BTA12, BTB12, T12xx 
 
 
12 A Snubberless, logic level and standard Triacs 
Datasheet - production data 
 
Applications 
ON/OFF or phase angle function in applications 
such as static relays, light dimmers and 
appliance motors speed controllers. 
The Snubberless versions (BTA/BTB...W and 
T12 series) are especially recommended for use 
on inductive loads, because of their high 
commutation performance. The BTA series 
provide an insulated tab (rated at 2500 VRMS). 
Description 
Available either in through-hole or surface mount 
packages, the BTA12, BTB12 and T12xx Triac 
series are suitable for general purpose mains 
power AC switching. 
Table 1: Device summary 
Symbol T12xx BTA12 BTB12 
I 12 12 12 
T(RMS)
VDRM/VRRM 600/800 
 
I (Snubberless) 5/10/35/50 
GT
IGT(standard) - 25/50 
Features 
 
 Medium current Triac 
 Low thermal resistance with clip bonding 
 Low thermal resistance insulation ceramic 
for insulated BTA 
 High commutation (4Q) or very high 
commutation (3Q) capability 
 BTA series UL1557 certified (file ref: 81734) 
 Packages are RoHS (2002/95/EC) compliant 
February 2017 DocID7473 Rev 10 1/13 
www.st.com 
This is information on a product in full production. 
  BTA12, BTB12, T12xx 
 
1 Characteristics 
Table 2: Absolute maximum ratings 
Symbol Parameter Value Unit 
IPAK / DPAK / 
T = 105 C 
c
TO-220AB 
IT(RMS) RMS on-state current (full sine wave) 12 A 
TO-220AB Ins. T = 90 C 
c
F = 50 Hz tp = 20 ms 120 
Non repetitive surge peak on-state current 
I A 
TSM
(full cycle, Tj initial = 25 C) 
F = 60 Hz t = 16.7 ms 126 
p
2 2 2
I t I t value for fusing tp = 10 ms 78 A s 
Critical rate of rise of on-state current  
dl/dt F = 120 Hz Tj = 125 C 50 A/s 
I = 2 x I , t  100 ns 
G GT r
VDRM/VRRM + 
V /V Non repetitive surge peak off-state voltage t = 10 ms T = 25 C V 
DSM RSM p j
100 
I Peak gate current t = 20 s T = 125 C 4 A 
GM p j
PG(AV) Average gate power dissipation Tj = 125 C 1 W 
T Storage junction temperature range -40 to +150 C 
stg
Tj Operating junction temperature range  -40 to +125 C 
 
Table 3: Electrical characteristics (Tj = 25 C, unless otherwise specified) -  
Snubberless and logic level Triac (3 quadrants) 
T1205 T1210 T1235 T1250 
Symbol Parameter Quadrant BTB12-TW BTB12-SW BTB12-CW BTB12-BW Unit 
 
BTA12-TW BTA12-SW BTA12-CW BTA12-BW 
(1)
IGT Max. 5 10 35 50 mA 
V = 12 V,  
D
R = 30  
L
VGT Max. 1.3 V 
I - II - III 
V = V ,  
D DRM
V R = 3.3 k,  Min. 0.2 V 
GD L
T = 125 C 
j
I - III 10 25 50 70 
I I = 1.2 x I Max. mA 
L G GT
II 15 30 60 80 
(2)
IH I = 100 mA Max. 10 15 35 50 mA 
TM
VD = 67 % VDRM  
(2)
dV/dt Min. 20 40 500 1000 V/s 
gate open, 125 C 
(dV/dt)c = 0.1 V/s, 125 C 3.5 6.5 
 
 
(2)
(dI/dt)c (dV/dt)c = 10 V/s, 125 C Min. 1 2.9 A/ms 
 
 
Without snubber, 125 C 6.5 12 
  
 
Notes: 
(1)
Minimum IGT is guaranteed at 5% of IGT max. 
(2)
For both polarities of A2 referenced to A1 
 
2/13 DocID7473 Rev 10