Triode For Alternating Current (TRIAC)

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Part RoHS Manufacturer Trigger Device Type Package Style (Meter) Surface Mount Terminal Position Configuration Case Connection Maximum On-state Voltage Package Body Material Maximum DC Gate Trigger Current Non Repetitive Peak On-state Current Terminal Form Package Shape Maximum On-state Current No. of Elements Maximum Leakage Current Repetitive Peak Reverse Voltage Maximum Repetitive Peak Off-state Leakage Current No. of Terminals Sub-Category Maximum Operating Temperature Minimum Operating Temperature Terminal Finish Maximum RMS On-state Current JESD-30 Code Moisture Sensitivity Level (MSL) Maximum DC Gate Trigger Voltage Qualification Repetitive Peak Off-state Voltage Minimum Critical Rate of Rise of Commutation Voltage Minimum Critical Rate of Rise of Off-state Voltage Maximum Holding Current Additional Features JEDEC-95 Code JESD-609 Code Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Reference Standard

Q2008DH4TP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSSO-G2

2

Not Qualified

200 V

HIGH RELIABILITY

TO-252AA

e3

Q2008N4RP

Littelfuse

4 QUADRANT LOGIC LEVEL TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

8 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2008NH4RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

Matte Tin (Sn)

8 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

e3

40

260

Q2008VH3TP

Littelfuse

ALTERNISTOR TRIAC

IN-LINE

NO

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

3

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSIP-T3

2

Not Qualified

200 V

HIGH RELIABILITY

TO-251AA

e3

Q2008VH4TP

Littelfuse

ALTERNISTOR TRIAC

IN-LINE

NO

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

3

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSIP-T3

2

Not Qualified

200 V

HIGH RELIABILITY

TO-251AA

e3

Q2010N4RP

Littelfuse

4 QUADRANT LOGIC LEVEL TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

10 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2010N5RP

Littelfuse

4 QUADRANT LOGIC LEVEL TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

10 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2010NH5RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

10 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2012NH5RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

12 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2015N5RP

Littelfuse

TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

Matte Tin (Sn)

15 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

e3

40

260

Q2016NH3RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

16 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2016NH4RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

16 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2016NH6RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

