BF257CSM4
MECHANICAL DATA
Dimensions in mm (inches)
SILICON PLANAR NPN HIGH
VOLTAGE TRANSISTOR IN A
CERAMIC SURFACE MOUNT
PACKAGE
1.40 ± 0.15
(0.055 ± 0.006)
0.25 ± 0.03
(0.01 ± 0.001)
5.59 ± 0.13
(0.22 ± 0.005)
0.64 ± 0.08
(0.025 ± 0.003)
0.23 rad.
(0.009)
3
2
1.27 ± 0.05
(0.05 ± 0.002)
3.81 ± 0.13
(0.15 ± 0.005)
4
1
0.23 min.
(0.009)
FEATURES
• High Voltage
• Ceramic Surface Mount
1.02 ± 0.20
(0.04 ± 0.008)
2.03 ± 0.20
(0.08 ± 0.008)
LCC3
PAD 1 = COLLECTOR
PAD 2 = N/C
PAD 3 = EMITTER
PAD 4 = BASE
• Screening Options Available
ABSOLUTE MAXIMUM RATINGS
V
CBO
V
CEO
V
EBO
I
C
I
CM
P
tot
T
stg
T
j
Collector - Base Voltage (I
E
= 0 )
Collector - Emitter Voltage (I
B
= 0)
Emitter Base Voltage (I
C
= 0)
Collector Current
Collector Peak Current
Total Power Dissipation at T
case
£
50°C
Storage Temperature
Junction Temperature
160V
160V
5V
100mA
200mA
5W
-55 to 200°C
200°C
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is
believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in
its use. Semelab encourages customers to verify that datasheets are current before placing orders.
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
Document Number 2666
Issue 1
BF257CSM4
Thermal Data
R
th j-case
R
th j-amb
Thermal resistance junction - case
Thermal resistance junction - ambient
Unless otherwise specified)
max
max
30°C/W
175°C/W
Electrical Characteristics
(Tamb = 25°C
Parameter
V
(BR)CEO*
V
(BR)CBO
V
(BR)EBO
I
CBO
V
CE(sat)*
h
FE*
f
t
C
re
Collector–Emitter Breakdown Voltage
Collector – Base Breakdown Voltage
Emitter - Base Breakdown Voltage
Collector Cutoff Current
DC Current Gain
Transition Frequency
Reverse Capacitance
= 1%
Test Conditions
I
C
= 10mA
I
C
= 100
m
A
I
C
= 0
V
CB
=100V
I
C
= 30mA
I
C
= 15mA
I
C
= 0
f = 1MHz
I
B
= 0
I
E
= 0
I
E
= 100
m
A
I
E
= 0
I
B
= 6mA
I
B
= 10V
V
CE
= 10V
V
CE
= 30V
Min.
160
160
5
Typ.
Max.
Unit
V
50
1
25
90
3
nA
V
—
MHz
pF
Collector – Emitter Saturation Voltage I
C
= 30mA
* Pulsed test t
p
= 300
m
s ,
d
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is
believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in
its use. Semelab encourages customers to verify that datasheets are current before placing orders.
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
Document Number 2666
Issue 1
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