{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"T2550-12G-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"T2550-12G-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/T2550-12G-TR","factsUrl":"https://icboms.com/api/mcp/products/T2550-12G-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics Snubberless™ T2550-12G-TR alternistor triac, 25 A RMS on-state current, 1.2 kV off-state voltage, single configuration, D2PAK surface-mount package, Tape & Reel.","salesMarkdown":"## 25 A RMS, 1.2 kV off-state — the load-switching envelope The T2550-12G-TR is an STMicroelectronics Snubberless™ alternistor triac rated for 25 A RMS continuous on-state current and 1.2 kV off-state voltage. That 25 A figure is the thermal limit in a 25 °C ambient with the D2PAK tab properly sinked — derate for enclosure temperature and airflow. The 1.2 kV blocking voltage covers 480 VAC line-to-line with margin for switching transients in motor-drive and power-converter circuits. Non-repetitive surge capability is 240 A at 50 Hz and 252 A at 60 Hz — this handles the inrush from a motor start or capacitor bank charge without exceeding the device's peak current rating. ## Snubberless alternistor — inductive load without the RC network The Snubberless™ alternistor structure means this triac commutates inductive loads — motors, solenoids, transformers — without the external snubber RC circuit that standard triacs require. The internal turn-off characteristic prevents false triggering from the dV/dt that an inductive load generates at zero-crossing. For a PCB layout engineer, this saves two components and the board area they occupy, and eliminates the snubber resistor's power dissipation in the enclosure. The D2PAK (TO-263-3) surface-mount package has a large exposed copper tab on the bottom — the tab is the main current path and the primary thermal path. Solder the tab to a copper pour on the PCB with thermal vias to inner-layer planes. The junction-to-case thermal resistance is low enough that a 25 A RMS load at 125°C junction requires the tab held below 100°C, which typically means a 1 oz copper pour of at least 10 cm² on a two-layer board.","metaTitle":"STMicroelectronics T2550-12G-TR Snubberless Triac, 25 A","metaDescription":"STMicroelectronics T2550-12G-TR Snubberless alternistor triac, 25 A RMS on-state, 1.2 kV off-state, D2PAK surface-mount. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"Snubberless™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"Snubberless™","Package":"Tape & Reel (TR); Cut Tape (CT)","Triac Type":"Alternistor - Snubberless","Configuration":"Single","Mounting Type":"Surface Mount","Package / Case":"TO-263-3, D²Pak (2 Leads + Tab), TO-263AB","lifecycle_stage":"eol_hot","Voltage - Off State":"1.2 kV","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"D2PAK","Current - Hold (Ih) (Max)":"60 mA","Current - Gate Trigger (Igt) (Max)":"50 mA","Voltage - Gate Trigger (Vgt) (Max)":"1.3 V","Current - On State (It (RMS)) (Max)":"25 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"240A, 252A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.2","priceTiers":[{"qty":1,"price":"$4.20000","currency":"USD"},{"qty":10,"price":"$3.77400","currency":"USD"},{"qty":100,"price":"$3.09220","currency":"USD"},{"qty":500,"price":"$2.63236","currency":"USD"},{"qty":1000,"price":"$2.61800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c0a412a5ab7e178bb6e46eddb514d906.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/T2550-12G-TR/alternatives.json"},"ai":{"faq":[{"question":"Will T2550-12G-TR drop into a board designed for T2550-12G?","answer":"Yes — the T2550-12G-TR and T2550-12G share the same die and electrical ratings (25 A RMS, 1.2 kV, Snubberless alternistor). The only difference is packaging: T2550-12G-TR is Tape & Reel for surface-mount assembly, while T2550-12G ships in a tube. The D2PAK footprint is identical; the reeled version is the pick-and-place variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/T2550-12G-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/T2550-12G-TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}