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©2010 Littelfuse, Inc

Revised: July 29, 2010 09:54 AM

Specifications are subject to change without notice.

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

Sxx04xSx Series

4 Amp Sensitive SCRs

0.1

1.0

10.0

100.0

1

10

100

1000

Sxx04VSy

Sxx04DSy

Surge Current Duration -- Full Cycles

Figure 13: Surge Peak On-State Current vs. Number of Cycles

Figure 14: Simple Test Circuit for Gate Trigger Voltage and Current

LOAD: Resistive

RMS On-State Current: [I

Notes:

following surge current interval.

2. Overload may not be repeated until junction

temperature has returned to steady-state

rated value.

I

To measure gate trigger voltage and current, raise gate

Can be computed from

the relationship

I

= I - ____ Amps

1000

where I

dropping

Note: I

may turn out to be a negative quantity (trigger

current flows out from gate lead). If negative current

occurs, I

value is not a valid reading. Remove 1 k resistor

and use I as the more correct I

value. This will occur on

12 μA gate products.

Reset

Normally-closed

Pushbutton

6V

DC

+

–

D.U.T.

100

R1

1 k

(1%)

100

I

GT

I

G

IN4001

V1

V

GT