
1/9
BTA/BTB24, BTA25, BTA26
and T25 Series
SNUBBERLESS & STANDARD 25A TRIACS
September 2000 - Ed: 3
MAIN FEATURES:
DESCRIPTION
Available either inthrough-hole of surfaceand T25
mount packages, the BTA/BTB24-25-26 triac
series is suitable for general purpose AC power
switching. They can be used as an ON/OFF
function in applications such as static relays,
heating regulation, water heaters,induction motor
starting circuits...or for phase control operation in
high power motor speed controllers, soft start
circuits...The snubberless versions (BTA/BTB...W
and T25 series) are specially recommended for
use on inductive loads, thanks to their high
commutation performances.
By using an internal ceramic pad, the BTA series
provides voltage insulated tab(rated at2500V
RMS) complying with UL standards (File ref.:
E81734).
Symbol Value Unit
I
T(RMS)
25 A
V
DRM/VRRM
600 and 800 V
I
GT (Q1)
35 to 50 mA
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
I
T(RMS)
RMS on-state current (full sine wave)
D
PAK
TO-220AB
Tc = 100°C
25
A
RD91
TOP3 Ins.
Tc = 90°C
TO-220AB Ins. Tc = 75°C
I
TSM
Non repetitive surge peak on-state
current (full cycle, Tj initial = 25°C)
F = 60 Hz t = 16.7 ms 260 A
F = 50 Hz t = 20 ms 250
I
tI
t Value for fusing
tp = 10 ms 450
A
s
dI/dt
Critical rate of rise of on-state current
I
G
=2xIGT,tr≤100 ns
F = 120 Hz Tj = 125°C50 A/µs
V
DSM/VRSM
Non repetitive surge peak off-state
voltage
tp = 10 ms Tj = 25°C
V
DRM/VRRM
+ 100
V
I
GM
Peak gate current tp = 20 µs Tj = 125°C4 A
P
G(AV)
Average gate power dissipation Tj = 125°C1 W
T
stg
T
j
Storage junction temperature range
Operating junction temperature range
- 40 to + 150
- 40 to + 125
°C
G
A2
A1
G
A2
A2
A1
G
A2
A2
A1
TO-220AB
(BTB24)
TO-220AB
Insulated
(BTA24)
TOP3
Insulated
(BTA26)
A1
A2
G
A2
A2
G
A1
A2
A1
G
D2PAK
(T25G)
RD91
(BTA25)

BTA/BTB24, BTA25, BTA26 and T25 Series
2/9
ELECTRICAL CHARACTERISTICS (Tj = 25°C, unless otherwise specified)
■ SNUBBERLESS (3 Quadrants) T25-G, BTA/BTB24...W, BTA25...W, BTA26...W
■ STANDARD (4 Quadrants): BTA25...B, BTA26...B
STATIC CHARACTERISTICS
Note 1:minimum IGT is guaranted at 5% of IGT max.
Note 2:for both polarities of A2 referenced to A1
Symbol Test Conditions Quadrant T25 BTA/BTB
Unit
T2535 CW BW
I
GT
(1)
V
D
=12V RL=33Ω
I - II - III MAX. 35 35 50
mA
V
GT
I - II - III MAX. 1.3 V
V
GD
VD=V
DRMRL
= 3.3 kΩ Tj = 125°C
I - II - III MIN. 0.2
V
IH(2)
I
T
= 500 mA
MAX. 50 50 75 mA
I
L
IG= 1.2 I
GT
I - III MAX. 70 70 80 mA
II 80 80 100
dV/dt (2) V
D
=67%V
DRM
gate open Tj = 125°C
MIN. 500 500 1000 V/µs
(dI/dt)c (2) Without snubber Tj = 125°C MIN. 13 13 22 A/ms
Symbol Test Conditions Quadrant Value Unit
I
GT
(1)
V
D
=12V RL=33Ω
I-II-III
IV
MAX.
50
100
mA
V
GT
ALL MAX. 1.3 V
V
GD
VD=V
DRMRL
= 3.3 kΩ Tj = 125°C
ALL MIN.
0.2 V
IH(2)
I
T
= 500 mA
MAX. 80 mA
I
L
IG= 1.2 I
GT
I - III - IV MAX. 70 mA
II 160
dV/dt (2) V
D
=67%V
DRM
gate open Tj = 125°C
MIN. 500 V/µs
(dV/dt)c (2) (dI/dt)c = 13.3 A/ms Tj = 125°C MIN. 10 V/µs
Symbol Test Conditions Value Unit
V
TM
(2)
I
TM
=35A tp=380µs
Tj = 25°C MAX. 1.55 V
V
to
(2)
Threshold voltage Tj = 125°C MAX. 0.85 V
Rd(2)
Dynamic resistance Tj = 125°C MAX. 16 mΩ
I
DRM
I
RRM
V
DRM=VRRM
Tj = 25°C
MAX.
5 µA
Tj = 125°C3mA