16 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2025J6TP

Littelfuse

ALTERNISTOR TRIAC

FLANGE MOUNT

NO

SINGLE

SINGLE

ISOLATED

PLASTIC/EPOXY

SOLDER LUG

RECTANGULAR

1

3

125 Cel

-40 Cel

MATTE TIN

25 A

R-PSFM-D3

2

Not Qualified

200 V

HIGH RELIABILITY

e3

Q2025K6TP

Littelfuse

ALTERNISTOR TRIAC

FLANGE MOUNT

NO

SINGLE

SINGLE

ISOLATED

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

3

125 Cel

-40 Cel

MATTE TIN

25 A

R-PSFM-T3

2

Not Qualified

200 V

HIGH RELIABILITY

TO-218AC

e3

Q2025NH6RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

MATTE TIN

25 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

e3

40

260

Q2025NH6TP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

2

125 Cel

-40 Cel

25 A

R-PSSO-G2

Not Qualified

200 V

HIGH RELIABILITY

TO-263AB

NOT SPECIFIED

NOT SPECIFIED

Q2040J7TP

Littelfuse

ALTERNISTOR TRIAC

FLANGE MOUNT

NO

SINGLE

SINGLE

ISOLATED

PLASTIC/EPOXY

SOLDER LUG

RECTANGULAR

1

3

125 Cel

-40 Cel

MATTE TIN

40 A

R-PSFM-D3

2

Not Qualified

200 V

HIGH RELIABILITY

e3

Q2040K7TP

Littelfuse

ALTERNISTOR TRIAC

FLANGE MOUNT

NO

SINGLE

SINGLE

ISOLATED

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

3

125 Cel

-40 Cel

MATTE TIN

40 A

R-PSFM-T3

2

Not Qualified

200 V

HIGH RELIABILITY

TO-218AC

e3

Q4004D3TP

Littelfuse

TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

1.6 V

PLASTIC/EPOXY

10 mA

GULL WING

RECTANGULAR

1

2 mA

400 V

2000 uA

2

125 Cel

-40 Cel

MATTE TIN

4 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

40 V/us

20 mA

TO-252AA

e3

40

260

UL RECOGNIZED

Q4004D4RP

Littelfuse

TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

1.6 V

PLASTIC/EPOXY

25 mA

GULL WING

RECTANGULAR

1

2 mA

400 V

2000 uA

2

125 Cel

-40 Cel

MATTE TIN

4 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

75 V/us

30 mA

TO-252AA

e3

40

260

UL RECOGNIZED

Q4004D4TP

Littelfuse

TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

1.6 V

PLASTIC/EPOXY

25 mA

GULL WING

RECTANGULAR

1

2 mA

400 V

2000 uA

2

125 Cel

-40 Cel

MATTE TIN

4 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

75 V/us

30 mA

TO-252AA

e3

40

260

UL RECOGNIZED

Q4004L4TP

Littelfuse

TRIAC

FLANGE MOUNT

NO

SINGLE

SINGLE

ISOLATED

1.6 V

PLASTIC/EPOXY

25 mA

THROUGH-HOLE

RECTANGULAR

1

2 mA

400 V

2000 uA

3

125 Cel

-40 Cel

MATTE TIN

4 A

R-PSFM-T3

2

1.3 V

Not Qualified

400 V

75 V/us

30 mA

TO-220AB

e3

10

260

UL RECOGNIZED

Q4004V3TP

Littelfuse

TRIAC

IN-LINE

NO

SINGLE

SINGLE

MAIN TERMINAL 2

1.6 V

PLASTIC/EPOXY

10 mA

THROUGH-HOLE

RECTANGULAR

1

2 mA

400 V

2000 uA

3

125 Cel

-40 Cel

MATTE TIN

4 A

R-PSIP-T3

1.3 V

Not Qualified

400 V

40 V/us

20 mA

TO-251AA

e3

40

260

UL RECOGNIZED

Q4006DH3RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

10 mA

GULL WING

RECTANGULAR

1

3 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSSO-G2

2

1.3 V

Not Qualified

600 V

20 V/us

75 V/us

15 mA

HIGH RELIABILITY

TO-252AA

e3

40

260

Q4006DH3TP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

10 mA

GULL WING

RECTANGULAR

1

3 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSSO-G2

2

1.3 V

Not Qualified

600 V

20 V/us

75 V/us

15 mA

HIGH RELIABILITY

TO-252AA

e3

40

260

Q4006DH4RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

GULL WING

RECTANGULAR

1

3 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSSO-G2

2

1.3 V

Not Qualified

600 V

25 V/us

400 V/us

35 mA

HIGH RELIABILITY

TO-252AA

e3

40

260

Q4006DH4TP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

GULL WING

RECTANGULAR

1

3 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSSO-G2

2

1.3 V

Not Qualified

600 V

25 V/us

400 V/us

35 mA

HIGH RELIABILITY

TO-252AA

e3

40

260

Q4006LH4TP

Littelfuse

ALTERNISTOR TRIAC

FLANGE MOUNT

NO

SINGLE

SINGLE

ISOLATED

PLASTIC/EPOXY

35 mA

THROUGH-HOLE

RECTANGULAR

1

3 mA

3

TRIACs

125 Cel

-40 Cel

Matte Tin (Sn)

6 A

R-PSFM-T3

2

1.3 V

Not Qualified

600 V

25 V/us

450 V/us

35 mA

TO-220AB

e3

10

260

UL RECOGNIZED

Q4006LTHTP

Littelfuse

TRIAC WITH INT TRIGGER

FLANGE MOUNT

NO

SINGLE

SINGLE WITH BUILT-IN TRIGGER ELEMENT IN SERIES WITH GATE

ISOLATED

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

2 mA

3

TRIACs

125 Cel

-40 Cel

Matte Tin (Sn)

6 A

R-PSFM-T3

2

Not Qualified

400 V

25 V/us

450 V/us

50 mA

HIGH RELIABILITY

TO-220AB

e3

40

260

Q4006LTTP

Littelfuse

TRIAC WITH INT TRIGGER

FLANGE MOUNT

NO

SINGLE

SINGLE WITH BUILT-IN TRIGGER ELEMENT IN SERIES WITH GATE

ISOLATED

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

2 mA

3

TRIACs

125 Cel

-40 Cel

Matte Tin (Sn)

6 A

R-PSFM-T3

2

Not Qualified

400 V

4 V/us

100 V/us

50 mA

HIGH RELIABILITY

TO-220AB

e3

40

260

Q4006N4RP

Littelfuse

TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

25 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

120 V/us

50 mA

HIGH RELIABILITY

TO-263AB

e3

40

260

Q4006N4TP

Littelfuse

TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

25 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

120 V/us

50 mA

HIGH RELIABILITY

TO-263AB

e3

40

260

Q4006NH4RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

GULL WING

RECTANGULAR

1

3 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSSO-G2

1.3 V

Not Qualified

600 V

25 V/us

450 V/us

35 mA

HIGH RELIABILITY

TO-263AB

e3

40

260

Q4006NH4TP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

GULL WING

RECTANGULAR

1

3 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSSO-G2

1.3 V

Not Qualified

600 V

25 V/us

450 V/us

35 mA

HIGH RELIABILITY

TO-263AB

e3

40

260

Q4006R4TP

Littelfuse

TRIAC

FLANGE MOUNT

NO

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

25 mA

THROUGH-HOLE

RECTANGULAR

1

2 mA

3

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSFM-T3

1.3 V

Not Qualified

400 V

50 mA

HIGH RELIABILITY

TO-220AB

e3

40

260

Q4006RH4TP

Littelfuse

ALTERNISTOR TRIAC

FLANGE MOUNT

NO

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

THROUGH-HOLE

RECTANGULAR

1

3 mA

3

TRIACs

125 Cel

-40 Cel

Matte Tin (Sn)

