256

Revised: July 29, 2010 09:54 AM

©2010 Littelfuse, Inc

Specifications are subject to change without notice.

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

12 Amp Standard SCRs

Sxx12x Series

Figure 6: Maximum Allowable Case Temperature

vs. RMS On-State Current

Figure 7: Maximum Allowable Case Temperature

vs. Average On-State Current

95

100

105

110

115

120

125

130

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

0

1

2

3

4

5

6

7

8

Average On-State Current [I

95

100

105

110

115

120

125

130

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

0

2

4

6

8

10

12

14

RMS On-State Current [I

Figure 8: Maximum Allowable Ambient Temperature

vs. RMS On-State Current

0

20

40

60

80

100

120

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

FREE AIR RATING

Sxx12V

Sxx12R

0.0

0.5

1.0

1.5

2.0

2.5

RMS On-State Current [I

Figure 9: Maximum Allowable Ambient Temperature

vs. Average On-State Current

0

20

40

60

80

100

120

5

.

1

0

.

1

5

.

0

0

.

0

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

FREE AIR RATING

Sxx12R

Sxx12V

Average On-State Current [I

Figure 10: Peak Capacitor Discharge Current

10

100

1000

0

.

0

5

0

.

5

2

0

.

5

5

.

0

Pulse Current Duration (t

I

TRM

t

W

Figure 11: Peak Capacitor Discharge Current Derating

0.0

0.2

0.4

0.6

0.8

1.0

1.2

0

25

50

75

100

125

150

Case Temperature (T