UTC UT138F/G

TRIAC

QW-R401-013,B

Figure 11.Transient Thermal Impedance

Zth j-mb,vs Pulse Width tp.

VT/V

Figure 10.Typical and Maximum

On-state Characteristic.

Figure 7.Normalised Gate Trigger Current

100

150

-50

50

0

3

1

Tj/℃

2

2.5

1.5

0.5

0

Figure 8.Normalised Latching Current

100

150

-50

50

0

3

1

Tj/℃

2

2.5

1.5

0.5

0

Figure 9.Normalised Holding Current

100

150

50

0

1000

10

Tj/℃

100

1

dV/dt(V/us)

UT138G

UT138F

off-state dV/dt limit

12

5.4

7

4.2

9.1

dlcom/dt=15A/ms

Figure 12. Typical commutation dV/dt vs junction

temperature , parameter commutation dIT/dt . The triac should

commutate when the dV/dt is below the value on the appropriate

curve for pre-commutation dIV/dt.

1.5

2

01

0.5

40

30

20

10

0

IT/A

2.5

3

typ

max

Vo=1.75V

Rs=0.316Ohms

Tj=125℃

Tj=25℃

0.1ms

10us

tp/s

1s

10

1ms

0.1

0.01

10ms

0.1s

1

unidirectional

bidirectional

tp

10s

100

150

-50

50

0

3

1

Tj/℃

2

2.5

1.5

0.5

0

T2+G+

T2+G-

T2-G-

T2-G+