BC546/547/548/549/550
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BC546/547/548/549/550
BC546/547/548/549/550
Switching and Applications
High Voltage: BC546, VCEO 65V Low Noise: BC549, BC550 Complement to BC556 ... BC560
1
TO-92
1. Collector 2. Base 3. Emitter
NPN Epitaxial Silicon Transistor
Absolute Maximum Ratings Ta 25 C unless otherwise noted
Symbol VCBO Collector-Base Voltage Parameter : BC546 : BC547/550 : BC548/549 Value 80 50 30 65 45 30 6 5 100 500 150 -65 150 Units V V V V V V V V mA mW C C
VCEO
Collector-Emitter Voltage : BC546 : BC547/550 : BC548/549 Emitter-Base Voltage Collector Current (DC) Collector Power Dissipation Junction Temperature Storage Temperature : BC546/547 : BC548/549/550
VEBO IC PC TJ TSTG
Electrical Characteristics Ta 25 C unless otherwise noted
Symbol ICBO hFE VCE (sat) VBE (sat) VBE (on) fT Cob Cib NF Parameter Collector Cut-off Current DC Current Gain Collector-Emitter Saturation Voltage Base-Emitter Saturation Voltage Base-Emitter On Voltage Current Gain Bandwidth Product Output Capacitance Input Capacitance Noise Figure : BC546/547/548 : BC549/550 : BC549 : BC550 Test Condition VCB 30V, IE 0 VCE 5V, IC 2mA IC 10mA, IB 0.5mA IC 100mA, IB 5mA IC 10mA, IB 0.5mA IC 100mA, IB 5mA VCE 5V, IC 2mA VCE 5V, IC 10mA VCE 5V, IC 10mA, f 100MHz VCB 10V, IE 0, f 1MHz VEB 0.5V, IC 0, f 1MHz VCE 5V, IC 200 A f 1KHz, RG 2K VCE 5V, IC 200 A RG 2K, f 30 15000MHz 580 Min. 110 90 200 700 900 660 300 3.5 9 2 1.2 1.4 1.4 10 4 4 3 6 700 720 Typ. Max. 15 800 250 600 mV mV mV mV mV mV MHz pF pF dB dB dB dB Units nA
hFE Classification
Classification hFE
2002 Fairchild Semiconductor Corporation
A 110 220
B 200 450
C 420 800
Rev. A2, August 2002
BC547 Datasheet Fairchild Download PDF
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Comments
A friends at use the battery often meet a problem electric its energy is finished in important always may many good if there is the circuit warns before or there is the way checks at the beginning. By this circuit use the transistor just one and don’t have to have power supply source. By this circuit designs to come to use battery 3V - 15V. By fining decorates with VR1. When level voltage agree more location dot keeps LED1 as a result bright immediately. This circuit uses electronic part the a little , then easy in building , request friends , enjoy please yes.
http://www.elecfree.com/electronic/easy-test-power-battery-by-bc547/
Pushbutton activated
Very simple circuitry
Parts:
R1______________4K7 1/4W Resistor
R2,R3___________1K 1/4W Resistors
C1____________100µF 25V Electrolytic Capacitor (See Notes)
D1___________1N4002 100V 1A Diode
Q1____________BC547 45V 100mA NPN Transistor
Q2____________BC327 45V 800mA PNP Transistor
P1_____________SPST Pushbutton
RL1___________Relay with SPDT 10A min. switch
Coil Voltage 12V. Coil resistance 150-600 Ohms
http://www.elecfree.com/electronic/headlights-timer-by-bc547bc327/
This is it. It's a STEREO LED LEVEL METER. It's the cheapest and best bar graph display available and best of all, it uses readily available components.
You only need a handful of LEDs, 22 transistors, some resistors, diodes and a set of electros - it doesn't require any chips.
http://www.talkingelectronics.com/projects/StereoVUmeter/StereoVU.html
This voltage controlled switch circuit operates when a voltage level which is previously adjusted is applied to the input. Circuit is designed for 24V supply but can be used in a range of 18V-36V. Voltage level which triggers the circuit can be adjusted by P1 potentiometer. A stabilized voltage is applied to this potentiometer through zener diode and Tr5. When the input voltage level exceeds this value TR1 starts conducting and afterwards Tr2, Tr3, Tr4 transistors conduct and relay switches on.
Switch S1 that is connected to relay, carries the signal from Tr3 to Tr1 through R1 and keeps Tr1 conducting.
When the input is short circuited, D1 diode keeps the circuit operating and you can omit it if you want
http://www.circuit-projects.com/control-circuits/voltage-controlled-swit...