Littelfuse QxxxxLTx Series - Manual (Page 4)

172
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor ® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
QxxxxLTx Series
Figure 1: Normalized DC Holding Current
vs. Junction Temperature
Junction Temperature (T
J
) -- °C
Ratio of I
H
/I
H
(T
J
= 2
5
°C)
0.0
0.5
1.0
1.5
2.0
-40 -15 10 35 60 85 110
Figure 2: On-State Current vs. On-State Voltage
(Typical) (4A)
T
J
= 25°C
0
2
4
6
8
10
12
14
16
0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Instantaneous On-state Voltage (v
T
) – Volts
In
stan
tan
e
o
u
s
O
n
-state C
u
rr
e
n
t
(i T
) –
Am
p
s
Qxx04LT
T
J
= 25°C
0
5
10
15
20
25
30
35
40
45
50
0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7
Instantaneous On-state Voltage (v
T
) – Volts
Instantaneous On-state Current (i
T
) – Amps
Qxx06LT/Qxx06LTH
Qxx08LT/Qxx08LTH
Qxx10LT/Qxx10LTH
Qxx15LT
Qxx15LTH
0
2
4
6
8
10
12
14
16
18
0 2 4 6 8 10 12 14 16
RMS On-State Current [I
T(RMS)
] - (Amps)
Av
e
ra
g
e
O
n
-S
tate
P
o
wer D
is
s
ip
a
ti
o
n
[P
D(
AV
)
] - (Watts
)
Qxx15LT
Qxx15LTH
Qxx06LT/Qxx06LTH
Qxx08LT/Qxx08LTH
Qxx10LT/Qxx10LTH
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 360°
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
RMS On-State Current [I
T(RMS)
] - (Amps)
Av
e
ra
g
e
O
n
-S
tate
P
o
wer D
is
s
ip
a
ti
o
n
[P
D(AV)
] - (Watts)
Qxx04LT
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 360°
70
80
90
100
110
120
130
0 2 4 6 8 10 12 14 16
RMS On-State Current [I
T(RMS)
] - Amps
M
axi
m
u
m
A
ll
o
w
a
b
le C
a
se T
e
m
p
er
at
u
re
(T
C
) - °
C
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
Qxx15LT
Qxx15LTH
Qxx10LT
Qxx10LTH
Qxx08LT
Qxx08LTH
Qxx06LT
Qxx06LTH
Qxx04LT
Figure 3: On-State Current vs. On-State Voltage
(Typical) (6A to 15A)
Figure 5: Power Dissipation vs. RMS On-State Current
(Typical) (6A to 15A)
Figure 4: Power Dissipation vs. RMS On-State
Current (Typical) (4A)
Figure 6: Maximum Allowable Case Temperature
vs. RMS On-State Current