1000
10000
0
1
2
3
4
5
6
7
8
9
10
MAXIMUM ON-STATE CHARACTERISTIC
Initial Tj=125 degC
On-state current , It (amperes)
On-state Voltage , Vt (volts)
On-state Voltage , Vt (volts)
50000
100mm
100mm
100mm
100mm
100mm THYRIST
THYRIST
THYRIST
THYRIST
THYRISTOR PRESSP
OR PRESSP
OR PRESSP
OR PRESSP
OR PRESSPA K
A K
A K
A K
A K
4500V / 3250A
4500V / 3250A
4500V / 3250A
4500V / 3250A
4500V / 3250A
REPETITIVE PEAK REVERSE
AND OFF-STATE BLOCKING
V O L T A G E
T
J
= 0 to 125
o
C
M O D E L
V
D R M
V
R R M
(volts)
(volts)
C791ADE
4500
4500
C791ADD
4400
4400
C791ADC
4300
4300
C791ADB
4200
4200
C791ADA
4100
4100
C791ADP
4000
4000
MECHANICAL OUTLINE
C791A
C791A
C791A
C791A
C791A
175 GREAT VALLEY PKWY. MALVERN, PA 19355
U S A
Page 1 Rev. 2 8/97
Type C791A thyristor is suitable for phase control applications such as for HVDC valves,static VAR
compensators and synchronous motor drives.The silicon junction design utilizes a second generation
pilot gate and a unique orientation of emitter shorts which promote the lateral expansion of conducting
plasma resulting in lower spreading losses while achieving high dv/dt withstand.It is supplied in an
industry accepted disc-type package,ready to mount using commercially available heat dissipators and
mechanical clamping hardwar
e
.
ELECTRICAL
CREEPAGE / STRIKE
1.6 / 1.0 in
40.6 / 25.4 mm
CLAMPING FORCE
(range)
17000 - 19000 lb
75 - 84 kN
B
B
A
2 0 5
D
CL
CL
J
A
A
A
A
A
= 5.65 in (143.5 mm)
= 5.65 in (143.5 mm)
= 5.65 in (143.5 mm)
= 5.65 in (143.5 mm)
= 5.65 in (143.5 mm)
B
B
B
B
B
=3.92 in (99.4 mm)
=3.92 in (99.4 mm)
=3.92 in (99.4 mm)
=3.92 in (99.4 mm)
=3.92 in (99.4 mm)
D=1.45in (36.8 mm)
D=1.45in (36.8 mm)
D=1.45in (36.8 mm)
D=1.45in (36.8 mm)
D=1.45in (36.8 mm)
0.001
0.01
0.1
1
10
Zthj-case (degC/watt)
Power On-time (seconds)
Power On-time (seconds)
o1a:t305tau
.0001
.001
.01
Rthj-c=.005 degC/W
add .002 for
case to sink
Thermal Impedance
Repetitive peak off-
Repetitive peak off-
Repetitive peak off-
Repetitive peak off-
Repetitive peak off-
V
V
V
V
V
D R M
D R M
D R M
D R M
D R M
T
T
T
T
T
J
J
J
J
J
=0
=0
=0
=0
=0
up to
up to
up to
up to
up to
V
V
V
V
V
state & reverse volts
state & reverse volts
state & reverse volts
state & reverse volts
state & reverse volts
V
V
V
V
V
R R M
R R M
R R M
R R M
R R M
to 125
to 125
to 125
to 125
to 125
o
o
o
o
o
C
C
C
C
C
4500
4500
4500
4500
4500
Repetitive working
Repetitive working
Repetitive working
Repetitive working
Repetitive working
V
V
V
V
V
D W M
D W M
D W M
D W M
D W M
T
T
T
T
T
J
J
J
J
J
=0
=0
=0
=0
=0
0.8V
0.8V
0.8V
0.8V
0.8V
D R M
D R M
D R M
D R M
D R M
crest voltage
crest voltage
crest voltage
crest voltage
crest voltage
V
V
V
V
V
D R M
D R M
D R M
D R M
D R M
to 125
to 125
to 125
to 125
to 125
o
o
o
o
o
C
C
C
C
C
0.8V
0.8V
0.8V
0.8V
0.8V
R R M
R R M
R R M
R R M
R R M
Off-state & reverse
Off-state & reverse
Off-state & reverse
Off-state & reverse
Off-state & reverse
I
I
I
I
I
D R M
D R M
D R M
D R M
D R M
T
T
T
T
T
J
J
J
J
J
=0
=0
=0
=0
=0
450
450
450
450
450
m a
m a
m a
m a
m a
leakage current
