© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/14
Teccor® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
QxxxxLTx Series
Description
Main Features
The Quadrac is an internally triggered Triac designed for
AC switching and phase control applications. It is a Triac
and DIAC in a single package, which saves user expense
by eliminating the need for separate Triac and DIAC
components.
Standard type devices normally operate in Quadrants I & III
triggered from AC line.
AlternistortypeQuadracsareusedincircuitsrequiringhigh
dv/dt capability.
Symbol Value Unit
IT(RMS) 4 to 15 A
VDRM / VRRM 400 to 600 V
DIAC VBO 33 to 43 V
Schematic Symbol Applications
ExcellentforACswitchingandphasecontrolapplications
such as lighting and heating. Typical applications are AC
solid-state switches, light dimmers, power tools, home/
brown goods and white goods appliances.
AlternistorQuadracs(nosnubberrequired)areusedin
applicationswithextremelyinductiveloadsrequiring
highest commutation performance.
Internally constructed isolated package is offered for ease
of heat sinking with highest isolation voltage.
Features & Benefits
•RoHSCompliant
•Glass–passivated
junctions
•Voltagecapabilityupto
600 V
•Surgecapabilityupto
200 A
Agency Approval
Agency Agency File Number
®
LPackage:E71639
MT2 MT1
T
®
RoHS
Additional Information
Datasheet Samples
Resources
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/14
Teccor® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
Absolute Maximum Ratings
Symbol Parameter
Value
Unit
Qxx04LT
Qxx06LT /
Qxx06LTH
Qxx08LT /
Qxx08LTH
Qxx10LT /
Qxx10LTH
Qxx15LT /
Qxx15LTH
IT(RMS) RMS forward current
Qxx04LT: TC=95°C
Qxx06LT/Qxx08LT/Qxx10LT: TC=90°C
Qxx15LT: TC = 80°C
46810 15 A
ITSM Peak non-repetitive surge current
singlehalfcycle;f=50Hz;
TJ (initial) = 25°C 46 65 83 100 167
A
singlehalfcycle;f=60Hz;
TJ (initial) = 25°C 55 80 100 120 200
I2t I2t value for fusing tp = 8.3ms 12.5 26.5 41 60 166 A2s
di/dt Critical rate-of-rise of on-state current f=60Hz;TJ =125°C 50 70 100 A/µs
IGM Peak gate current TJ = 125°C 1. 5 A
Tstg Storage temperature range -40 to 150 °C
TJOperatingjunctiontemperaturerange -40 to 125 °C
Note: xx = voltage
Electrical Characteristics (TJ = 25°C, unless otherwise specified) – Standard Quadrac
Electrical Characteristics (TJ = 25°C, unless otherwise specified) – Alternistor Quadrac
Symbol Test Conditions
Value
Unit
Qxx04LT
Qxx06LT
Qxx08LT
Qxx10LT
Qxx15LT
IHIT = 200mA (initial) MAX. 40 50 60 60 70 mA
dv/dt
VD = VDRM; gate open; TJ=100°C MIN. 400V 75 150 175 200 300
V/μs
600V 50 125 150 175 200
VD = VDRM; gate open; TJ=125°C MIN. 400V 50 100 120 150 200
600V 50 85 100 120 150
dv/dt(c) di/dt(c) = 0.54 x IT(rms) / ms; TJ = 125°C MIN. 3 4 V/μs
tgt (note 1) TYP. 3 μs
(1) Reference test circuit in figure 10 and waveform in figure 11; CT=0.1μFwith0.1μsrisetime.
Note: xx = voltage
Symbol Test Conditions
Value
Unit
Qxx06LTH
Qxx08LTH
Qxx10LTH
Qxx15LTH
IHIT = 20mA (initial) MAX. 50 50 60 70 mA
dv/dt
VD = VDRM; gate open; TJ=100°C MIN. 400V 575 925
V/μs
600V 425 775
VD = VDRM; gate open; TJ=125°C MIN. 400V 450 700
600V 350 600
dv/dt(c) di/dt(c) = 0.54 x IT(rms) / ms; TJ = 125°C MIN. 25 30 V/μs
tgt (note 1) TYP. 3 μs
(1) Reference test circuit in figure 10 and waveform in figure 11; CT=0.1μFwith0.1μsrisetime.
Note: xx = voltage
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/14
Teccor® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
Trigger DIAC Specifications
Symbol Test Conditions Value Unit
ΔVBO Breakover Voltage Symmetry MAX. 3 V
VBO Breakover Voltage, forward and reverse MIN. 33 V
MAX. 43
[ΔV±] Dynamic Breakback Voltage, forward and reverse (note 1) MIN. 5 V
IBO Peak Breakover Current MAX. 25 uA
CTTriggerFiringCapacitance MAX. 0.1 µF
(1) Reference test circuit in figure 10 and waveform in figure 11.
