{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"T2535T-8T","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"T2535T-8T","canonicalUrl":"https://icboms.com/stmicroelectronics/T2535T-8T","factsUrl":"https://icboms.com/api/mcp/products/T2535T-8T","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ECOPACK®2 T2535T-8T, Standard Triac, Single Configuration, 25 A RMS On-State, 800 V Off-State, 35 mA Gate Trigger, TO-220-3 Through Hole, -40°C to 150°C Junction.","salesMarkdown":"The STMicroelectronics T2535T-8T is a standard triac in the ECOPACK®2 series, rated for 25 A RMS on-state current and 800 V off-state voltage. It comes in a TO-220-3 through-hole package with a single triac configuration. ## 25 A RMS and 800 V — the load and margin decision The 25 A RMS on-state current is the continuous load rating. For a resistive heater or a motor drive running at 25 A RMS, this triac is sized correctly with no derating margin at full load — you will want to heatsink it properly. The 800 V off-state voltage covers 480 VAC line-to-line applications with margin, though the typical use case is 230/277 VAC where the 800 V rating absorbs the 600 V+ repetitive peak voltage seen on a noisy mains line. The non-repetitive surge current rating of 200 A at 50 Hz and 210 A at 60 Hz is the figure to check against your inrush. A 25 A resistive load has a cold-start inrush maybe 1.5x steady-state, so this is comfortable. But a bank of discharge lamps or a motor starting under load can pull 8-10x rated current for a few cycles — verify your worst-case surge stays under these numbers. The 35 mA gate trigger current and 1 V gate trigger voltage are standard sensitivity levels compatible with most optocoupler or microcontroller-driven gate drive circuits. The 35 mA holding current means the triac will stay latched once triggered as long as the load current stays above that threshold — fine for most loads, but a very light load (below 35 mA) may drop out at the zero-cross. ## Package and mounting — TO-220-3 through-hole The TO-220-3 through-hole package with the supplier device package listed as TO-220 is the standard three-lead power package. The tab is the main terminal (MT2) and is electrically live — you need an insulating pad and washer if mounting to a grounded heatsink. The package is rated for the full 25 A RMS, but thermal management is on you: the junction-to-case thermal impedance determines the heatsink size needed to stay below 150°C junction at full load. The through-hole mounting is straightforward for wave-solder or hand-solder assembly.","metaTitle":"STMicroelectronics T2535T-8T Triac, 25A 800V TO-220-3","metaDescription":"STMicroelectronics T2535T-8T standard triac, 25 A RMS on-state current, 800 V off-state voltage, TO-220-3 through-hole package. Active production.","metaKeywords":null},"attributes":{"series":"ECOPACK®2","packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"ECOPACK®2","Package":"Tube","Triac Type":"Standard","Configuration":"Single","Mounting Type":"Through Hole","Package / Case":"TO-220-3","lifecycle_stage":"eol_hot","Voltage - Off State":"800 V","Operating Temperature":"-40°C ~ 150°C (TJ)","Supplier Device Package":"TO-220","Current - Hold (Ih) (Max)":"35 mA","Current - Gate Trigger (Igt) (Max)":"35 mA","Voltage - Gate Trigger (Vgt) (Max)":"1 V","Current - On State (It (RMS)) (Max)":"25 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"200A, 210A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.66","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.66000","currency":"USD"},{"qty":10,"price":"$1.48000","currency":"USD"},{"qty":100,"price":"$1.15410","currency":"USD"},{"qty":500,"price":"$0.95342","currency":"USD"},{"qty":1000,"price":"$0.82845","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5a3f58804cd0c041f135153ea4868818.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the gate trigger current of T2535T-8T?","answer":"The maximum gate trigger current (Igt) is 35 mA, and the maximum gate trigger voltage (Vgt) is 1 V. This is a standard-sensitivity triac compatible with most optocoupler drivers and logic-level gate drive circuits."},{"question":"What is the equivalent of T2535T-8T?","answer":"There is no direct pin-compatible equivalent listed in the STMicroelectronics documentation. The T1635H-8I (16 A) and T2035H-8I (20 A) are lower-current siblings in the same ECOPACK®2 family but are not drop-in replacements for the 25 A rating. For a functional cross-reference at the same 25 A / 800 V rating, check the T2535T-8T datasheet for the full parametric table."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/T2535T-8T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/T2535T-8T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T11:01:52.129Z","lastPublished":"2026-07-16T11:01:52.129Z","indexable":true}}