ST Life.augmented


1200V 25A Snubberless™ Triac
  • active Active

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.

pdf Please read
Errata Sheet
pdf Download

Key Features

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

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS10039: 1200 V 25 A Snubberless™ Triac
3.0 481 KB

Application Notes

Description Version Size
AN2703: Parameter list for SCRs, TRIACs, AC switches, and DIACS
2.5 99 KB
AN302: Thyristors and TRIACs: holding current - an important parameter
3.3 138 KB
AN4363: How to select the Triac, ACS, or ACST that fits your application
2.0 363 KB

Technical Notes & Articles

Description Version Size
TN1173: Packing information for IPAD™, protection, rectifiers, thyristors and AC Switches
3.1 333 KB

HW Model & CAD Libraries

HW Model & CAD Libraries

Description Version Size
Standard and Snubberless™ Triacs PSpice model (.lib) and symbols (.olb)
1.0 29 KB

Publications and Collaterals

Selection Guides

Description Version Size
Thyristors, Triacs, AC switches and A.S.D™ selection guide
1.0 1,717 KB

Sample & Buy

Part Number Marketing StatusQuadrantsTriggering gate current max (I, II, III) Triggering gate current max (I, II, III, IV) Repetitive peak off-state voltage (max) PackagePacking TypeOrder From STUnit Price (US$)*
@ 10
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
T2550-12TActiveI, II, III50, 50, 501200TO-220ABTube-1.448Distributor reported inventory date: 2016-02-09
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA8001000
Farnell Element14Order NowEUROPE8281

(*) 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
(**) The Material Declaration forms available on 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.
Feedback Form
Customer Feedback