BTA/BTB24, BTA25, BTA26 and T25 Series
3/9
THERMAL RESISTANCES
S: Copper surface under tab
PRODUCT SELECTOR
BTB: Non insulated TO-220AB package
ORDERING INFORMATION
Symbol Parameter Value Unit
R
th(j-c)
Junction to case (AC)
D
PAK
TO-220AB
0.8
°C/W
RD91 (Insulated)
TOP3 Insulated
1.1
TO-220AB Insulated 1.7
R
th(j-a)
Junction to ambient
S=1cm
D PAK
45
°C/W
TOP3 Insulated 50
TO-220AB
60
TO-220AB Insulated
Part Number
Voltage (xxx)
Sensitivity Type
Package
600 V 800 V
BTB24-xxxB X X 50 mA Standard TO-220AB
BTA/BTB24-xxxBW X X 50 mA Snubberless TO-220AB
BTA/BTB24-xxxCW X X 35 mA Snubberless TO-220AB
BTA25-xxxB X X 50 mA Standard RD-91
BTA25-xxxBW X X 50 mA Snubberless RD-91
BTA25-xxxCW X X 35 mA Snubberless RD-91
BTA26-xxxB X X 50 mA Standard TOP3 Ins.
BTA26-xxxBW X X 50 mA Snubberless TOP3 Ins.
BTA26-xxxCW X X 35 mA Snubberless TOP3 Ins.
T2535-xxxG X X 35 mA Snubberless
D
PAK
BT A 24 - 600 BW
TRIAC
SERIES
INSULATION:
A: insulated
B: non insulated
CURRENT:
24: 25A in TO-220AB
25: 25A in Rd91
26: 25A in TOP3
SENSITIVITY &TYPE
B: 50mASTANDARD
BW: 50mASNUBBERLESS
CW: 35mASNUBBERLESS
VOLTAGE:
600: 600V
800: 800V

BTA/BTB24, BTA25, BTA26 and T25 Series
4/9
OTHER INFORMATION
Note: xxx= voltage, y= sensitivity, z= type
Part Number Marking Weight
Base
quantity
Packing
mode
BTA/BTB24-xxxyz BTA/BTB24xxxyz 2.3 g 250 Bulk
BTA25-xxxyz BTA25xxxyz 20 g 25 Bulk
BTA26-xxxyz BTA26xxxyz 4.5 g 120 Bulk
T2535-xxxG T2535xxxG 1.5 g 50 Tube
T2535-xxxG-TR T2535xxxG 1.5 g 1000 Tape& reel
T 25 35 - 600 G (-TR)
TRIAC
SERIES
SENSITIVITY:
35: 35mA
VOLTAGE:
600: 600V
800: 800V
CURRENT:25A
PACKAGE:
G: D PAK
2
PACKING MODE:
Blank:Tube
-TR:Tape & Reel

BTA/BTB24, BTA25, BTA26 and T25 Series
5/9
Fig. 1: Maximum power dissipation versus RMS
on-state current (full cycle).
Fig. 2-1: RMS on-state current versus case
temperature (full cycle).
Fig. 2-2: D PAK RMS on-state current versus
ambient temperature (printed circuit board FR4,
copper thickness: 35 µm), full cycle.
Fig. 3: Relative variation of t hermal impedance
versus pulse duration.
Fig. 4: On-state characteristics (maximum
values).
Fig. 5: Surge peak on-state current versus
number of cycles.
0 5 10 15 20 25
0
5
10
15
20
25
30
IT(RMS) (A)
P (W)
0 25 50 75 100 125
0
5
10
15
20
25
30
Tc(°C)
IT(RMS) (A)
BTA24
BTB/T25
BTA25/26
0 25 50 75 100 125
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Tamb(°C)
IT(RMS) (A)
DPAK
(S=1cm )
2
2
1E-3 1E-2 1E-1 1E+0 1E+1 1E+2 5E+2
1E-3
1E-2
1E-1
1E+0
tp (s)
K=[Zth/Rth]
Zth(j-c)
Zth(j-a)
BTA/BTB24/T25
Zth(j-a)
BTA26
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
1
10
100
300
VTM (V)
ITM (A)
Tj=25°C
Tj max
Tj max.
Vto = 0.85 V
Rd = 16 mΩ
1 10 100 1000
0
50
100
150
200
250
300
Number ofcycles
ITSM (A)
Non repetitive
Tj initial=25°C
Repetitive
Tc=75°C
One cycle
t=20ms

