Philips Semiconductors
Product specification
Triacs
BT138B series
GENERAL DESCRIPTION
Glass passivated triacs in a plastic
envelope suitable for surface
mounting, 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 and static switching.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
BT138B-
BT138B-
BT138B-
Repetitive peak off-state
voltages
RMS on-state current
Non-repetitive peak on-state
current
MAX. MAX. MAX. UNIT
500
500F
500G
500
12
95
600
600F
600G
600
12
95
800
800F
800G
800
12
95
V
DRM
I
T(RMS)
I
TSM
V
A
A
PINNING - SOT404
PIN
1
2
3
mb
DESCRIPTION
main terminal 1
main terminal 2
gate
main terminal 2
PIN CONFIGURATION
mb
SYMBOL
T2
2
1
3
T1
G
LIMITING VALUES
Limiting values in accordance with the Absolute Maximum System (IEC 134).
SYMBOL
V
DRM
I
T(RMS)
I
TSM
PARAMETER
Repetitive peak off-state
voltages
RMS on-state current
Non-repetitive peak
on-state current
I
2
t for fusing
Repetitive rate of rise of
on-state current after
triggering
full sine wave; T
mb
≤
99 ˚C
full sine wave; T
j
= 25 ˚C prior to
surge
t = 20 ms
t = 16.7 ms
t = 10 ms
I
TM
= 20 A; I
G
= 0.2 A;
dI
G
/dt = 0.2 A/µs
T2+ G+
T2+ G-
T2- G-
T2- G+
CONDITIONS
MIN.
-
-
-
-
-
-
-
-
-
-
-
-
-
-40
-
-500
500
1
MAX.
-600
600
1
12
95
105
45
50
50
50
10
2
5
5
0.5
150
125
-800
800
UNIT
V
A
A
A
A
2
s
A/µs
A/µs
A/µs
A/µs
A
V
W
W
˚C
˚C
I
2
t
dI
T
/dt
I
GM
V
GM
P
GM
P
G(AV)
T
stg
T
j
Peak gate current
Peak gate voltage
Peak gate power
Average gate power
Storage temperature
Operating junction
temperature
over any 20 ms period
1
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 15 A/µs.
October 1997
1
Rev 1.200
Philips Semiconductors
Product specification
Triacs
BT138B series
THERMAL RESISTANCES
SYMBOL
R
th j-mb
R
th j-a
PARAMETER
CONDITIONS
MIN.
-
-
-
TYP.
-
-
55
MAX.
1.5
2.0
-
UNIT
K/W
K/W
K/W
Thermal resistance
full cycle
junction to mounting base half cycle
Thermal resistance
minimum footprint, FR4 board
junction to ambient
STATIC CHARACTERISTICS
T
j
= 25 ˚C unless otherwise stated
SYMBOL
I
GT
PARAMETER
Gate trigger current
CONDITIONS
BT138B-
V
D
= 12 V; I
T
= 0.1 A
T2+ G+
T2+ G-
T2- G-
T2- G+
V
D
= 12 V; I
GT
= 0.1 A
T2+ G+
T2+ G-
T2- G-
T2- G+
V
D
= 12 V; I
GT
= 0.1 A
I
T
= 15 A
V
D
= 12 V; I
T
= 0.1 A
V
D
= 400 V; I
T
= 0.1 A;
T
j
= 125 ˚C
V
D
= V
DRM(max)
;
T
j
= 125 ˚C
MIN.
TYP.
...
-
-
-
-
-
-
-
-
-
-
-
0.25
-
5
8
10
22
7
20
8
10
6
1.4
0.7
0.4
0.1
35
35
35
70
40
60
40
60
30
MAX.
...F
25
25
25
70
40
60
40
60
30
1.65
1.5
-
0.5
...G
50
50
50
100
60
90
60
90
60
mA
mA
mA
mA
mA
mA
mA
mA
mA
V
V
V
mA
UNIT
I
L
Latching current
I
H
V
T
V
GT
I
D
Holding current
On-state voltage
Gate trigger voltage
Off-state leakage current
DYNAMIC CHARACTERISTICS
T
j
= 25 ˚C unless otherwise stated
SYMBOL
dV
D
/dt
PARAMETER
Critical rate of rise of
off-state voltage
Critical rate of change of
commutating voltage
Gate controlled turn-on
time
CONDITIONS
BT138B-
V
DM
= 67% V
DRM(max)
;
T
j
= 125 ˚C; exponential
waveform; gate open
circuit
V
DM
= 400 V; T
j
= 95 ˚C;
I
T(RMS)
= 12 A;
dI
com
/dt = 5.4 A/ms; gate
open circuit
I
TM
= 16 A; V
D
= V
DRM(max)
;
I
G
= 0.1 A; dI
G
/dt = 5 A/µs
...
100
MIN.
...F
50
...G
200
TYP.
250
MAX.
