339

©2008 Littelfuse, Inc.

Revised: July 9, 2008

Specifications are subject to change without notice.

Please refer to http://www.littelfuse.com for current information.

339

©2008 Littelfuse, Inc.

Specifications are subject to change without notice.

Please refer to http://www.littelfuse.com for current information.

HTxxx & HTMxxx & STxxx Series

Standard Bidirectional DIAC Trigger

Figure 1: V-I Characteristics

Figure 2: Typical DIAC/Triac Full-wave Phase Control

Circuit

120 V ac

60 Hz

Resistive Load

3.3 k

200 k

0.1 μF

100 V

Diac

Triac

MT2

MT1

G

Figure 3: Repetitive Peak On-state Current vs. Pulse Duration

12

4

0

0

0

0

1

0

0

0

4

0

0

0

2

0

0

0

1

0

0

4

0

0

2

6

.001

.002

.003

.005

0.1

0.2

0.3

3.0

0.5

5.0

.01

0.02

0.03

0.05

1.0

10

2.0

Base Pulse Duration – μs

Safe Operating

Area

10

20

40 60 100

PULSE REPETITION RATE = 120 pps

T

HT-60

HTM-32B

HT-32x, -34x, -35, -36x, -40

HT-5761, -5761A, -5762

ST-32x, -34x, -35, -36x, -40

Figure 4: Normalized V

vs. Junction Temperature

-8%

-6%

-4%

-2%

0%

2%

4%

6%

-40

-20

0

20

40

60

80

100

120

140

Junction Temperature (T

Figure 5:Test Circuit Waveforms

(Refer to Figure 5)