282

Revised: May 10, 2010 09:33 PM

©2010 Littelfuse, Inc

Specifications are subject to change without notice.

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

35 Amp Standard SCRs

Sxx35x Series

10

100

1000

1

10

100

1000

Surge Current Duration -- Full Cycles

Figure 7: Maximum Allowable Case Temperature vs.

Average On-State Current

105

80

85

90

95

100

110

115

120

125

130

0

5

10

15

20

25

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

Average On-State Current [I

Figure 8: Peak Capacitor Discharge Current

Figure 9: Peak Capacitor Discharge Current Derating

10

100

1000

0.5

1.0

10.0

50.0

Pulse Current Duration (t

I

TRM

t

W

0.0

0.2

0.4

0.6

0.8

1.0

1.2

0255075

100

125

150

Case Temperature (T

Figure 10: 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.