 V produces 20 W instantaneous, so the transistor must be pulsed or heatsunk to stay within the 2 W continuous limit; the TO-220 tab is the primary thermal path. ## Obsolete — sourcing reality for the TIP127 Sourcing runs through independent distribution and surplus channels; quantities are lot-specific and confirmed at RFQ time. The TO-220 package is a standard footprint, so a pin-compatible replacement from another manufacturer may fit the same PCB land pattern — verify the pinout against the existing BOM position before committing. RoHS3 compliant per the lifecycle record — no additional compliance documentation (REACH, UL, IEC) is on file for this part number. ## Package and thermal handling — TO-220 through-hole Supplied in a TO-220-3 through-hole package (supplier device package TO-220) — the three-lead tabbed package mates with standard 0.100-inch pitch PCB holes and accepts a clip-on or screw-down heatsink on the metal tab. Operating junction temperature rated to 150°C — the 2 W power limit must be derated above 25°C ambient; a heatsink with adequate thermal resistance keeps the junction below the maximum during continuous operation. Packaged in Tube format — the tube protects the leads during handling and feeds into through-hole insertion equipment without reel or tape tooling.","metaTitle":"TIP127 PNP Darlington Transistor, 100V 5A TO-220, Obsolete","metaDescription":"TIP127 PNP Darlington transistor, 100V Vce, 5A Ic, 1000 hFE min at 3A. TO-220 package. Obsolete — sourced to order against RFQ. RoHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","Power - Max":"2 W","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Active","Transistor Type":"PNP - Darlington","lifecycle_stage":"eol_hot","Base Product Number":"TIP127","Operating Temperature":"150°C (TJ)","Frequency - Transition":"-","Supplier Device Package":"TO-220","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":"$0.7600","priceTiers":[{"qty":1,"price":"$0.79000","currency":"USD"},{"qty":10,"price":"$0.69900","currency":"USD"},{"qty":100,"price":"$0.53610","currency":"USD"},{"qty":500,"price":"$0.42378","currency":"USD"},{"qty":1000,"price":"$0.34982","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/716114988d8c8dfc7d5f14491223748c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TIP127/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TIP127","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TIP127 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T19:41:01.783Z","lastPublished":"2026-07-20T19:41:01.783Z","indexable":true}}