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Teccor® brand Thyristors
12 Amp Alternistor Quadrac for LED dimmer applications
Q6012LTH1LED Series
Agency Approval
Agency
®
Main Features
Symbol
IT(RMS)
VDRM / VRRM
DIAC VBO
Agency File Number
L Package : E71639
Value
12
600
33 to 43
Unit
A
V
V
Schematic Symbol
MT2
MT1
T
RoHS
Description
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.
Q6012LTH1LED series is designed to meet low load current
characteristics typical in LED lighting applications.
By keeping holding current at 8mA maximum, this Quadrac
series is characterized and specified to perform best with
LED loads. The Q6012LTH1LED series is best suited for
LED dimming controls to obtain the lowest levels of light
output with a minimum probability of flickering.
Q6012LTH1LED 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.
Features
• As low as 8mA max
holding current
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• UL recognized TO-220AB
package
• 110°C rated junction
temperature
• di/dt performance of
70A /μs
• QUADRAC version
includes intergrated DIAC
Benefits
• Provides full control
of light out put at the
extreme low end of load
conditions.
b25et0w0eVeAnC
min isolation
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
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.
Q6012LTH1LED Series
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.
datasheet pdf - http://www.DataSheet4U.net/

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Teccor® brand Thyristors
12 Amp Alternistor Quadrac for LED dimmer applications
Absolute Maximum Ratings
Symbol
IT(RMS)
RMS forward current
Parameter
ITSM Peak non-repetitive surge current
I2t I2t value for fusing
di/dt Critical rate-of-rise of on-state current
IGM Peak gate current
Tstg Storage temperature range
TJ Operating junction temperature range
Tc = 90°C
single half cycle; f = 50Hz;
TJ (initial) = 25°C
single half cycle; f = 60Hz;
TJ (initial) = 25°C
tp = 8.3ms
f = 60Hz; TJ =110°C
TJ = 110°C
Electrical Characteristics (TJ = 25°C, unless otherwise specified) – Alternistor Quadrac
Symbol
Test Conditions
IH
dv/dt
dv/dt(c)
tgt
IT = 20mA (initial)
VD = VDRM; gate open; TJ=110°C
di/dt(c) = 0.54 x IT(rms) / ms; TJ = 110°C
(note 1)
(1) Reference test circuit in figure 7 and waveform in figure 8; CT = 0.1μF with 0.1μs rise time.
MAX.
MIN.
MIN.
TYP.
Value
12
110
120
60
70
1.5
-40 to 150
-40 to 110
Unit
A
A
A2s
A/µs
A
°C
°C
Value
8
45
2
3
Unit
mA
V/μs
V/μs
μs
Trigger DIAC Specifications
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Symbol
ΔVBO
Test Conditions
Breakover Voltage Symmetry
VBO Breakover Voltage, forward and reverse
[ΔV±]
Dynamic Breakback Voltage, forward and reverse (note 1)
IBO Peak Breakover Current
CT Trigger Firing Capacitance
(1) Reference test circuit in figure 7 and waveform in figure 8.
MAX.
MIN.
MAX.
MIN.
MAX.
MAX.
Static Characteristics
Symbol
VTM
IDRM / IRRM
Test Conditions
IT = 1.41 x IT(rms) A; tp = 380μs
VDRM / VRRM
TJ = 25°C
TJ = 110°C
Value
3
33
43
5
25
0.1
MAX.
MAX.
Value
1.6
10
1000
Unit
V
V
V
uA
µF
Unit
V
µA
Thermal Resistances
Rθ(J-C)
Rθ(J-A)
Symbol
Q6012LTH1LED Series
Parameter
Junction to case (AC)
Junction to ambient
2
Revised: January 25, 2013 08:34 AM
Value
2.3
50
Unit
°C/W
°C/W
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
datasheet pdf - http://www.DataSheet4U.net/