BTA/BTB24, BTA25, BTA26 and T25 Series
6/9
Fig. 6: Non-repetitive surge peak on-state
current for a sinusoidal pulse with width
tp < 10ms, and corresponding valueof I t.
Fig. 7: Relative variation of gate trigger current,
holding current and latching current versus
junction temperature (typical values).
Fig. 8: Relative variation of crit ical rate of
decrease of m ain current versus (dV/dt)c (typica l
values).
Fig. 9: Relative variation of crit ical rate of
decrease of main current versus junction
temperature.
Fig. 10: D PAK Thermal resistance junction to
ambient versuscopper surface under tab (printed
circuit board FR4, copper thickness:35 µm).
0.01 0.10 1.00 10.00
100
1000
3000
tp (ms)
ITSM (A),
I t
(A s)
Tj initial=25°C
ITSM
I t
dI/dt limitation:
50A/µs
-40 -20 0 20 40 60 80 100 120 140
0.0
0.5
1.0
1.5
2.0
2.5
Tj(°C)
IGT,IH,IL[Tj]/ IGT,IH,IL[Tj=25°C]
IGT
IH & IL
0.1 1.0 10.0 100.0
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
(dV/dt)c (V/µs)
(dI/dt)c [(dV/dt)c] / Specified (dI/dt)c
BW/CW/T2535
B
0 25 50 75 100 125
0
1
2
3
4
5
6
Tj (°C)
(dI/dt)c [Tj] / (dI/dt)c [Tj specified]
0 4 8 1216202428323640
0
10
20
30
40
50
60
70
80
S(cm )
Rth(j-a) (°C/W)
D PAK

BTA/BTB24, BTA25, BTA26 and T25 Series
7/9
PACKAGE MECHANICAL DATA
D PAK (Plastic)
REF.
DIMENSIONS
Millim eters Inches
Min . Typ. Max. M in. 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 15.8 5 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°
A
C2
D
R
2.0 MIN.
FLAT ZONE
A2
V2
C
A1
G
L
L3
L2
B
B2
E
FOOTPRINT DIMENSIONS (in millimeters)
D PAK (Plastic)
8.90
3.70
1.30
5.08
16.90
10.30

BTA/BTB24, BTA25, BTA26 and T25 Series
8/9
PACKAGE MECHANICAL DATA
RD91 (Plastic)
REF.
DIMENSIONS
Millimeters Inches
Min. Max. Min. Max.
A 40.00 1.575
A1 29.90 30.30 1.177 1.193
A2 22.00 0.867
B 27.00 1.063
B1 13.50 16.50 0.531 0.650
B2 24.00 0.945
C 14.00 0.551
C1 3.50 0.138
C2 1.95 3.00 0.077 0.118
E3 0.70 0.90 0.027 0.035
F 4.00 4.50 0.157 0.177
I 11.20 13.60 0.441 0.535
L1 3.10 3.50 0.122 0.138
L2 1.70 1.90 0.067 0.075
N1 33° 43° 33° 43°
N2 28° 38° 28° 38°
A2
L2 L1
B2
C
C2
A1
C1
B1
N1
B
F
I
A
E3
N2
PACKAGE MECHANICAL DATA
TOP3 (Plastic)
REF.
DIMENSIONS
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 4.4 4.6 0.173 0.181
B 1.45 1.55 0.057 0.061
C 14.35 15.60 0.565 0.614
D 0.5 0.7 0.020 0.028
E 2.7 2.9 0.106 0.114
F 15.8 16.5 0.622 0.650
G 20.4 21.1 0.815 0.831
H 15.1 15.5 0.594 0.610
J 5.4 5.65 0.213 0.222
K 3.4 3.65 0.134 0.144
L 4.08 4.17 0.161 0.164
P 1.20 1.40 0.047 0.055
R 4.60 0.181

BTA/BTB24, BTA25, BTA26 and T25 Series
9/9
PACKAGE MECHANICAL DATA
TO-220AB (Plastic)
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
I 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
M 2.60 0.102
M
B
l4
C
b2
a2
l2
c2
l3
b1
a1
A
F
L
I
e
c1
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