© 2016 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: 05/02/16

12 Amp Standard SCRs

Figure 9: Maximum Allowable Ambient Temperature

vs. Average On-State Current

0

20

40

60

80

100

120

0

.

0

Sxx12V

Average On-State Current [I

0.5

1.0

1.5

2.0

Sxx12R

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

FREE AIR RATING

Sxx12L

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

1

10

100

1000

0

0

0

1

0

0

1

0

1

1

Surge Current Duration - Full Cycles

Figure 12: Surge Peak On-State Current vs. Number of Cycles

SUPPLY FREQUENCY: 60 Hz Sinusoidal

LOAD: Resistive

RMS On-State Current: [I

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.