UTC BT138 TRIAC
UTC UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R401-002,A
TRIACS LOGIC LEVEL
DESCRIPTION
Passivated triacs in a plastic envelope, intended for use in
applications requiring high bidirectional transient and blocking
voltage capability and high thermal cycling performance. Typical
applications include motor control, industrial and domestic
lighting, heating voltages and static switching.
SYMBOL
MT2
MT1
G
TO-220
1
1:MT1 2:MT2 3:GATE
ABSOLUTE MAXIMUM RATINGS ( Tj=25°C)
PARAMETER SYMBOL RATING UNIT
Repetitive Peak Off State Voltage
BT138-600
BT138-800
VDRM
600
800
V
RMS On-state Current (Full sine wave; Tmb≤99°C) IT(RMS) 12 A
Non-repetitive Peak. On-State Current
(Full sine wave; Tj=25°C prior to surge)
t=20ms
t=16.7ms
ITSM
95
105
A
I2t For Fusing (t=10ms) I2t 45 A2s
Repetitive Rate of Rise of On-state Current after Triggering
(ITM=20A;IG=0.2A; dIG/dt=0.2A/µs)
T2+G+
T2+G-
T2-G-
T2-G+
dIT/dt
50
50
50
10
A/µs
Peak Gate Voltage VGM 5 V
Peak Gate Current IGM 2 A
Peak Gate Power PGM 5 W
Average Gate Power PG(AV) 0.5 W
Operating Junction Temperature Tj 125 °C
Storage Temperature Tstg -40~150 °C
*Although not recommended, off-state voltages up to 800V may be applied without damage, but the triac may switch
to the on-state. The rate of rise of current should not exceed 15A/µs.
UTC BT138 TRIAC
UTC UNISONIC TECHNOLOGIES CO., LTD. 2
QW-R401-002,A
THERMAL RESISTANCES
PARAMETER SYMBOL MIN TYP MAX UNIT
Thermal Resistance, Junction to Mounting Base
Full cycle
Half cycle
Rθj-mb
1.5
2.0
°C /W
Thermal Resistance, Junciton to Ambient
In free air Rθj-a 60 - °C /W
STATIC CHARACTERISTICS (Tj=25°C,unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Gate Trigger Current
T2+G+
T2+G-
T2-G-
T2-G+
IGT
VD=12V, IT=0.1A
5
8
10
12
35
35
35
70
mA
Latching Current
T2+G+
T2+G-
T2-G-
T2-G+
IL
VD=12V, IGT =0.1A
7
20
8
10
40
60
40
60
mA
Holding Current IH VD=12V, IGT=0.1A 6 30 mA
On-State Voltage VT IT=15A 1.4 1.65 V
Gate Trigger Voltage VGT VD=12V, IT=0.1A
VD=400V, IT=0.1A, Tj=125°C
0.25
0.7
0.4
1.5
V
Off-state Leakage Current ID VD=VDRM(max) , Tj=125°C 0.1 0.5 mA
DYNAMIC CHARACTERISTICS (Tj=25°C,unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Critical Rate Of Rise Of Off-State
Voltage dVD/dt
VDM=67% VDRM(max), Tj=125°C
Exponential waveform,
Gate open circuit
100 250 V/µs
Critical Rate Of Change
Of Commutating Voltage dVcom/dt
VDM=400V,Tj=95°C, IT(RMS)=12A
dlcom/dt =5.4A/ms,
Gate open circuit
20 V/µs
Gate Controlled Turn-on Time tgt ITM=16A, VD=VDRM(max),
IG=0.1A dIG/dt=5A/µs
2 µs
UTC BT138 TRIAC
UTC UNISONIC TECHNOLOGIES CO., LTD. 3
QW-R401-002,A
TYPICAL CHARACTERISTICS
1ms
100us10us
1000
T/s
Figure 2. Maximum Permissible Non-repetitive
Peak On-state Current ITSM ,vs Pulse W idth
tp,for Sinusoidal Currents,tp≒20ms
10
100
510
0
20
5
IT(RMS)/A
Figure 1.Maximum on -state Dissipation.Ptot vs RMS
On-state Current,IT(RMS ),W hereα=conduction Angle.
15
0
15
10
10ms 100ms
100 150-50 50
0
15
5
Tmb/℃
10
0
95
117.5
102.5
125
110
Ptot/W Tmb(max)/C
α=180
α=120
α=90
α=60
α=30
α
α
Figure 4.Maximum Permissible RMS Current IT(RMS)
vs mounting baseTemperature Tmb
IT(RMS)/A
99℃
ITSM/A
ITITSM
time
Tj initial=25℃max
dIT/dt limit
T2-G+ quadrant
25
10
Surge Duration /S
15
20
5
0
Figure 5.Maximum Permissible Repetitive RMS on-state
Current IT(RMS),vs Surge Duration,for Sinusoidal
Currents,f=50Hz;Tmb≒99℃
IT(RMS)/A
0.01 0.1 1 10
100
40
Number of Cycles at 50Hz
80
60
20
0
Figure 3 .Maximum Permissible Non-Repetitive
peak on-state Current ITS M ,vs Number of Cycles,
for Sinusoidal Currents,f=50Hz
10 100
ITSM/A
11000
IT
time
ITSM
Tj initial=25℃max
100 150-50 50
0
1.6
0.8
Tj/℃
1.2
1.4
1
0.6
0.4
Figure 6.Normalised Gate Trigger Voltage VGT(Tj)/
VGT(25℃),vs Junction Temperature T j
VGT(25℃)
VGT(Tj)
T
T
UTC BT138 TRIAC
UTC UNISONIC TECHNOLOGIES CO., LTD. 4
QW-R401-002,A
1ms
0.1ms10us
0.1
tp/s
Figure 11.Transient Thermal Impedance
Zth j-mb,vs Pulse W idth tp
0.001
0.01
10ms 0.1s
1.5 201
0.5
40
VT/V
30
20
10
0
Figure 10.Typical and Maximum
On-state Characteristic
IT/A
Zth j-mb (K/W )
100 150-50 50
0
3
1
Tj/℃
2
2.5
1.5
0.5
0
Figure 7.Normalised Gate Trigger Current
IGT(Tj)/IGT(25℃),vs Junction Temperature Tj
IGT(25℃)
IGT(Tj)
T2+G+
T2+G-
T2-G-
T1-G+
typ
max
100 150-50 50
0
3
1
Tj/℃
2
2.5
1.5
0.5
0
Figure 8.Normalised Latching Current
IL(Tj)/IL(25℃),vs Junction Temperature Tj
IL(25℃)
IL(Tj)
100 150-50 50
0
3
1
Tj/℃
2
2.5
1.5
0.5
0
Figure 9.Normalised Holding Current
IH(Tj)/IH(25℃),vs Junction Temperature Tj
IH(25℃)
IH(Tj)
1s 10s
1
10
unidirectional
bidirectional
tp
t
PD
100 15050
0
1000
10
Tj/℃
100
1
Figure 12.Typical commutation dV/dt vs junction
temperature,parameter commutation dlT/dt.The triac should
commutate when the dV/dt is below the value on the
appropriate curve for pre-commutation dlT/dt
dV/dt(V/us)
2.5 3
Tj=125℃
Tj=25℃
Vo=1.75V
Rs=0.316Ohms
dIcom/dt=5.4A/ms
UTC BT138 TRIAC
UTC UNISONIC TECHNOLOGIES CO., LTD. 5
QW-R401-002,A
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
