{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"T2550-12T","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"T2550-12T","canonicalUrl":"https://icboms.com/stmicroelectronics/T2550-12T","factsUrl":"https://icboms.com/api/mcp/products/T2550-12T","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics Snubberless™ series, Triac Alternistor - Snubberless, Single, Through Hole, TO-220-3, 1.2 kV off-state, 25 A RMS on-state, 240A/252A surge, -40°C to 125°C.","salesMarkdown":"## 1.2 kV blocking voltage, 25 A RMS — high-line industrial AC switching The STMicroelectronics T2550-12T is a Snubberless™ alternistor triac rated for 1.2 kV off-state voltage and 25 A RMS on-state current in a TO-220-3 through-hole package. Designed for high-line AC switching in industrial heaters, motor drives, and power supplies where snubber circuits are undesirable, the Snubberless™ construction provides commutating dV/dt immunity without external RC networks. Single-device configuration with a 50 mA maximum gate trigger current and 1.3 V maximum gate trigger voltage keeps the drive circuit simple — a standard microcontroller I/O through a resistor can fire it. ## Surge handling and inductive loads Non-repetitive surge current is rated 240 A at 50 Hz and 252 A at 60 Hz, which covers the inrush from large motor starts or transformer energisation. The 60 mA maximum hold current means the triac stays latched through the zero-cross of an inductive load without premature dropout — a key spec for motor or solenoid control where the current waveform lags voltage. For a BOM line needing 1.2 kV blocking voltage in a TO-220 footprint, this is a current-production choice with no LTB risk.","metaTitle":"STMicroelectronics T2550-12T Snubberless™ Triac","metaDescription":"T2550-12T Alternistor triac from STMicroelectronics: 1.2 kV off-state, 25 A RMS, 240A surge. 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":"Tube","Triac Type":"Alternistor - Snubberless","Configuration":"Single","Mounting Type":"Through Hole","Package / Case":"TO-220-3","lifecycle_stage":"eol_hot","Voltage - Off State":"1.2 kV","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"TO-220","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":"$3.63","priceTiers":[{"qty":1,"price":"$3.81000","currency":"USD"},{"qty":10,"price":"$3.42100","currency":"USD"},{"qty":100,"price":"$2.80310","currency":"USD"},{"qty":500,"price":"$2.38620","currency":"USD"},{"qty":1000,"price":"$2.37318","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c0a412a5ab7e178bb6e46eddb514d906.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/T2550-12T/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum surge current for T2550-12T?","answer":"The non-repetitive surge current rating is 240 A at 50 Hz and 252 A at 60 Hz (Itsm). This covers the inrush from motor starts, transformer energisation, and capacitive loads."},{"question":"Can the T2550-12T handle inductive loads like motors or transformers?","answer":"Yes. The Snubberless™ alternistor design provides commutating dV/dt immunity without external snubber networks, and the 60 mA hold current keeps the device latched through the zero-cross of inductive load current. The 240 A / 252 A surge rating handles motor-start inrush."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/T2550-12T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/T2550-12T 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}}