September 2011 Doc ID 13574 Rev 2 1/10
10
T1235H, T1250H
High temperature 12 A Snubberless™ Triacs
Features
■Medium current Triac
■150 °C max. Tj turn-off commutation
■Low thermal resistance with clip bonding
■Very high 3 quadrant commutation capability
■Packages are RoHS (2002/95/EC) compliant
■UL certified (ref. file E81734)
Applications
Especially designed to operate in high power
density or universal motor applications such as
vacuum cleaner and washing machine drum
motor, these 12 A Triacs provide a very high
switching capability up to junction temperatures of
150 °C.
The heatsink can be reduced, compared to
traditional Triacs, according to the high
performance at given junction temperatures.
Description
Available in through-hole or surface mount
packages, the T1235H and T1250H Triac series
are suitable for general purpose mains power ac
switching.
By using an internal ceramic pad, the T12xxH-6I
provides voltage insulation (rated at 2500 V rms).
TM: Snubberless is a trademark of STMicroelectronics
Table 1. Device summary
Symbol Value Unit
IT(RMS) 12 A
VDRM/VRRM 600 V
IGT 35 or 50 mA
A2
A1
G
A2
A2
A1
G
A2
A2
A1
G
A2
A1
G
D2PAK
T12xxH-6G
TO-220AB
T12xxH-6T
TO-220AB Insulated
T12xxH-6I
www.st.com
Characteristics T1235H, T1250H
2/10 Doc ID 13574 Rev 2
1 Characteristics
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
IT(RMS) On-state rms current (full sine wave) D2PAK, TO-220AB Tc = 130 °C 12 A
TO-220AB Ins Tc = 120 °C
ITSM
Non repetitive surge peak on-state
current (full cycle, Tj initial = 25 °C)
F = 50 Hz t = 20 ms 120 A
F = 60 Hz t = 16.7 ms 126
I²tI
²t Value for fusing tp = 10 ms 95 A2s
dI/dt Critical rate of rise of on-state current
IG = 2 x IGT , tr ≤ 100 ns F = 120 Hz Tj = 150 °C 50 A/µs
VDSM/VRSM
Non repetitive surge peak off-state
voltage tp = 10 ms Tj = 25 °C VDRM/VRRM
+ 100 V
IGM Peak gate current tp = 20 µs Tj = 150 °C 4 A
PG(AV) Average gate power dissipation Tj = 150 °C 1 W
Tstg
Tj
Storage junction temperature range
Operating junction temperature range
- 40 to + 150
- 40 to + 150 °C
Table 3. Electrical characteristics (Tj = 25 °C, unless otherwise specified)
Symbol Test conditions Quadrant
Value
Unit
T1235H T1250H
IGT (1)
VD = 12 V, RL = 33 Ω
I - II - III MAX. 35 50 mA
VGT I - II - III MAX. 1.0 V
VGD VD = VDRM, RL = 3.3 kΩI - II - III MIN. 0.15 V
IH (2) IT = 500 mA MAX. 35 75 mA
ILIG = 1.2 IGT
I - III MAX. 50 90 mA
II 80 110
dV/dt (2) VD = 67% VDRM, gate open, Tj = 150 °C MIN. 1000 1500 V/µs
(dI/dt)c (2) Without snubber, Tj = 150 °C MIN. 16 21 A/ms
1. minimum IGT is guaranted at 20% of IGT max.
2. for both polarities of A2 referenced to A1.