leakage current
leakage current
leakage current
leakage current
I
I
I
I
I
R R M
R R M
R R M
R R M
R R M
to 125
to 125
to 125
to 125
to 125
o
o
o
o
o
C
C
C
C
C
350
350
350
350
350
Average on-state
Average on-state
Average on-state
Average on-state
Average on-state
I
I
I
I
I
T(AV)
T(AV)
T(AV)
T(AV)
T(AV)
T
T
T
T
T
case
case
case
case
case
=
=
=
=
=
3250
3250
3250
3250
3250
A
A
A
A
A
current
current
current
current
current
70
70
70
70
70
o
o
o
o
o
C
C
C
C
C
Peak half-cycle
Peak half-cycle
Peak half-cycle
Peak half-cycle
Peak half-cycle
I
I
I
I
I
T S M
T S M
T S M
T S M
T S M
60 Hz
60 Hz
60 Hz
60 Hz
60 Hz
42
42
42
42
42
kA
kA
kA
kA
kA
non-rep surge current
non-rep surge current
non-rep surge current
non-rep surge current
non-rep surge current
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
38
38
38
38
38
On-state voltage
On-state voltage
On-state voltage
On-state voltage
On-state voltage
V
V
V
V
V
T M
T M
T M
T M
T M
I
I
I
I
I
T
T
T
T
T
=4000A
=4000A
=4000A
=4000A
=4000A
2.00
2.00
2.00
2.00
2.00
V
V
V
V
V
t
t
t
t
t
P
P
P
P
P
=8.3ms
=8.3ms
=8.3ms
=8.3ms
=8.3ms
T
T
T
T
T
J
J
J
J
J
=125
=125
=125
=125
=125
o
o
o
o
o
C
C
C
C
C
Critical rate of rise
Critical rate of rise
Critical rate of rise
Critical rate of rise
Critical rate of rise
di/dt
di/dt
di/dt
di/dt
di/dt
T
T
T
T
T
J
J
J
J
J
=125
=125
=125
=125
=125
o
o
o
o
o
C
C
C
C
C
100
100
100
100
100
A/us
A/us
A/us
A/us
A/us
of on-state current
of on-state current
of on-state current
of on-state current
of on-state current
rep
rep
rep
rep
rep
60 Hz
60 Hz
60 Hz
60 Hz
60 Hz
Critical rate of rise
Critical rate of rise
Critical rate of rise
Critical rate of rise
Critical rate of rise
dv/dt
dv/dt
dv/dt
dv/dt
dv/dt
T
T
T
T
T
J
J
J
J
J
=125
=125
=125
=125
=125
o
o
o
o
o
C
C
C
C
C
1000
1000
1000
1000
1000
V/us
V/us
V/us
V/us
V/us
of off-state voltage
of off-state voltage
of off-state voltage
of off-state voltage
of off-state voltage
V
V
V
V
V
D
D
D
D
D
=.67V
=.67V
=.67V
=.67V
=.67V
D R M
D R M
D R M
D R M
D R M
Recovery current
Recovery current
Recovery current
Recovery current
Recovery current
I
I
I
I
I
R M
R M
R M
R M
R M
T
T
T
T
T
J
J
J
J
J
=105
=105
=105
=105
=105
o
o
o
o
o
C
C
C
C
C
A
A
A
A
A
2A/us
2A/us
2A/us
2A/us
2A/us
90
90
90
90
90
5A/us
5A/us
5A/us
5A/us
5A/us
195
195
195
195
195
Turn-on delay
Turn-on delay
Turn-on delay
Turn-on delay
Turn-on delay
t
t
t
t
t
d
d
d
d
d
Vd=.5V
Vd=.5V
Vd=.5V
Vd=.5V
Vd=.5V
D R M
D R M
D R M
D R M
D R M
4
4
4
4
4
us
us
us
us
us
Turn-off time
Turn-off time
Turn-off time
Turn-off time
Turn-off time
T
T
T
T
T
off
off
off
off
off
5A/us,-100V
5A/us,-100V
5A/us,-100V
5A/us,-100V
5A/us,-100V
500
500
500
500
500
us
us
us
us
us
20V/us to 2000V
20V/us to 2000V
20V/us to 2000V
20V/us to 2000V
20V/us to 2000V
Thermal resistance
Thermal resistance
Thermal resistance
Thermal resistance
Thermal resistance
R
R
R
R
R
thJC
thJC
thJC
thJC
thJC
.007
.007
.007
.007
.007
c/w
c/w
c/w
c/w
c/w
Externally applied
Externally applied
Externally applied
Externally applied
Externally applied
F
F
F
F
F
17000
17000
17000
17000
17000
lbs.
