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