T1235H, T1250H Characteristics
Doc ID 13574 Rev 2 3/10
Table 4. Static characteristics
Symbol Test conditions Value Unit
VT (1) ITM = 17 A, tp = 380 µs Tj = 25 °C MAX. 1.5 V
Vt0 (1) Threshold voltage Tj = 150 °C MAX. 0.80 V
Rd (1) Dynamic resistance Tj = 150 °C MAX. 30 mΩ
IDRM
IRRM (2)
VDRM = VRRM
Tj = 25 °C MAX. 5 µA
Tj = 150 °C MAX. 3.9
mAVD/VR = 400 V (at peak mains voltage) Tj = 150 °C MAX. 3.2
VD/VR = 200 V (at peak mains voltage) Tj = 150 °C MAX. 2.7
1. for both polarities of A2 referenced to A1
2. tp = 380 µs
Table 5. Thermal resistance
Symbol Parameter Value Unit
Rth(j-c) Junction to case (AC) D2PAK / TO-220AB 1.4
°C/W
TO-220AB Ins 3.3
Rth(j-a) Junction to ambient S = 1 cm2D2PA K 4 5
TO-220AB / TO-220AB Ins 60
Characteristics T1235H, T1250H
4/10 Doc ID 13574 Rev 2
Figure 1. Maximum power dissipation versus
on-state rms current (full cycle)
Figure 2. On-state rms current versus case
temperature (full cycle)
0
2
4
6
8
10
12
14
0123456789101112
P(W)
α=180 °
180°
IT(RMS)(A)
I
T(RMS)
(A)
0
2
4
6
8
10
12
14
0 25 50 75 100 125 150
α=180 °
TO-220AB
Insulated
TO-220AB/D²PAK
T
C
(°C)
Figure 3. On-state rms current versus
ambient temperature
Figure 4. Variation of thermal impedance
versus pulse duration
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0 25 50 75 100 125 150
I
T(RMS)
(A)
α=180 °
D²PAK
SCU=1 cm²
T
amb
(°C)
Epoxy printed circuit board FR4,
copper thickness = 35 µm
1.0E-01
1.0E+00
1.0E+01
1.0E+02
1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03
Z
th
(°C/W)
Zth(j-a)
Zth(j-c)
tP(s)
Figure 5. On-state characteristics
(maximum values)
Figure 6. Surge peak on-state current versus
number of cycles
1
10
100
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
I
TM
(A)
Tj=25 °C
Tj=150 °C
Tjmax. :
Vt0 = 0.80 V
Rd= 30 mΩ
VTM(V)
0
10
20
30
40
50
60
70
80
90
100
110
120
130
1 10 100 1000
I
TSM
(A)
Non repetitive
Tjinitial=25 °C
Repetitive
Tc=120 °C
One cycle
t=20ms
Number of cycles
T1235H, T1250H Characteristics
Doc ID 13574 Rev 2 5/10
Figure 7. Non-repetitive surge peak on-state
current for a sinusoidal pulse with
Figure 8. Relative variation of IGT,IH, IL vs
junction temperature
(typical values)
10
100
1000
10000
0.01 0.10 1.00 10.00
I
TSM
(A), I²t (A²s)
Tj initial=25 °C
dI/dt limitation: 50 A/µs
ITSM
I²t
tP(ms)
width t < 10 ms and corresponding value of I t
p
2
0.0
0.5
1.0
1.5
2.0
2.5
-40 -20 0 20 40 60 80 100 120 140 160
I
GT
,I
H
,I
L
[T
j
]/I
GT
,I
H
,I
L
[T
j
=25°C]
IGT
IH& IL
Tj(°C)
Figure 9. Relative variation of critical rate of
decrease of main current (dI/dt)c
versus reapplied (dV/dt)c
Figure 10. Relative variation of critical rate of
decrease of main current versus
junction temperature
Figure 11. Leakage current versus junction
temperature for different values of
blocking voltage (typical values)
Figure 12. Variation of thermal resistance
junction to ambient versus copper
surface under tab
