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



Description Version Size
DS10039 DS10039: 1200 V 25 A Snubberless™ Triac 3.0 480 KB
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


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
Description Version Size
Thyristors, Triacs, AC switches and A.S.D™ selection guide 2.0 1 MB


Software Development Tools
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型号 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
T2550-12T Active I, II, III 50, 50, 50 - 1200 TO-220AB 1.448 10 Tube NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY

(*) 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


型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
T2550-12T ActiveTO-220ABIndustrialEcopack2

(**) 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.