Sensitive SCRs
Data Sheets
12
Average On-state
Power Dissipation [P
D(AV)
] – Watts
10
CURRENT WAVEFORM: Half Sine Wave
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180˚
Reset
Normally-closed
Pushbutton
8
6
100
+
6 V
DC
–
V1
4
D.U.T.
I
GT
I
G
1k
(1%)
IN4001
100
V
GT
R1
2
6 A to 10 A
TO-220, TO-202,
TO-251, and TO-252
0
0
2
4
6
8
10
RMS On-state Current [I
T(RMS)
] – Amps
Figure E5.17 Power Dissipation (Typical) versus RMS On-state Current
Figure E5.19 Simple Test Circuit for Gate Trigger Voltage and
Current Measurement
9.0
8.0
See General Notes for specific device
operating temperature range.
Note: V1 — 0 V to 10 V dc meter
V
GT
— 0 V to 1 V dc meter
I
G
— 0 mA to 1 mA dc milliammeter
R1 — 1 k potentiometer
To measure gate trigger voltage and current, raise gate voltage
(V
GT
) until meter reading V1 drops from 6 V to 1 V. Gate trigger
voltage is the reading on V
GT
just prior to V1 dropping. Gate trig-
ger current I
GT
can be computed from the relationship
V
GT
-
I GT = I G
–
------------ Amps
1000
where I
G
is reading (in amperes) on meter just prior to V1 drop-
ping.
IL
(TC = 25 ˚C)
IL
Ratio of
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
-65
-40
-15
+25
+65
+110 +125
Note: I
GT
may turn out to be a negative quantity (trigger current
flows out from gate lead).
Case Temperature (TC) – ˚C
Figure E5.18 Normalized DC Latching Current versus Case Temperature
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E5 - 10
©2002 Teccor Electronics
Thyristor Product Catalog
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