Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
www.pwrx.com Silicon Bilateral Switch
BS08D-T112
12/11 Rev. 1
Description:
The BS08D-T112 bilateral switch
is a silicon planar monolithic
integrated circuit with the
electrical characteristics of a
bilateral thyristor. The device is
designed to switch at 7 to 9 volts
with a 0.01%/°C temperature
coefficient and have excellently
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:
BS08D-T112 is tape and fancil
packaged (2500/box).
Outline Drawing and Circuit Diagram
Dimension Inches Millimeters
A 0.55 Min. 14.0 Min.
B 0.12 Max. 3.0 Max.
C 0.16 4.0
D 0.39 1.0
E 0.098 Max. 2.5 Max.
Dimension Inches Millimeters
F 0.016 0.4
G 0.10 2.5
H 0.018 0.45
J 0.004 0.1
K 0.29 Max. 7.5 Max.
G G
D
D
C
BK
J
H
A
E
T2 TERMINAL
GATE
T1 TERMINAL
CONNECTION DIAGRAM
F
13
2
1
3
2
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272 www.pwrx.com
2
BS08D-T112
Silicon Bilateral Switch
2/11 Rev. 1
Absolute Maximum Ratings, Tj = 25°C unless otherwise specied
Characteristics Symbol BS08D-T112 Units
DC Forward Anode Current IT 175 mA
Repetitive Peak Forward Current — 1.0 Amperes
(1% Duty Cycle, 10 µs Pulsewidth), T
a = 100°C
Non-repetitive Peak Forward Current (10 µs Pulsewidth) — 2.0 Amperes
Power Dissipation PT 450 mW
DC Gate Current IG 5 mA
Storage Temperature Tstg -55 to 125 °C
Operating Temperature Tj -55 to 125 °C
Electrical and Mechanical Characteristics, Tj = 25°C unless otherwise specied
Characteristics Symbol Test Conditions Min. Typ. Max. Units
Switching Voltage VS T
a = 25°C 7 8 9 Volts
Switching Current IS T
a = 25°C — — 200 µA
Absolute Switching Voltage Difference |VS1 -VS2| T
a = 25°C — — 0.5 Volts
Absolute Switching Current Difference |IS1 -IS2| T
a = 25°C — — 100 µA
Holding Current IH Ta = 25°C — — 1.5 mA
Off-state Current ID VD = 5V, T
a = 25°C — — 1.0 µA
VD = 5V, T
a = 85°C — — 10 µA
Temperature Coefficient of Switching Voltage — T
a = -55 to 85°C — ±0.01 — %/°C
Peak On-state Voltage VT IT = 175mA, T
a = 25°C — — 1.4 Volts
Gate Trigger Current IGT VD = 5V, T
a = 25°C 10 — 200 µA
Gate Non-trigger Voltage VGD VD = 5V, T
a = 85°C 0.2 — — Volts
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272 www.pwrx.com
3
BS08D-T112
Silicon Bilateral Switch
2/11 Rev. 1
GATE TRIGGER VOLTAGE
VS. JUNCTION TEMPERATURE
(TYPICAL)
HOLDING CURRENT
VS. JUNCTION TEMPERATURE
(TYPICAL)
ON-STATE VOLTAGE
VS. JUNCTION TEMPERATURE
(TYPICAL)
GATE TRIGGER CURRENT
VS. JUNCTION TEMPERATURE
(TYPICAL)
OFF-STATE CURRENT
VS. JUNCTION TEMPERATURE
(TYPICAL)
101
100
10-1
10-2
-60 -40 -20 0 20 40 60 80 100 120140
8.3
8.1
7. 5
7. 7
7. 9
-60 -40 -20 0 20 40 60 80 100 120140
320
240
160
80
0
-60 -40 -20 0 20 40 60 80 100
TYPICAL DISTRIBUTION
VD = 5V
VD = 5V
IT = 175mA VD = 5V
TYPICAL VALUE
TYPICAL DISTRIBUTION
TYPICAL VALUE
TYPICAL DISTRIBUTION
TYPICAL DISTRIBUTION
TYPICAL VALUE
120140
SWITCHING VOLTAGE
VS. JUNCTION TEMPERATURE
(TYPICAL)
SWITCHING CURRENT
VS. JUNCTION TEMPERATURE
(TYPICAL)
JUNCTION TEMPERATURE, Tj, (°C) JUNCTION TEMPERATURE, Tj, (°C) JUNCTION TEMPERATURE, Tj, (°C)
JUNCTION TEMPERATURE, Tj, (°C)
JUNCTION TEMPERATURE, Tj, (°C)
JUNCTION TEMPERATURE, Tj, (°C) JUNCTION TEMPERATURE, Tj, (°C)
OFF-STATE CURRENT, ID, (µA)
1.30
1.20
1. 10
1.00
0.80
0.90
-60 -40 -20 0 20 40 60 80 100 120140
0.8
0.6
0.4
0.2
0
0 20 40 60 80 100
800
600
400
200
0
-60 -40 -20 0 20 40 60 80 100
160
120
80
40
0
0 20 40 60 80 100
SWITCHING VOLTAGE, VS, (VOLTS)
SWITCHING CURRENT, IS, (µA)
ON-STATE VOLTAGE, VT, (VOLTS)GATE TRIGGER VOLTAGE, VGT, (VOLTS)
HOLDING CURRENT, IH, (µA)
GATE TRIGGER CURRENT, IGT, (µA)
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272 www.pwrx.com
4
BS08D-T112
Silicon Bilateral Switch
2/11 Rev. 1
APPLICATION EXAMPLES
THYRISTOR TRIGGER CIRCUIT
LOAD
D
220kΩ
1kΩ
10kΩ
47Ω
5V
A
A
V
V
CR2AM-8
SBS
BS08D
R
CR2
T2
+I
VT1
+V-V
VS1
ID1
ID2
IS2
IH2
-I
VT2
VS2 IS1
IH1
T2
T1
T1
G
G
CR
0.1 µF
VR
1MΩ
AC INPUT
100VAC
This circuit is widely used in DC motor
control and other control applications.
LOAD
D2
D1
VR
220KΩ
BCR16
HM-8
Triac
SBS
BS08D
C2
0.1 µF
400WV
R2
100Ω
0.5W
R1
100Ω
0.25W
R3
15Ω
1W C1
0.47 µF
25WV
AC INPUT
100VAC
This circuit is usable in such applications as lighting
control circuits, electric heater control, and other load
control applications.
EQUIVALENT CIRCUIT
CIRCUIT SYMBOLTRIAC TRIGGER CIRCUIT GATE CHARACTERISTICS
MEASUREMENT CURCUIT
STATIC CHARACTERISTICS