-
UNIT
V/µs
dV
com
/dt
-
-
10
20
-
V/µs
t
gt
-
-
-
2
-
µs
October 1997
2
Rev 1.200
Philips Semiconductors
Product specification
Triacs
BT138B series
20
Ptot / W
BT138
Tmb(max) / C
95
= 180
15
IT(RMS) / A
BT138
15
1
120
90
60
99 C
102.5
10
110
10
30
5
5
117.5
0
0
5
IT(RMS) / A
10
125
15
0
-50
0
50
Tmb / C
100
150
Fig.1. Maximum on-state dissipation, P
tot
, versus rms
on-state current, I
T(RMS)
, where
α
= conduction angle.
BT138
Fig.4. Maximum permissible rms current I
T(RMS)
,
versus mounting base temperature T
mb
.
1000
ITSM / A
25
IT(RMS) / A
BT138
20
15
100
dI
T
/dt limit
T2- G+ quadrant
IT
T
10
10us
I TSM
time
10
5
Tj initial = 25 C max
100us
1ms
T/s
10ms
100ms
0
0.01
0.1
1
surge duration / s
10
Fig.2. Maximum permissible non-repetitive peak
on-state current I
TSM
, versus pulse width t
p
, for
sinusoidal currents, t
p
≤
20ms.
ITSM / A
BT138
IT
80
T
ITSM
time
Fig.5. Maximum permissible repetitive rms on-state
current I
T(RMS)
, versus surge duration, for sinusoidal
currents, f = 50 Hz; T
mb
≤
99˚C.
VGT(Tj)
VGT(25 C)
100
1.6
1.4
1.2
1
BT136
Tj initial = 25 C max
60
40
0.8
20
0.6
0.4
-50
0
1
10
100
Number of cycles at 50Hz
1000
0
50
Tj / C
100
150
Fig.3. Maximum permissible non-repetitive peak
on-state current I
TSM
, versus number of cycles, for
sinusoidal currents, f = 50 Hz.
Fig.6. Normalised gate trigger voltage
V
GT
(T
j
)/ V
GT
(25˚C), versus junction temperature T
j
.
October 1997
3
Rev 1.200
Philips Semiconductors
Product specification
Triacs
BT138B series
3
2.5
2
1.5
1
IGT(Tj)
IGT(25 C)
BT138
T2+ G+
T2+ G-
T2- G-
T2- G+
40
IT / A
Tj = 125 C
Tj = 25 C
BT138
typ
max
30
Vo = 1.175 V
Rs = 0.0316 Ohms
20
10
0.5
0
-50
0
0
50
Tj / C
100
150
0
0.5
1
1.5
VT / V
2
2.5
3
Fig.7. Normalised gate trigger current
I
GT
(T
j
)/ I
GT
(25˚C), versus junction temperature T
j
.
IL(Tj)
IL(25 C)
Fig.10. Typical and maximum on-state characteristic.
3
2.5
2
1.5
1
TRIAC
10
Zth j-mb (K/W)
BT138
1
unidirectional
bidirectional
0.1
P
D
tp
0.01
0.5
0
-50
0.001
10us
0.1ms
1ms
10ms
tp / s
0.1s
1s
t
0
50
Tj / C
100
150
10s
Fig.8. Normalised latching current I
L
(T
j
)/ I
L
(25˚C),
versus junction temperature T
j
.
IH(Tj)
IH(25C)
Fig.11. Transient thermal impedance Z
th j-mb
, versus
pulse width t
p
.
dV/dt (V/us)
off-state dV/dt limit
BT138...G SERIES
BT138 SERIES
3
2.5
2
1.5
1
0.5
TRIAC
1000
100
BT138...F SERIES
dIcom/dt =
15 A/ms
10
12
9.1
7
5.4
4.2
0
-50
0
50
Tj / C
100
150
1
0
50
Tj / C
100
150
Fig.9. Normalised holding current I
H
(T
j
)/ I
H
(25˚C),
versus junction temperature T
j
.
Fig.12. Typical commutation dV/dt versus junction
temperature, parameter commutation dI
T
/dt. The triac
should commutate when the dV/dt is below the value
on the appropriate curve for pre-commutation dI
T
/dt.
October 1997
4
Rev 1.200
Philips Semiconductors
Product specification
Triacs
BT138B series
MECHANICAL DATA
Dimensions in mm
Net Mass: 1.4 g
10.3 max
4.5 max
1.4 max
11 max
15.4
2.5
0.85 max
(x2)
2.54 (x2)
0.5
Fig.13. SOT404 : centre pin connected to mounting base.
Notes
1. Epoxy meets UL94 V0 at 1/8".
MOUNTING INSTRUCTIONS
Dimensions in mm
11.5
9.0
17.5
2.0
3.8
5.08
Fig.14. SOT404 : minimum pad sizes for surface mounting.
Notes
1. Plastic meets UL94 V0 at 1/8".
October 1997
5
Rev 1.200
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