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  • Available either in through-hole and surface-mount packages, these devices are suitable for general purpose AC switching. They can be used as an ON/OFF function in applications such as static relays, heating regulation, induction motor starting circuits or for phase control operation in light dimmers and motor speed controllers, etc.

    The Snubberless versions (BTA, BTB08_xxxxW and T8 series) are specially recommended for use on inductive loads, thanks to their high commutation performance.
    Logic level versions are designed to interface directly with low power drivers such as Microcontrollers.
    By using an internal ceramic pad, the BTA series provide voltage insulated tab (rated at 2500 VRMS) in compliance with UL standards (file ref.: E81734).

    Key Features

    • On-state rms current, IT(RMS) 8 A
    • Repetitive peak off-state voltage, VDRM / VRRM 600 V to 800 V
    • Triggering gate current, IGT 5 to 50 mA

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS2114
      Snubberless™, logic level and standard 8 A Triacs
      15.0
      296.08 KB
      PDF
      DS2114

      Snubberless™, logic level and standard 8 A Triacs

    • Description Version Size Action
      AN2986
      AC switch triggering with 3.3 V power supply
      1.4
      338 KB
      PDF
      AN4993
      How to implement a SCR or a Triac in a hybride relay application
      1.1
      991.71 KB
      PDF
      AN4363
      How to select the Triac, ACS, or ACST that fits your application
      2.1
      361.44 KB
      PDF
      AN4564
      Is a positive power supply mandatory for my application, or could a negative output work also?
      1.0
      384.04 KB
      PDF
      AN2703
      Parameter list for SCRs, TRIACs, AC switches, and DIACS
      2.6
      98.99 KB
      PDF
      AN302
      Thyristors and TRIACs: holding current - an important parameter
      3.5
      138.63 KB
      PDF
      AN2986

      AC switch triggering with 3.3 V power supply

      AN4993

      How to implement a SCR or a Triac in a hybride relay application

      AN4363

      How to select the Triac, ACS, or ACST that fits your application

      AN4564

      Is a positive power supply mandatory for my application, or could a negative output work also?

      AN2703

      Parameter list for SCRs, TRIACs, AC switches, and DIACS

      AN302

      Thyristors and TRIACs: holding current - an important parameter

    • Description Version Size Action
      TN1173
      Packing information for IPAD, protection, rectifiers, thyristors and AC Switches
      7.0
      433.12 KB
      PDF
      TN1173

      Packing information for IPAD, protection, rectifiers, thyristors and AC Switches

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      Standard and Snubberless™ Triacs PSpice model (.lib) and symbols (.olb) 5.1
      30.62 KB
      ZIP

      Standard and Snubberless™ Triacs PSpice model (.lib) and symbols (.olb)

Publications and Collaterals

    • Description Version Size Action
      ST Thyristor Finder: SCRs and Triacs on Android and iOS 1.0
      854.07 KB
      PDF

      ST Thyristor Finder: SCRs and Triacs on Android and iOS

    • Description Version Size Action
      Thyristors, Triacs, AC switches and A.S.D™ selection guide 2.0
      1.51 MB
      PDF

      Thyristors, Triacs, AC switches and A.S.D™ selection guide

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
T850-6G
Active
D2PAK Industrial Ecopack2
T850-6G-TR
Active
D2PAK Industrial Ecopack2
T850-8G
Active
D2PAK Industrial Ecopack2
T850-8G-TR
Active
D2PAK Industrial Ecopack2

T850-6G

Package:

D2PAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

T850-6G-TR

Package:

D2PAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

T850-8G

Package:

D2PAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

T850-8G-TR

Package:

D2PAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Quadrants
Budgetary Price (US$)*/Qty
More info
min
max
T850-6G-TR Available at 1 distributors

Distributor availability ofT850-6G-TR

Distributor Name
Region Stock Min. Order Third party link
RUTRONIK EUROPE 3000 1000 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

RUTRONIK

Stock

3000

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-09

Buy now
Active
EAR99 NEC Tape And Reel D2PAK - - I, II, III
MORE INFO

Triggering gate current max (mA) (I, II, III):

50, 50, 50

Triggering gate current max (mA) (I, II, III, IV):

-

Repetitive peak off-state voltage (V) (max):

600

Unit Price (US$):

-

Country of Origin:

CHINA

T850-8G No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tube D2PAK - - I, II, III
MORE INFO

Triggering gate current max (mA) (I, II, III):

50, 50, 50

Triggering gate current max (mA) (I, II, III, IV):

-

Repetitive peak off-state voltage (V) (max):

800

Unit Price (US$):

-

Country of Origin:

CHINA

T850-8G-TR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel D2PAK - - I, II, III
MORE INFO

Triggering gate current max (mA) (I, II, III):

50, 50, 50

Triggering gate current max (mA) (I, II, III, IV):

-

Repetitive peak off-state voltage (V) (max):

800

Unit Price (US$):

-

Country of Origin:

CHINA

T850-6G Available at 1 distributors

Distributor availability ofT850-6G

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1980 1 Order Now

Distributor reported inventory date: 2020-08-08

Distributor Name

DIGIKEY

Stock

1980

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-08

Buy now
Active
EAR99 NEC Tube D2PAK - - I, II, III
MORE INFO

Triggering gate current max (mA) (I, II, III):

50, 50, 50

Triggering gate current max (mA) (I, II, III, IV):

-

Repetitive peak off-state voltage (V) (max):

600

Unit Price (US$):

-

Country of Origin:

CHINA

T850-6G-TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofT850-6G-TR

Distributor Name
Region Stock Min. Order Third party link
RUTRONIK EUROPE 3000 1000 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

RUTRONIK

Stock

3000

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-09

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

D2PAK

Operating Temperature (°C)

(min)

-

(max)

-

Quadrants

I, II, III

Triggering gate current max (mA) (I, II, III)

50, 50, 50

Triggering gate current max (mA) (I, II, III, IV)

-

Repetitive peak off-state voltage (V) (max)

600

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

T850-8G

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tube

Package

D2PAK

Operating Temperature (°C)

(min)

-

(max)

-

Quadrants

I, II, III

Triggering gate current max (mA) (I, II, III)

50, 50, 50

Triggering gate current max (mA) (I, II, III, IV)

-

Repetitive peak off-state voltage (V) (max)

800

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

T850-8G-TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

D2PAK

Operating Temperature (°C)

(min)

-

(max)

-

Quadrants

I, II, III

Triggering gate current max (mA) (I, II, III)

50, 50, 50

Triggering gate current max (mA) (I, II, III, IV)

-

Repetitive peak off-state voltage (V) (max)

800

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

T850-6G

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofT850-6G

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1980 1 Order Now

Distributor reported inventory date: 2020-08-08

Distributor Name

DIGIKEY

Stock

1980

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-08

ECCN (EU)

NEC

Packing Type

Tube

Package

D2PAK

Operating Temperature (°C)

(min)

-

(max)

-

Quadrants

I, II, III

Triggering gate current max (mA) (I, II, III)

50, 50, 50

Triggering gate current max (mA) (I, II, III, IV)

-

Repetitive peak off-state voltage (V) (max)

600

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

(*) 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