C718
53mm / 5.0 kV THYRISTOR
Type C718 thyristor is suitable for phase control applications such as HVDC valves, static
VAR compensators and synchronous motor drives.
The silicon junction is manufactured by the proven multi-diffusion process and is supplied in
an industry standard disc-type package, ready to mount to forced or naturally cooled heat
dissipators using commercially available mechanical clamping hardware.
PRINCIPAL RATINGS AND CHARACTERISTICS
C718 Thyristor
ON-STATE CHARACTERISTIC
On-state current , It (amperes)
10000
1000
Process Maximum
Tj=125 degC
Vt = -2.4471 + .87035*ln(It)
Repetitive peak offstate & reverse volts
VD R M
VR R M
T J=0
to 125oC
up to
5000
Repetitive working
crest voltage
VD W M
VD R M
T J=0
to 125oC
0.8VD R M
0.8VR R M
Off-state & reverse
leakage current
ID W M
IR W M
T J=0
to 125oC
75
75
ma
Average on-state
current
IT(AV)
T case=
70oC
750
A
Peak half-cycle
non-rep surge current
IT S M
60 Hz
50 Hz
7
6.5
kA
On-state voltage
VT M
IT =1kA
tP=8ms
T J=125oC
2.1
V
Critical rate of rise
of on-state current
di/dt
rep
T J=125oC
60 Hz
75
A/us
Critical rate of rise
of off-state voltage
dv/dt
T J=125oC
V D =.67VD R M
1000
V/us
Recovery current
IR M
T J=125oC
2A/us
5A/us
60
100
+.0016249*It - .096917*sqrt(It)
100
0
1
2
3
4
5
6
7
8
9
10
On-state Voltage , Vt (volts)
MECHANICAL OUTLINE
J
CL
CL
V
2 0° ±5 °
A
Turn-on delay
td
Vd=.5VD R M
3
us
Turn-off time
T off
5A/us,-100V
20V/us to 2000V
500
us
Thermal resistance
R thJC
.025
c/w
Externally applied
clamping force
F
5500
24.5
lbs.
kN
A Ø
B Ø
D
B Ø
A Φ = 2.96 in (75.2 mm)
B Φ =1.90 in (48.3 mm)
D=1.07 in (27.2 mm)
REPETITIVE PEAK REVERSE
AND OFF-STATE BLOCKING
VOLTAGE
TJ= 0 to 125oC
MODEL
VD R M
VR R M
(volts)
(volts)
C718EP
5000
5000
C718DT
4900
4900
C718DN
4800
4800
C718DS
4700
4700
C718DM
4600
4600
C718DE
4500
4500
PG:6.063 11/16/90
175 GREAT VALLEY PKWY.
MALVERN , PA 19355 USA
C718 / 6RT118
MAXIMUM PEAK RECOVERY CURRENT
versus COMMUTATING di/dt
Full Cycle Average Power Loss
per C718 Thyristor
Peak Recovery Current, Irm, (A)
Avg. Power, Pavg (W)
2000
conduction angle (degrees)
100
180
1800
125 degC
1600
150
25 degC
1400
conduction angle
120
1200
90
1000
800
60
600
30
400
200
0
0
250
500
750
1000
1250
1500
1750
2000
Peak Current, It (A)
10
5
1
Circuit Commutating, di/dt, (A/us)
FULL CYCLE AVERAGE POWER LOSS
versus
PEAK CURRENT at 50/60 Hz
(plasma spreading and conduction loss)
Average Power ,Pavg (Watts)
3000
overlap angle
120 deg.sq. wave
is "mu"
2750
mu
(o)
10
20
40
GATE SUPPLY REQUIREMENTS
Open circuit voltage
2500
30 V
IT
2250
Short circuit current
- rise time
3 A
0.5us
Pulse duration (min)
20 us
2000
1750
MU
MU
120 degrees
1500
conduction angle is 120 deg plus MU
1250
1000
750
500
250
0
0
250 500 750 1000 1250 1500 1750 2000 2250 2500
Peak Current , It (Amperes)
11/16/90
PG:6.063 sh2 date: 11/16/90