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Teccor® brand Thyristors
12 Amp Alternistor Quadrac for LED dimmer applications
Figure 1: Normalized DC Holding Current
vs. Junction Temperature
Figure 2: On-State Current vs. On-State Voltage
(Typical)
2.0
1.5
1.0
0.5
0.0
-40 -15 10 35 60 85 110
Junction Temperature (TJ) -- °C
Figure 3: Power Dissipation vs. RMS On-State Current
(Typical)
45
40
TJ = 25°C
35
30
25
20
15
10
5
0
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
Figure 4: Maximum Allowable Case Temperature
vs. RMS On-State Current
16
14
12
10
8
6
4
2
0
0
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CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 360°
2 4 6 8 10 12
RMS On-State Current [IT(RMS)] - (Amps)
14
130
120
110
100
90
80
70
0
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
2 4 6 8 10 12
RMS On-State Current [IT(RMS)] - Amps
14
Figure 5: Surge Peak On-State Current vs. Number of Cycles
1000
Supply Frequency: 60Hz Sinusoidal
Load: Resistive
RMS On-State Current: [IT(RMS)]: Maximum Rated
Value at Specific Case Temperature
100 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
1
1
Q6012LTH1LED Series
10 100
Surge Current Duration -- Full Cycles
1000
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.
datasheet pdf - http://www.DataSheet4U.net/

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Teccor® brand Thyristors
12 Amp Alternistor Quadrac for LED dimmer applications
Figure 6: DIAC VBO Change vs. Junction Temperature
6%
4%
2%
0%
-2%
-4%
-6%
-8%
-40
-20
0 20 40 60 80 100 120 140
Junction Temperature (TJ) -- °C
Figure 8: Test Circuit Waveform
Figure 7: Test Circuit
RL
120 V
60 Hz
VC
D.U.T.
T
CT = 0.1 µF
VC
+VBO
V+
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MT2
MT1
V-
-VBO
Q6012LTH1LED Series
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.
datasheet pdf - http://www.DataSheet4U.net/

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Teccor® brand Thyristors
12 Amp Alternistor Quadrac for LED dimmer applications
Soldering Parameters
Reflow Condition
Pb – Free assembly
- Temperature Min (Ts(min))
Pre Heat - Temperature Max (Ts(max))
- Time (min to max) (ts)
Average ramp up rate (LiquidusTemp)
(TL) to peak
TS(max) to TL - Ramp-up Rate
Reflow
-Temperature (TL) (Liquidus)
- Temperature (tL)
Peak Temperature (TP)
Time within 5°C of actual peak
Temperature (tp)
Ramp-down Rate
Time 25°C to peakTemperature (TP)
Do not exceed
150°C
200°C
60 – 180 secs
5°C/second max
5°C/second max
217°C
60 – 150 seconds
260°C +0/-5
20 – 40 seconds
5°C/second max
8 minutes Max.
280°C
TP
TL
TS(max)
TS(min)
Ramp-up
Preheat
tS
25
time to peak temperature
tP
tL
Ramp-down
Time
Physical Specifications
Environmental Specifications
Terminal Finish
Body Material
Lead Material
1005 Matte Tin-plated
UL Recognized epoxy meeting
flammability classification 94v-0
Copper Alloy
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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.
Test
High Temperature
Voltage Blocking
Temperature Cycling
Biased Temperature &
Humidity
High Temp Storage
Specifications and Conditions
MIL-STD-750: Method 1040, Condition A
Rated VDRM (VAC-peak), 110°C, 1008
hours
MIL-STD-750: Method 1051
-40°C to 150°C, 15-minute dwell,
100 cycles
EIA/JEDEC: JESD22-A101
320VDC, 85°C, 85%RH, 1008 hours
MIL-STD-750: Method 1031
150°C, 1008 hours
Low-Temp Storage -40°C, 1008 hours
Thermal Shock
Autoclave
(Pressure Cooker Test)
MIL-STD-750: Method 1056
0°C to 100°C, 5-minute dwell,
10-second transfer, 10 cycles
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
Q6012LTH1LED Series
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.
datasheet pdf - http://www.DataSheet4U.net/