1200V 25A Snubberless™ Triac

Its 1200 V blocking voltage enables use in 3-phase industrial application. Its noise immunity and dynamic commutation makes it suitable for either inductive, capacitive or resistive load control. The T2550-12 is available in three packages: D²PAK, TO-220AB and TO-220AB insulated.

Key Features

  • On-state current: 25 A
  • Blocking voltage: 1200 V
  • High static and dynamic commutation
  • IGT = 50 mA


Technical Documentation

Product Specifications
Description Version Size
DS10039 DS10039: 1200 V 25 A Snubberless™ Triac 3.0 480 KB
Application Notes
Description Version Size
AN2986 AN2986: AC switch triggering with 3.3 V power supply 1.3 337 KB
AN4993 AN4993: How to implement a SCR or a Triac in a hybride relay application 1.1 991 KB
AN4363 AN4363: How to select the Triac, ACS, or ACST that fits your application 2.0 362 KB
AN4564 AN4564: Is a positive power supply mandatory for my application, or could a negative output work also? 1.0 384 KB
AN2703 AN2703: Parameter list for SCRs, TRIACs, AC switches, and DIACS 2.5 99 KB
AN302 AN302: Thyristors and TRIACs: holding current - an important parameter 3.3 138 KB
Technical Notes & Articles
Description Version Size
TN1173 TN1173: Packing information for IPAD™, protection, rectifiers, thyristors and AC Switches 5.0 1 MB

HW Model, CAD Libraries & SVD

HW Model, CAD Libraries & SVD
Description Version Size
Standard and Snubberless™ Triacs PSpice model (.lib) and symbols (.olb) 4.0 28 KB

Publications and Collaterals

Description Version Size
ST Thyristor Finder: SCRs and Triacs on Android and iOS 1.0 854 KB
T2550-12 Snubberless™ Triacs: 25 A, 1200 V SMD/Insulated Triacs for compact AC motor drive 1.0 1 MB
Selection Guides
Description Version Size
Thyristors, Triacs, AC switches and A.S.D™ selection guide 2.0 1 MB

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Sample & Buy

Part Number Marketing Status Quadrants Triggering gate current max (mA) (I, II, III) Triggering gate current max (mA) (I, II, III, IV) Repetitive peak off-state voltage (V) (max) Package Unit Price (US$) * Quantity Packing Type ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
T2550-12G Active I, II, III 50, 50, 50 - 1200 D2PAK 1.476 10 Tube NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
T2550-12G-TR Active I, II, III 50, 50, 50 - 1200 D2PAK 1.476 10 Tape And Reel NEC EAR99 CHINA MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
T2550-12G ActiveD2PAKIndustrialEcopack2 0 0
T2550-12G-TR ActiveD2PAKIndustrialEcopack2 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.