297

Revised: December 9, 2010 02:31 PM

©2010 Littelfuse, Inc

Specifications are subject to change without notice.

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

55 Amp Standard SCRs

Sxx55x Series

Figure 1: Normalized DC Gate Trigger Current

vs. Junction Temperature

Figure 2: Normalized DC Gate Trigger Voltage

vs. Junction Temperature

125

0.0

0.5

1.0

1.5

2.0

-40

-15

10

35

60

85

110

Junction Temperature (T

Figure 5: Power Dissipation (Typical)

vs. RMS On-State Current

Figure 6: Maximum Allowable Case Temperature

vs. RMS On-State Current

Figure 3: Normalized DC Holding Current

vs. Junction Temperature

Figure 4: On-State Current vs. On-State Voltage

(Typical)

125

0.0

0.5

1.0

1.5

2.0

-40

-15

10

35

60

85

110

Junction Temperature (T

125

0.0

0.5

1.0

1.5

2.0

-40

-15

10

35

60

85

110

Junction Temperature (T

T

0

20

40

60

80

100

120

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

Instantaneous On-state Voltage (v

0

10

20

30

40

50

60

0

5

10

15

20

25

30

35

40

45

50

55

RMS On-State Current [I

70

75

80

85

90

95

100

105

110

115

120

125

130

0

5

10

15

20

25

30

35

40

45

50

55

60

RMS On-State Current [I

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

The "R" or "M" package rating is intended

for high surge condition use only and not

recommended for >50A rms continuous

current use since narrow pin leads depend-

ing on lead length can exceed PCB solder

melting temperature. "W" package is

recommended for >50A rms continuous

current requirements.

Note: xx = voltage