Data Sheets

SCRs

©2004 Littelfuse, Inc.

E6 - 11

http://www.littelfuse.com

Thyristor Product Catalog

+1 972-580-7777

Figure E6.23 Peak Surge Current versus Surge Current Duration

Figure E6.24 Power Dissipation (Typical) versus RMS On-state Current

(1 A)

Figure E6.25 Power Dissipation (Typical) versus RMS On-state Current

(6 A through 20 A)

8

1

2

3

4

5

6

1000

10

20

30

40

50

60

80

100

200

300

400

500

600

800

12

3

5

4

6 7 8 10

20

30 40 60 80100

200 300400 600

1000

Surge Current Duration – Full Cycles

70 A Devices

65 A TO-218

55 A Devices

25 A Devices

35 A Devices

20 A Devices

16 A Devices

15 A Devices

12 A Devices

10 A Devices

1 A De

vices

SUPPLY FREQUENCY: 60 Hz Sinusoidal

LOAD: Resistive

RMS ON-STATE CURRENT: [IT(RMS)]: Max-

Rated Value at Specified Case Temperature

Notes:

1) Gate control may be lost during and

immediately following surge current

interval.

2) Overload may not be repeated until

junction temperature has returned to

steady-state rated value.

8 A Devices

6 A Devices

40 A Devices

0

0.2

0.4

0.6

0.8

0

0.4

0.8

1.0

0.2

RMS On-state Current [I

CURRENT WAVEFORM: Half Sine Wave

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180˚

1.0 A Devices

1.0

0.6

04

8

12

16

0

RMS On-state Current [I

CURRENT WAVEFORM: Half Sine Wave

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180˚

2

6

10

14

18

2

4

6

8

10

12

14

16

18

20

15 A to 20 A Devices

12 A Devices

6 A to 10 A Devices