lbs.
lbs.
lbs.
lbs.
clamping force
clamping force
clamping force
clamping force
clamping force
-19000
-19000
-19000
-19000
-19000
LIMITING CHARACTERISTICS AND RATINGS
LIMITING CHARACTERISTICS AND RATINGS
LIMITING CHARACTERISTICS AND RATINGS
LIMITING CHARACTERISTICS AND RATINGS
LIMITING CHARACTERISTICS AND RATINGS
0
10
20
30
40
50
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Gate Characteristics and
Gate Supply Requirements
Instantaneous Voltage (V)
Instantaneous Current (A)
Instantaneous Current (A)
T302
dynamic @ 105 C
static (dc) @ 25 C
load line
Page 2 Rev. 2 8/97
C791A / T302A
THYRISTOR GATE IMPEDANCE
Enhanced by fast rising gate voltage,increasing anode bias
and junction temperature.It is at a minimum for dc current,
zero anode bias and low temperature.
GATE SUPPLY
Prefer 50V/10 ohm for supporting the di/dt rating
and life expectancy. The short circuit current risetime
should be nominally 0.5us and the duration longer than the
expected delay time for all magnitudes of anode
bias. Practically 10-30us is recommended followed by a back
porch of 750ma if needed to sustain conduction.
MINIMUM ACCEPTABLE GATE CURRENT
The intersection of the load line and gate impedance
characteristic indicates the minimum value of actual current
needed during the delay time interval to support di/dt.A
different load line meeting this criterion may be used.
MAXIMUM GATE RATINGS
Peak gate power,Pgm(100us) = 300 W
Average gate power,Pg(av) = 50W
Peak gate current,Igfm = 25 A
Peak reverse voltage,Vgrm = 25 V
0
250
500
750
1000
1250
1500
1750
2000
2250
2500
2750
3000
U = 2 deg
U = 20
U = 40
0
500
1000
1500
2000
2500
3000
3500
4000
FULL CYCLE AVERAGE POWER DISSIPATION
120-deg Conduction -includes spread loss
as function of Overlap Angle , U
Average Power , Pavg (watts)
Peak Current ,It (amperes)
Peak Current ,It (amperes)
4500V 100mm
U
U
120 degrees
120 deg + U
0
500
1000
1500
2000
2500
0
500
1000
1500
2000
2500
3000
3500
4000
FULL CYCLE AVERAGE POWER DISSIPATION
Sine Wave - includes spread loss
as function of conduction angle
Peak Current, It (amperes)
Peak Current, It (amperes)
4.5kv 100mm
conduction angle (degrees)
180
150
120
90
60
30
10
100
Process Maximum
Specified Minimum
0.1
1
PEAK RECOVERY CURRENT
versus
COMMUTATING di/dt
Peak Recovery Current,Irm(rec),(A)
diR/dt (A/us)
diR/dt (A/us)
6RT302
di
dt
di
dt
I
RM(REC)
R
(REC)
t
Page 3 Rev. 2 8/97
0
1000
2000
3000
4000
5000
0
100
200
300
400
INRUSH CURRENT (di/dt) RATING
versus
SWITCHING VOLTAGE
Switching Voltage,Vd (volts)
di/dt in A/us
di/dt in A/us
T302
single shot
50/60 Hz
Snubber resistor = 30 ohms
snubber inductance = 12 uH
C791A / T302A
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