Thermal Resistances
Symbol Parameter Value Unit
Rθ(J-C) Junctiontocase(AC)
Qxx04LT 3.6
°C/W
Qxx06LT /
Qxx06LTH 3.3
Qxx08LT /
Qxx08LTH 2.8
Qxx10LT /
Qxx10LTH 2.6
Qxx15LT /
Qxx15LTH 2.1
Rθ(J-A) Junctiontoambient 50 °C/W
Note : xx = voltage
Static Characteristics
Symbol Test Conditions Value Unit
VTM IT = 1.41 x IT(rms) A; tp = 380μs MAX. 1. 6 V
IDRM / IRRM VDRM / VRRM
TJ= 25°C
MAX.
10
µATJ= 100°C 500
TJ= 125°C 2000
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/14
Teccor® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
Figure1:NormalizedDCHoldingCurrent
vs. Junction Temperature
Junction Temperature (TJ) -- °C
Ratio of I
H
/I
H
(T
J
= 25°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)
TJ = 25°C
0
2
4
6
8
10
12
14
16
0.70.8 0.91.0 1.11.2 1.31.4 1.51.6
Instantaneous On-state Voltage (vT) – Volts
Instantaneous On-state Current (iT) – Amps
Qxx04LT
TJ = 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 (vT) – Volts
Instantaneous On-state Current (iT) – Amps
Qxx06LT/Qxx06LTH
Qxx08LT/Qxx08LTH
Qxx10LT/Qxx10LTH
Qxx15LT
Qxx15LTH
0
2
4
6
8
10
12
14
16
18
0246810121
41
6
RMS On-State Current [IT(RMS)] - (Amps)
Average On-State Power Dissipation
[PD(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
0.00.5 1.01.5 2.02.5 3.03.5 4.0
RMS On-State Current [IT(RMS)] - (Amps)
Average On-State Power Dissipation
[PD(AV)] - (Watts)
Qxx04LT
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 360°
70
80
90
100
110
120
130
0246810121
41
6
RMS On-State Current [IT(RMS)] - Amps
Maximum Allowable Case Temperature
(TC) - °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
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/14
Teccor® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
Figure 7: Surge Peak On-State Current vs. Number of Cycles
Note: xx = voltage
1
10
100
1000
110 100 1000
Surge Current Duration -- Full Cycles
Peak Surge (Non-repetitive)
On-state Current (ITSM) – Amps
Qxx15LT/Qxx15LTH
Qxx04LT
Qxx10LT/Qxx10LTH
Qxx08LT/Qxx08LTH
Qxx06LT/Qxx06LTH
SupplyFrequency:60HzSinusoidal
Load: Resistive
RMSOn-StateCurrent:[IT(RMS)]: Maximum Rated
Value at Specific Case Temperature
Notes:
1. Gate control may be lost during and immediately
following surge current interval.
2.Overloadmaynotberepeateduntiljunction
temperature has returned to steady-state
rated value.
10%
-8%
-6%
-4%
-2%
0%
2%
4%
-40-20 020406080100 120
Junction Temperature (TJ) -- °C
V
BO
Change -- %
Figure 8: DIAC VBO Change vs. Junction Temperature
D.U.T. MT2
MT1
CT = 0.1 µF
T
VC
120 V
60 Hz
RL
∆V+
∆V-
V
C
+V
BO
-V
BO
0
I
L
+I
PK
-I
PK
0t
t
Typical pulse base width is 10μs
Figure 9: Test Circuit
Figure 10: Test Circuit Waveform
0
50
100
150
200
250
300
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Triggering Capacitance (C
T
) –
μ
F
Peak Output Current (I
PK
) – mA
Typical (35V Device)
Figure 11: Peak Output Current vs Triggering
Capacitance (Per Figure 9)
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/14
Teccor® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
Soldering Parameters
Reflow Condition Pb–Freeassembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (min to max) (ts)60 – 180 secs
Average ramp up rate (Liquidus Temp)
(TL) to peak 5°C/second max
TS(max) to TL - Ramp-up Rate 5°C/second max
Reflow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL)60 – 150 seconds
Peak Temperature (TP)260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 5°C/second max
Time 25°C to peak Temperature (TP)8 minutes Max.
Do not exceed 280°C
Environmental Specifications
Test Specifications and Conditions
High Temperature
Voltage Blocking
MIL-STD-750: Method 1040, Condition A
Rated VDRM (VAC-peak), 125°C, 1008
hours
Temperature Cycling
MIL-STD-750: Method 1051
-40°C to 150°C, 15-minute dwell,
100 cycles
Biased Temperature &
Humidity
EIA/JEDEC:JESD22-A101
320VDC,85°C,85%RH,1008hours
High Temp Storage MIL-STD-750: Method 1031
150°C, 1008 hours
Low-Temp Storage -40°C, 1008 hours
Thermal Shock
MIL-STD-750: Method 1056
0°C to 100°C, 5-minute dwell,
10-second transfer, 10 cycles
Autoclave
(Pressure Cooker Test)
EIA/JEDEC:JESD22-A102
121°C,100%RH,2atm,168hours
Resistance to
Solder Heat
MIL-STD-750: Method 2031
260°C, 10 seconds
Solderability ANSI/J-STD-002,Category3,TestA
Lead Bend MIL-STD-750:Method2036,ConditionE
Physical Specifications
Terminal Finish 1005 Matte Tin-plated
Body Material ULRecognizedepoxymeeting
ammabilityclassication94v-0
Lead Material Copper Alloy
Design Considerations
Careful selection of the correct device for the application’s
operating parameters and environment will go a long way
toward extending the operating life of the Thyristor. Good
design practice should limit the maximum continuous
current through the main terminals to 75% of the device
rating.Otherwaystoensurelonglifeforapowerdiscrete
semiconductor are proper heat sinking and selection of
voltageratingsforworstcaseconditions.Overheating,
overvoltage (including dv/dt), and surge currents are
the main killers of semiconductors. Correct mounting,
soldering, and forming of the leads also help protect
against component damage.
