1
Revised: January 25, 2013 08:34 AM
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Teccor® brand Thyristors
8 Amp Alternistor Quadrac for LED dimmer applications
Q6008LTH1LED Series
Q6008LTH1LED 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.
Q6008LTH1LED series is designed to meet low load
current characteristics typical in LED lighting applications.
By keeping holding current at 6mA maximum, this Quadrac
series is characterized and specified to perform best with
LED loads. The Q6008LTH1LED series is best suited for
LED dimming controls to obtain the lowest levels of light
output with a minimum probability of flickering.
Q6008LTH1LED series is offered in the industry standard
TO-220AB package with an isolated mounting tab that
makes it best suited for adding an external heat sink.
Symbol Value Unit
IT(RMS) 8 A
VDRM / VRRM 600 V
DIAC VBO 33 to 43 V
Schematic Symbol
Applications
Excellent for AC switching and phase control applications
such as lighting and motor speed controls. Typical
applications are AC solid-state switches, light dimmers
with LED loads, small low current motor in power tools,
and low current motors in home/brown goods appliances.
Internally constructed isolated package is offered for ease
of heat sinking with highest isolation voltage.
Agency Approval
Agency Agency File Number
®L Package : E71639
MT2 MT1
T
RoHS
Features
• As low as 6mA max
holding current
• UL recognized TO-220AB
package
• 110°C rated junction
temperature
• di/dt performance of
70A/μs
• QUADRAC version
includes intergrated DIAC
• Provides full control
of light out put at the
extreme low end of load
conditions.
• 2500V AC min isolation
between mounting tab
and active terminals
• Improves margin of safe
operation with less heat
sinking required
• Enable survivability
of typically LED load
operating characteristics
• Simplicity of circuit design
& layout
Benefits
2
Revised: January 25, 2013 08:34 AM
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Teccor® brand Thyristors
8 Amp Alternistor Quadrac for LED dimmer applications
Q6008LTH1LED Series
Absolute Maximum Ratings
Symbol Parameter Value Unit
IT(RMS) RMS forward current Tc = 80°C 8 A
ITSM Peak non-repetitive surge current
single half cycle; f = 50Hz;
TJ (initial) = 25°C 80
A
single half cycle; f = 60Hz;
TJ (initial) = 25°C 85
I2t I2t value for fusing tp = 8.3ms 30 A2s
di/dt Critical rate-of-rise of on-state current f = 60Hz; TJ =110°C 70 A/µs
IGM Peak gate current TJ = 110°C 1. 5 A
Tstg Storage temperature range -40 to 150 °C
TJOperating junction temperature range -40 to 110 °C
Electrical Characteristics (TJ = 25°C, unless otherwise specified) – Alternistor Quadrac
Symbol Test Conditions Value Unit
IHIT = 15mA (initial) MAX. 6 mA
dv/dt VD = VDRM; gate open; TJ=110°C MIN. 50 V/μs
dv/dt(c) di/dt(c) = 0.54 x IT(rms) / ms; TJ = 110°C MIN. 10 V/μs
tgt (note 1) TYP. 3 μs
(1) Reference test circuit in figure 7 and waveform in figure 8; CT = 0.1μF with 0.1μs rise time.
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. 5V
IBO Peak Breakover Current MAX. 25 uA
CTTrigger Firing Capacitance MAX. 0.1 µF
(1) Reference test circuit in figure 7 and waveform in figure 8.
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
µA
TJ = 110°C 500
Thermal Resistances
Symbol Parameter Value Unit
Rθ(J-C) Junction to case (AC) 2.8 °C/W
Rθ(J-A) Junction to ambient 50 °C/W
3
Revised: January 25, 2013 08:34 AM
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Teccor® brand Thyristors
8 Amp Alternistor Quadrac for LED dimmer applications
Q6008LTH1LED Series
Figure 1: Normalized DC Holding Current
vs. Junction Temperature
Junction Temperature (T
J
) -- °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
T
J
= 25°C
0
5
10
15
20
25
30
35
40
45
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
0
2
4
6
8
10
12
0246810
RMS On-State Current [I
T(RMS)
] - (Amps)
Average On-State Power Dissipation
[P
D(AV)
] - (Watts)
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 360°
70
80
90
100
110
120
024681012
RMS On-State Current [I
T(RMS)
] - Amps
Maximum Allowable Case Temperature
(T
C
) - °C
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
Figure 2: On-State Current vs. On-State Voltage
(Typical)
Figure 3: Power Dissipation vs. RMS On-State Current
(Typical)
Figure 4: Maximum Allowable Case Temperature
vs. RMS On-State Current
Figure 5: Surge Peak On-State Current vs. Number of Cycles
1
10
100
1000
110 100 1000
Surge Current Duration -- Full Cycles
Peak Surge (Non-repetitive)
On-state Current (ITSM) – Amps
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.
4
Revised: January 25, 2013 08:34 AM
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Teccor® brand Thyristors
8 Amp Alternistor Quadrac for LED dimmer applications
Q6008LTH1LED Series
-8%
-6%
-4%
-2%
0%
2%
4%
6%
-40-20 020406080100 120 140
Junction Temperature (TJ) -- °C
V
BO
Change -- %
Figure 6: 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
Figure 7: Test Circuit
Figure 8: Test Circuit Waveform
5
Revised: January 25, 2013 08:34 AM
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Teccor® brand Thyristors
8 Amp Alternistor Quadrac for LED dimmer applications
Q6008LTH1LED Series
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°C +0/-5
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), 110°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
flammability classification 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
6
Revised: January 25, 2013 08:34 AM
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
Teccor® brand Thyristors
8 Amp Alternistor Quadrac for LED dimmer applications
Q6008LTH1LED Series
Product Selector
Part Number Type Package
Q6008LTH1LED Alternistor Quadrac TO-220L
Dimensions — TO-220AB (L-Package) — Isolated Mounting Tab
Dimension Inches Millimeters
Min Max Min Max
A 0.380 0.420 9.65 10.67
B0.105 0.115 2.67 2.92
C 0.230 0.250 5.84 6.35
D0.590 0.620 14.99 15.75
E 0.142 0.147 3.61 3.73
F 0.110 0.130 2.79 3.30
G0.540 0.575 13.72 14.61
H0.025 0.035 0.64 0.89
J0.195 0.205 4.95 5.21
K0.095 0.105 2.41 2.67
L 0.060 0.075 1.52 1.91
M0.085 0.095 2.16 2.41
N 0.018 0.024 0.46 0.61
O 0.178 0.188 4.52 4.78
P0.045 0.060 1. 14 1.52
R 0.038 0.048 0.97 1.22
K
J
A
H
G
B
F
E
C
D
L
R
T
C
MEASURING POINT
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
is 8 in-lbs. (0.904 Nm).
Packing Options
Part Number Marking Weight Packing Mode Base Quantity
Q6008LTH1LED Q6008LTH1 2.2 g Bulk 500
Q6008LTH1LEDTP Q6008LTH1 2.2 g Tube 500 (50 per tube)
Part Marking SystemPart Numbering System
Q60 08 LT H1
DEVICE TYPE
Q: Quadrac
VOLTAGE RATING
60: 600V
CURRENT RATING
08: 8A Trigger
T: Internal Diac (33V – 43V)
PACKAGE TYPE
L: TO-220 (Isolated)
TRIAC TYPE
H1: Low Holding Current
Alternistor Quadrac
LED LIGHTING APPLICATION
LED
®
YMXXX
Q6008LTH1
TO-220 AB - (L Package)
Date Code Marking
Y:Year Code
M: Month Code
XXX: Lot Trace Code
