Dimensions
Inches
Millimeters
A
0.55 Min.
14.0 Min.
B
0.12 Max.
3.0 Max.
C
0.16
4.0
D
0.14
3.55
E
0.098 Max.
2.5 Max.
F 0.016 0.4
G
0.05 0.012
1.27
H
0.018
0.45
Description:
The BS08D bilateral switch is a
silicon planar monolithic integrated
circuit with the electrical character-
istics of a bilateral thyristor. The
device is designed to switch at 7
to 9 volts with a 0.01%/C temper-
ature coefficient and have excel-
lently matched characteristics in
both directions.
Features:
Low Switching Voltage of
7 to 9 Volts
Excellent Switching Voltage
Temperature Characteristics
(0.01%/C)
High Reliability Devices
Gate Electrode Facilitating
Switching Operation Control
and Synchronization.
Applications:
Trigger Circuits for Thyristor or
Triac, Oscillators, Timers
Ordering Information:
Example: Select the complete five
digit part number you desire from
the table - i.e. BS08D is a 175mA
Silicon Bilateral Switch.
Type
BS08D
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
Silicon
Bilateral Switch
BS08D
Outline Drawing
TT-1
G
G
D
D
C
B
J
H
A
T2 TERMINAL
GATE
T1 TERMINAL
E
F
OUTLINE DRAWING
CONNECTION DIAGRAM
Absolute Maximum Ratings,
T
a
= 25 C unless otherwise specified
Ratings
Symbol
BS08D
Units
DC Forward Anode Current
I
T
175
mA
Repetitive Peak Forward Current
1.0
Amperes
(1% Duty Cycle, 10 s Pulsewidth), T
a
= 100C
Non-repetitive Peak Forward Current (10 s Pulsewidth)
2.0
Amperes
Power Dissipation
P
T
450
mW
DC Gate Current
I
G
5
mA
Storage Temperature
T
stg
-55 to 125
C
Operating Temperature
T
j
-55 to 125
C
Electrical and Thermal Characteristics,
T
j
= 25 C unless otherwise specified
BS08D
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Switching Voltage
V
S
T
a
= 25C
7
8
9
Volts
Switching Current
I
S
T
a
= 25C
200
A
Absolute Switching Voltage Difference
V
S1
-V
S2
T
a
= 25C
0.5
Volts
Absolute Switching Current Difference
I
S1
-I
S2
T
a
= 25C
100
A
Holding Current
I
H
T
a
= 25C
1.5
mA
Off-state Current
I
D
V
D
= 5V, T
a
= 25C
1.0
A
V
D
= 5V, T
a
= 85C
10
A
Temperature Coefficient of Switching Voltage
T
a
= -55 to 85C
0.01
%/C
Peak On-state Voltage
V
T
I
T
= 175mA, T
a
= 25C
1.4
Volts
Gate Trigger Current
I
GT
V
D
= 5V, T
a
= 25C
10
200
A
Gate Non-trigger Voltage
V
GD
V
D
= 5V, T
a
= 85C
0.2
Volts
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
BS08D
Silicon Bilateral Switch
TT-2
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
BS08D
Silicon Bilateral Switch
OFF-STATE CURRENT
VS. JUNCTION TEMPERATURE
(TYPICAL)
JUNCTION TEMPERATURE, T
j
, (
C)
-40
10
-2
10
-1
10
0
10
1
0
40
80
120
-20
-60
20
60
100
140
OFF-STATE CURRENT, I
D
, (
A)
V
D
= 5V
SWITCHING VOLTAGE
VS.JUNCTION TEMPERATURE
(TYPICAL)
JUNCTION TEMPERATURE, T
j
, (
C)
-60
7.5
7.7
7.9
8.1
8.3
SWITCHING VOLTAGE, V
S
, (VOLTS)
-20
20
60
100
140
-40
0
40
80
120
SWITCHING CURRENT
VS. JUNCTION TEMPERATURE
(TYPICAL)
JUNCTION TEMPERATURE, T
j
, (
C)
SWITCHING CURRENT, I
S
, (
A)
-60
-20
20
60
100
140
-40
0
40
80
120
0
80
160
240
320
TYPICAL VALUE
TYPICAL DISTRIBUTION
ON-STATE VOLTAGE
VS. JUNCTION TEMPERATURE
(TYPICAL)
JUNCTION TEMPERATURE, T
j
, (
C)
-60
0.80
0.90
1.00
1.10
1.20
1.30
ON-STATE VOLTAGE, V
T
, (VOLTS)
I
T
= 175mA
-20
20
60
100
140
-40
0
40
80
120
HOLDING CURRENT
VS. JUNCTION TEMPERATURE
(TYPICAL)
JUNCTION TEMPERATURE, T
j
, (
C)
HOLDING CURRENT, I
H
, (
A)
-60 -40
0
40
80
-20
20
60
100
0
200
400
600
800
TYPICAL VALUE
TYPICAL DISTRIBUTION
GATE TRIGGER CURRENT
VS. JUNCTION TEMPERATURE
(TYPICAL)
JUNCTION TEMPERATURE, T
j
, (
C)
GATE TRIGGER CURRENT, I
GT
, (
A)
0
20
40
60
80
100
0
40
80
120
160
TYPICAL VALUE
TYPICAL DISTRIBUTION
V
D
= 5V
GATE TRIGGER VOLTAGE
VS. JUNCTION TEMPERATURE
(TYPICAL)
JUNCTION TEMPERATURE, T
j
, (
C)
GATE TRIGGER VOLTAGE, V
GT
, (VOLTS)
0
20
40
60
80
100
0
0.2
0.4
0.6
0.8
TYPICAL DISTRIBUTION
V
D
= 5V
TT-3
Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
BS08D
Silicon Bilateral Switch
CIRCUIT SYMBOL
5V
10k
47
A
A
V
V
GATE CHARACTERISTICS
MEASUREMENT CIRCUIT
APPLICATION EXAMPLES
THYRISTOR TRIGGER CIRCUIT
EQUIVALENT CIRCUIT
T
2
T
1
G
LOAD
SBS
BS08D
BCR16
HM-8
Triac
VR
200K
AC INPUT
100VAC
R
1
100 , 0.25W
R
2
100
0.5W
R
3
15k
(1W)
D
1
D
2
C
2
0.1 F
400WV
C
1
0.47 F
25WV
This circuit is useable in such applications as lighting
control circuits, electric heater control, and other load
control applications.
TRIAC TRIGGER CIRCUIT
V
T2
V
T1
V
S2
V
S1
I
S2
I
D2
I
D1
I
H2
I
S1
I
H1
-I
+I
-V
+V
STATIC CHARACTERISTICS
LOAD
1k
SBS
BS08D
0.1 F
C
1M
VR
D
R
220k
CR2AM-8
CR
AC INPUT
100VAC
R
2
This circuit is widely used in DC motor
contol and other control applications.
T
1
T
2
G
TT-4
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