May 2008 Rev 8 1/8
8
T2550H
High temperature 25 A Snubberless™ TRIAC
Features
■Medium current TRIAC
■150 °C max. Tj turn-off commutation
■Low thermal resistance with clip bonding
■Very high 3 quadrant commutation capability
■RoHS (2002/95/EC) compliant package
Applications
Specifically designed for use in high temperature
environment (found in hot appliances such as
cookers, ovens, hobs, electric heaters, coffee
machines).
Description
This 25 A T2550H TRIAC provides an enhanced
performance in terms of reduced power loss and
thermal dissipation. This allows for the
optimization of the heatsinking dimensions,
leading to space and cost effectivness when
compared to electro-mechanical solutions.
Based on ST snubberless technology, the
T2550H offers high commutation switching
capabilities and high noise immunity levels.
Thanks to the clip assembly technique, it provides
a superior performance in surge current handling.
Table 1. Device summary
Symbol Value Unit
IT(RMS) 25 A
VDRM/VRRM 600 V
IGT (Q1)50 mA
A2
A1
G
G
A2
A2
A1
T0-220AB
T2550H-600TRG
www.st.com
Characteristics T2550H
2/8
1 Characteristics
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
IT(RMS) RMS on-state current (full sine wave) Tc = 125 °C 25 A
ITSM
Non repetitive surge peak on-state current
(full cycle, Tj initial = 25° C)
F = 50 Hz t = 20 ms 250 A
F = 60 Hz t = 16.7 ms 260
I²tI
²t Value for fusing tp = 10 ms 340 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 700 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
IGT (1)
VD = 12 V RL = 33 Ω
I - II - III MAX. 50 mA
VGT I - II - III MAX. 1.3 V
VGD VD = VDRM RL = 3.3 kΩ Tj = 150° C I - II - III MIN. 0.15 V
IH (2) IT = 500 mA MAX. 75 mA
ILIG = 1.2 IGT I - II - III MAX. 90 mA
dV/dt(2) VD = 67% VDRM gate open Tj = 150° C MIN. 500 V/µs
(dI/dt)c(2) Without snubber Tj = 150° C MIN. 11.1 A/ms
1. minimum IGT is guaranted at 10% of IGT max.
2. for both polarities of A2 referenced to A1.
Table 4. Static Characteristics
Symbol Test Conditions Value Unit
VT (1) ITM = 35 A tp = 380 µs Tj = 25 °C MAX. 1.5 V
Vto (1) Threshold voltage Tj = 150 °C MAX. 0.80 V
Rd (1) Dynamic resistance Tj = 150 °C MAX. 19 mΩ
IDRM
IRRM
VDRM = VRRM
Tj = 25 °C
MAX.
5µA
Tj = 150 °C 8.5 mA
VDRM/VRRM = 400 V (at mains peak voltage) Tj = 150 °C 5.5
1. for both polarities of A2 referenced to A1.
T2550H Characteristics
3/8
Table 5. Thermal resistance
Symbol Parameter Value Unit
Rth(j-c) Junction to case (AC) 0.8 °C/W
Figure 1. Maximum power dissipation versus
RMS on-state current (full cycle)
Figure 2. RMS on-state current versus case
temperature (full cycle)
0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0
0
5
10
15
20
25
30
35
P(W)
I (A)
T(RMS)
0 25 50 75 100 125 150
0
5
10
15
20
25
30
I (A)
T(RMS)
T (°C)
C
Figure 3. Relative variation of thermal
impedance versus pulse duration
Figure 4. On-state characteristics (maximum
values)
1E-3 1E-2 1E-1 1E+0 1E+1 1E+2 5E+2
0.01
0.10
1.00
K=[Z /R
th th]
t (s)
p
Zth(j-c)
Zth(j-a)
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
1
10
100
300
I (A)
TM
V (V)
TM
T=
jT max.
j
T = 25°C
j.
T max.
V = 0.80V
R = 19 m
j
t0
dΩ
Figure 5. Surge peak on-state current versus
number of cycles
Figure 6. Non-repetitive surge peak on-state
current for a sinusoidal pulse with
width tp < 10 ms and corresponding
value of I2t
1 10 100 1000
0
50
100
150
200
250
300
I (A)
TSM
Number of cycles
t=20ms
One cycle
Non repetitive
T initial=25°C
j
Repetitive
T =125°C
C
100
1000
10000
0.01 0.10 1.00 10.00
Tj initial=25 °C
dI/dt limitation: 50 A/µs
I
TSM
I²t
t (ms)
p
I (A), I t (A s)
TSM 22
Characteristics T2550H
4/8
Figure 11. Acceptable repetitive peak off-state voltage versus case-ambient thermal resistance
Figure 7. Relative variation of gate trigger
current, holding current and
latching current versus junction
temperature (typical values)
Figure 8. Relative variation of critical rate of
decrease of main current versus
(dV/dt)c (typical values)
-40 -20 0 20 40 60 80 100 120 140 160
0.0
0.5
1.0
1.5
2.0
2.5
T (°C)
j
I,I,I[T] /
GT H L j I ,I ,I [T =25°C]
GT H L j
I
GT
I
H
& I
L
0.1 1.0 10.0 100.0
0.6
0.8
1.0
1.2
1.4
1.6
(dV/dt)c (V/µs)
(dI/dt)c [(dV/dt)c] / Specified (dI/dt)c
Figure 9. Relative variation of critical rate of
decrease of main current versus
junction temperature
Figure 10. Leakage current versus junction
temperature for different values of
blocking voltage (typical values)
25 50 75 100 125 150
0
1
2
3
4
5
6
7
8
(dI/dt)c [T ] / ]
j(dI/dt)c [T = 150°C
j
T (°C)
j
50 75 100 125 150
1E-3
1E-2
1E-1
1E+0
1E+1
I / I (mA)
DRM RRM
T (°C)
j
V = V = 200V
DR
V = V = 400V
DR
V = V = 600V
DR
R (°C/W)
th(c-a)
0
1
2
3
4
5
6
7
8
9
10
300 350 400 450 500 550 600
Rth(j-c)=0.8 °C/W
TJ=150 °C
V/V(V)
DRM RRM
T2550H Ordering information scheme
5/8
2 Ordering information scheme
Figure 12. Ordering information scheme
T 25 50 H - 600 T RG
Triac series
Sensitivity
Voltage
Package
Packing mode
Current
Temperature
25 = 25 A
H = High
50 = 50 mA
600 = 600 V
T = TO-220AB
RG = Tube
Package information T2550H
6/8
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 ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at www.st.com.
Table 6. TO-220AB 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
T2550H Ordering information
7/8
4 Ordering information
5 Revision history
Table 7. Ordering information
Order code Marking Package Weight Base qty Delivery mode
T2550H-600TRG T2550H600T TO-220AB 2.3 g 50 Tube
Table 8. Document revision history
Date Revision Changes
Apr-2002 5A Last update.
13-Feb-2006 6 TO-220AB delivery mode changed from bulk to tube.
ECOPACK statement added.
20-Jun-2006 7 Reformatted to current standards. Figures 6 and 11 replaced.
27-May-2008 8 Reformatted to current standards. ECOPACK statement updated.
T2550H
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