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
23
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
(0.15 ± 0.005)
0.64 ± 0.08
(0.025 ± 0.003)
LCC3
FEATURES
• High Voltage
• Ceramic Surface Mount
• Screening Options Available
ABSOLUTE MAXIMUM RATINGS
VCBO Collector - Base Voltage (IE= 0 )
VCEO Collector - Emitter Voltage (IB= 0)
VEBO Emitter Base Voltage (IC= 0)
ICCollector Current
ICM Collector Peak Current
Ptot Total Power Dissipation at Tcase
£
50°C
Tstg Storage Temperature
Tj Junction Temperature
PAD 1 = COLLECTOR
PAD 2 = N/C
PAD 3 = EMITTER
PAD 4 = BASE
160V
160V
5V
100mA
200mA
5W
-55 to 200°C
200°C
Rth j-case Thermal resistance junction - case max 30°C/W
Rth j-amb Thermal resistance junction - ambient max 175°C/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 = 25°C Unless otherwise specified)
Parameter Test Conditions Min. Typ. Max. Unit
V(BR)CEO*
V(BR)CBO
V(BR)EBO
ICBO
VCE(sat)*
hFE*
ft
Cre
Collector–Emitter 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
IC= 10mA IB= 0
IC= 100
m
AI
E= 0
IC= 0 IE= 100
m
A
VCB =100V IE= 0
IC= 30mA IB= 6mA
IC= 30mA IB= 10V
IC = 15mA VCE = 10V
IC= 0 VCE = 30V
f = 1MHz
* Pulsed test tp= 300
m
s ,
d
= 1%
