PSTT PC / PSTT SC / PSTT ZC
TECHNICAL DATA
at 25°C
Type
Parameter
200mA gate current threshold
1.2A gate current threshold
Gate current rise time at anode
Voltage of
PSTT PC/12
PSTT SC/12
PSTT ZC/12
10
24
2.5
3
4
6
1.3
4.4
2*
7
12
typ. 1.2<1.5
6
25
<20
PSTT PC/20
PSTT SC/20
PSTT ZC/20
16
36
1.2
2
2.5
3
4
1.3
5.1
2*
7
12
typ. 1.2<1.5
6
25
<20
Symbol
Vgtl
Vgth
100V
200V
400V
800V
1200V
(di/dt)g
Unit
V
V
A/µs
A/µs
A/µs
A/µs
A/µs
A
mA
µA
mA
mA
V
V
µs
V
Peak gate current (typical)
Anode-cathode current at Vp
Maximum off state gate current
Minimum control current
Recommended control current
Control input voltage drop at 12mA
Maximum reverse control input voltage
Turn-on delay time at Ic=12mA
Zero crossing threshold for PSTT ZC
Ip
In
Io
Icm
Ic
Vin
Vinr
tdi
Vzt
*PSTT ZC < 40µA
HIGHLIGHTS
Economic – very easy to use – small size – powerful gate pulse triggers large and small
thyristors. Eliminates gate drive power supply – proven reliability in harsh industrial
environment.
APPLICATION INFORMATIONS
As the gate current is derived from the anode of the thyristor, the control circuit only
needs to supply the recommended control current which can be supplied directly from
the output of many logic devices. It is advisable to maintain the control current over the
entire conduction period of the thyristor. Once the thyristor is triggered, the gate current
ceases to flow because the anode voltage drops below the threshold voltage.
The control input consists of the light emitting diode of an optocoupler. Any such optical
component is subject to aging at elevated temperatures. Although the minimum control
current Icm is well below 7mA, a 12mA control signal is recommended to ensure reliable
operation beyond 100’000 hours in a worst case design. The turn-on delay tdi can be
reduced by pulse shaping, because it is inversely proportional to the control current.
Because the device derives its power from the anode of the thyristor, a minimum
operating voltage is required before any current can flow from the anode to the gate.
This threshold voltage limits the minimum regulated output voltage. For example for a
single-phase 115V ac controller triggered by a 1200V unit it is below 0.12%. For a 400V
supply it is much less and can safely be neglected in most applications.
POWERSEM GmbH, Walpersdorfer Str. 53
2006 POWERSEM reserves the right to change limits, test conditions and dimensions
91126 D- Schwabach
2/3
Phone: 09122 - 9764-0 Fax.: 09122 - 9764-20
POWERSEM [ POWERSEM GMBH ]