6 A

R-PSFM-T3

1.3 V

Not Qualified

600 V

25 V/us

450 V/us

35 mA

HIGH RELIABILITY

TO-220AB

e3

40

260

Q4006VH3TP

Littelfuse

ALTERNISTOR TRIAC

IN-LINE

NO

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

10 mA

THROUGH-HOLE

RECTANGULAR

1

3 mA

3

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSIP-T3

2

1.3 V

Not Qualified

600 V

20 V/us

75 V/us

15 mA

HIGH RELIABILITY

TO-251AA

e3

40

260

Q4006VH4TP

Littelfuse

ALTERNISTOR TRIAC

IN-LINE

NO

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

THROUGH-HOLE

RECTANGULAR

1

3 mA

3

TRIACs

125 Cel

-40 Cel

MATTE TIN

6 A

R-PSIP-T3

2

1.3 V

Not Qualified

600 V

25 V/us

400 V/us

35 mA

HIGH RELIABILITY

TO-251AA

e3

40

260

Q4008DH3RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

10 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSSO-G2

2

1.3 V

Not Qualified

400 V

20 V/us

75 V/us

15 mA

HIGH RELIABILITY

TO-252AA

e3

40

260

Q4008DH4RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSSO-G2

2

1.3 V

Not Qualified

400 V

25 V/us

450 V/us

35 mA

HIGH RELIABILITY

TO-252AA

e3

40

260

Q4008DH4TP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSSO-G2

2

1.3 V

Not Qualified

400 V

25 V/us

450 V/us

35 mA

HIGH RELIABILITY

TO-252AA

e3

40

260

Q4008LTHTP

Littelfuse

TRIAC WITH INT TRIGGER

FLANGE MOUNT

NO

SINGLE

SINGLE WITH BUILT-IN TRIGGER ELEMENT IN SERIES WITH GATE

ISOLATED

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

2 mA

3

TRIACs

125 Cel

-40 Cel

Matte Tin (Sn)

8 A

R-PSFM-T3

2

Not Qualified

400 V

25 V/us

450 V/us

50 mA

HIGH RELIABILITY

TO-220AB

e3

40

260

Q4008LTTP

Littelfuse

TRIAC WITH INT TRIGGER

FLANGE MOUNT

NO

SINGLE

SINGLE WITH BUILT-IN TRIGGER ELEMENT IN SERIES WITH GATE

ISOLATED

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

2 mA

3

TRIACs

125 Cel

-40 Cel

Matte Tin (Sn)

8 A

R-PSFM-T3

2

Not Qualified

400 V

4 V/us

120 V/us

60 mA

HIGH RELIABILITY

TO-220AB

e3

40

260

Q4008N4RP

Littelfuse

4 QUADRANT LOGIC LEVEL TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

25 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

150 V/us

50 mA

HIGH RELIABILITY

TO-263AB

e3

40

260

Q4008N4TP

Littelfuse

TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

25 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

150 V/us

50 mA

HIGH RELIABILITY

TO-263AB

e3

40

260

Q4008NH4RP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

25 V/us

400 V/us

35 mA

HIGH RELIABILITY

TO-263AB

e3

40

260

Q4008NH4TP

Littelfuse

ALTERNISTOR TRIAC

SMALL OUTLINE

YES

SINGLE

SINGLE

MAIN TERMINAL 2

PLASTIC/EPOXY

35 mA

GULL WING

RECTANGULAR

1

2 mA

2

TRIACs

125 Cel

-40 Cel

MATTE TIN

8 A

R-PSSO-G2

1.3 V

Not Qualified

400 V

25 V/us

400 V/us

35 mA

HIGH RELIABILITY

TO-263AB

e3

40

260

Triode For Alternating Current (TRIAC)

A Triode for Alternating Current (TRIAC) is a semiconductor device that is used to control the flow of electrical current in AC circuits. It is a bidirectional device that can conduct current in both directions, making it useful for AC power control applications.

TRIACs consist of a bidirectional switching element that allows for the control of AC current in both directions. They are typically used in applications where AC voltage needs to be controlled, such as in lighting control, motor speed control, and power supplies.

TRIACs work by applying a small current or voltage to the gate terminal, which allows current to flow through the device. Once the current reaches a certain level, the TRIAC turns on and conducts current in both directions until the current drops below a certain threshold, at which point the TRIAC turns off.

TRIACs are commonly used in conjunction with other components such as capacitors, inductors, and diodes to form complete electronic circuits. They are often used in power control circuits that require precise control of AC voltage or current.