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
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.
SILICON PLANAR NPN HIGH
VOLTAGE TRANSISTOR IN A
CERAMIC SURFACE MOUNT
PACKAGE
MECHANICAL DATA
Dimensions in mm (inches)
1
2
3
4
5.59 0.13
(0.22 0.005)
0.23
(0.009)
rad.
1.02 0.20
(0.04 0.008)
2.03 0.20
(0.08 0.008)
1.40 0.15
(0.055 0.006)
0.25 0.03
(0.01 0.001)
0.23
(0.009)
min.
1.
27 0.
05
(
0
.
05 0.
002
)
3.
81 0.
13
(
0
.
1
5 0.
00
5)
0.
64 0.
08
(
0
.
025 0.
003)
LCC3
FEATURES
High Voltage
Ceramic Surface Mount
Screening Options Available
ABSOLUTE MAXIMUM RATINGS
V
CBO
Collector - Base Voltage (I
E
= 0 )
V
CEO
Collector - Emitter Voltage (I
B
= 0)
V
EBO
Emitter Base Voltage (I
C
= 0)
I
C
Collector Current
I
CM
Collector Peak Current
P
tot
Total Power Dissipation at T
case
50C
T
stg
Storage Temperature
T
j
Junction Temperature
PAD 1 = COLLECTOR
PAD 2 = N/C
PAD 3 = EMITTER
PAD 4 = BASE
160V
160V
5V
100mA
200mA
5W
-55 to 200C
200C
R
th j-case
Thermal resistance junction - case
max
30C/W
R
th j-amb
Thermal resistance junction - ambient
max
175C/W
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
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.
Thermal Data
Electrical Characteristics
(Tamb = 25C Unless otherwise specified)
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
(BR)CEO*
V
(BR)CBO
V
(BR)EBO
I
CBO
V
CE(sat)*
h
FE*
f
t
C
re
CollectorEmitter Breakdown Voltage
Collector Base Breakdown Voltage
Emitter - Base Breakdown Voltage
Collector Cutoff Current
Collector Emitter Saturation Voltage
DC Current Gain
Transition Frequency
Reverse Capacitance
160
160
5
50
1
25
90
3
V
nA
V
--
MHz
pF
I
C
= 10mA
I
B
= 0
I
C
= 100
mA
I
E
= 0
I
C
= 0
I
E
= 100
mA
V
CB
=100V
I
E
= 0
I
C
= 30mA
I
B
= 6mA
I
C
= 30mA
I
B
= 10V
I
C
= 15mA
V
CE
= 10V
I
C
= 0
V
CE
= 30V
f = 1MHz
* Pulsed test t
p
= 300
ms , d = 1%
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