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.1 1.0 10.0 100.0
(dI/dt)
c
[(dV/dt)
c
] / Specified (dI/dt)
c
(dV/dt)
C
(V/µs)
typical values
0
1
2
3
4
5
6
7
8
25 50 75 100 125 150
(dI/dt)
c
[T
j
] / (dI/dt)
c
[T
j
=150°C]
Tj(°C)
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
50 75 100 125 150
I
DRM
/I
RRM
(µA)
VDRM=VRRM=400 VVDRM=VRRM=400 V
VDRM=VRRM=600 VVDRM=VRRM=600 V
VDRM=VRRM=200 VVDRM=VRRM=200 V
Tj(°C)
0
10
20
30
40
50
60
70
80
0 5 10 15 20 25 30 35 40
R
th(j-a)
(°C/W)
D²PAK
SCU(cm²)
Epoxy printed circuit board FR4,
copper thickness = 35 µm
Ordering information scheme T1235H, T1250H
6/10 Doc ID 13574 Rev 2
2 Ordering information scheme
Figure 13. Ordering information scheme
T 12 xx H - 6 y -TR
Triac series
Current
Sensitivity
Package
12 = 12 A
35 = 35 mA
50 = 50 mA
G = D2PA K
High temperature
Voltage
Packing
6 = 600 V
T = TO-220AB
I = TO-220AB Ins
Blank = Tube (D2PAK, TO-220AB)
-TR = Tape and reel (D2PAK)
T1235H, T1250H Package information
Doc ID 13574 Rev 2 7/10
3 Package information
●Epoxy meets UL94, V0
●Recommended torque 0.4 to 0.6 N·m
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 14. Footprint (dimensions in mm)
Table 6. D2PAK dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 4.30 4.60 0.169 0.181
A1 2.49 2.69 0.098 0.106
A2 0.03 0.23 0.001 0.009
B 0.70 0.93 0.027 0.037
B2 1.25 1.40 0.048 0.055
C 0.45 0.60 0.017 0.024
C2 1.21 1.36 0.047 0.054
D 8.95 9.35 0.352 0.368
E 10.00 10.28 0.393 0.405
G 4.88 5.28 0.192 0.208
L 15.00 15.85 0.590 0.624
L2 1.27 1.40 0.050 0.055
L3 1.40 1.75 0.055 0.069
R 0.40 0.016
V2 0° 8° 0° 8°
G
L
L3
L2
B
B2
E
2mm min.
FLAT ZONE
A
C2
D
R
A2
V2
C
A1
16.90
10.30
8.90 3.70
5.08
1.30
Package information T1235H, T1250H
8/10 Doc ID 13574 Rev 2
Table 7. TO-220AB and TO-220AB Ins dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 15.20 15.90 0.598 0.625
a1 3.75 0.147
a2 13.00 14.00 0.511 0.551
B 10.00 10.40 0.393 0.409
b1 0.61 0.88 0.024 0.034
b2 1.23 1.32 0.048 0.051
C 4.40 4.60 0.173 0.181
c1 0.49 0.70 0.019 0.027
c2 2.40 2.72 0.094 0.107
e 2.40 2.70 0.094 0.106
F 6.20 6.60 0.244 0.259
ØI 3.75 3.85 0.147 0.151
I4 15.80 16.40 16.80 0.622 0.646 0.661
L 2.65 2.95 0.104 0.116
l2 1.14 1.70 0.044 0.066
l3 1.14 1.70 0.044 0.066
M2.60 0.102
C
b2
c2
F
Ø I
L
A
a1
a2
B
e
b1
I4
l3
l2
c1
M
T1235H, T1250H Ordering information
Doc ID 13574 Rev 2 9/10
4 Ordering information
5 Revision history
Table 8. Ordering information
Order code Marking Package Weight Base qty Delivery mode
T12xxH-6G T12xxH 6G D2PAK 1.5 g 50 Tube
T12xxH-6G-TR T12xxH 6G D2PAK 1.5 g 1000 Tape and reel
T12xxH-6T T12xxH 6T TO-220AB 2.3 g 50 Tube
T12xxH-6I T12xxH 6I TO-220AB Ins 2.3 g 50 Tube
Table 9. Document revision history
Date Revision Changes
17-Apr-2007 1 First issue.
20-Sep-2011 2 Updated: Features, Description and Figure 2.
T1235H, T1250H
10/10 Doc ID 13574 Rev 2
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