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
Preheat
P
r
e
h
eat
Ramp-upRamp-up
Ramp-down
R
am
p
-
do
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/14
Teccor® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
Product Selector
Part Number Voltage Type Package
400V 600V 800V 1000V
Qxx04LT X X Quadrac TO-220L
Qxx06LT X X Quadrac TO-220L
Qxx06LTH X X Alternistor Quadrac TO-220L
Qxx08LT X X Quadrac TO-220L
Qxx08LTH X X Alternistor Quadrac TO-220L
Qxx10LT X X Quadrac TO-220L
Qxx10LTH X X Alternistor Quadrac TO-220L
Qxx15LT X X Quadrac TO-220L
Qxx15LTH X X Alternistor Quadrac TO-220L
Note: xx = Voltage
Dimensions — TO-220AB (L-Package) — Isolated Mounting Tab
Dimension Inches Millimeters
Min Max Min Max
A 0.380 0.420 9.65 10.67
B 0.105 0.115 2.67 2.92
C 0.230 0.250 5.84 6.35
D0.590 0.620 14.99 15.75
E0.142 0.147 3.61 3.73
F0.110 0.130 2.79 3.30
G 0.540 0.575 13.72 14.61
H0.025 0.035 0.64 0.89
J 0.195 0.205 4.95 5.21
K 0.095 0.105 2.41 2.67
L 0.060 0.075 1.52 1.91
M 0.085 0.095 2.16 2.41
N 0.018 0.024 0.46 0.61
O0.178 0.188 4.52 4.78
P 0.045 0.060 1. 14 1.52
R 0.038 0.048 0.97 1.22
K
J
A
H
G
B
F
C
D
L
R
C
MT2
O
P
N
M
MT1 T (Trigger)
AREA (REF.)
0.17 in2
.320
8.13
.526
13.36
.276
7. 01
Note: Maximum torque
to be applied to mounting tab
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/14
Teccor® brand Thyristors
4 / 6 / 8 / 10 / 15 Amp Quadracs
Packing Options
Part Number Marking Weight Packing Mode Base Quantity
Qxx04LT Qxx04LT 2.2 g Bulk 500
Qxx04LTTP Qxx04LT 2.2 g Tube 500 (50 per tube)
Qxx06LT Qxx06LT 2.2 g Bulk 500
Qxx06LTTP Qxx06LT 2.2 g Tube 500 (50 per tube)
Qxx06LTH Qxx06LTH 2.2 g Bulk 500
Qxx06LTHTP Qxx06LTH 2.2 g Tube 500 (50 per tube)
Qxx08LT Qxx08LT 2.2 g Bulk 500
Qxx08LTTP Qxx08LT 2.2 g Tube 500 (50 per tube)
Qxx08LTH Qxx08LTH 2.2 g Bulk 500
Qxx08LTHTP Qxx08LTH 2.2 g Tube 500 (50 per tube)
Qxx10LT Qxx10LT 2.2 g Bulk 500
Qxx10LTTP Qxx10LT 2.2 g Tube 500 (50 per tube)
Qxx10LTH Qxx10LTH 2.2 g Bulk 500
Qxx10LTHTP Qxx10LTH 2.2 g Tube 500 (50 per tube)
Qxx15LT Qxx15LT 2.2 g Bulk 500
Qxx15LTTP Qxx15LT 2.2 g Tube 500 (50 per tube)
Qxx15LTH Qxx15LTH 2.2 g Bulk 500
Qxx15LTHTP Qxx15LTH 2.2 g Tube 500 (50 per tube)
Note: xx = Voltage
Part Marking SystemPart Numbering System
Q60 10 LT H 56
DEVICE TYPE
Q: Quadrac
VOLTAGE RATING
40: 400V
60: 600V
CURRENT RATING
04: 4A
06: 6A
08: 8A
10: 10A
15: 15A
Trigger
T: Internal Diac (33V – 43V)
PACKAGE TYPE
L: TO-220 (Isolated)
LEAD FORM DIMENSIONS
xx: Lead Form Option
TRIAC TYPE
(blank): Standard Triac
H: Alternistor Triac
®
YMXXX
Q6010LTH
TO-220 AB - (L Package)
Date Code Marking
Y:Year Code
M: Month Code
XXX: Lot Trace Code