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Bipolar Transistors (BJT)

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SMAJ30CA
UDF
300mV NPN 200mW 30V 8.3A 30V 48.4V 8.3A
Quantity: 3188
In Stock
24+
10+ $0.0193
100+ $0.016
300+ $0.0137
1000+ $0.0119
6000+ $0.0106
20000+ $0.0102
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x $0.0193
Ext. Price: $0.19
MOQ: 10
Mult: 1
SPQ: 1800
MMBT3904
UDF
300mV 1NPN 200mW 6V 100nA 60V 30V 200mA SOT-23
Quantity: 14467
In Stock
24+
10+ $0.0042
100+ $0.0035
300+ $0.0029
1000+ $0.0026
6000+ $0.0023
20000+ $0.0021
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x $0.0042
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000
SS110
UDF
Quantity: 5979
In Stock
24+
10+ $0.0082
100+ $0.0069
300+ $0.0058
1000+ $0.005
6000+ $0.0046
20000+ $0.0043
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Ext. Price: $0.08
MOQ: 10
Mult: 1
SPQ: 2000
MMBT5401
UDF
-0.2V @IC=−10mA,IB=−1.0mA PNP -5V 600mA 45V 600mA SOT-23
Quantity: 5857
In Stock
24+
10+ $0.0065
100+ $0.0054
300+ $0.0046
1000+ $0.004
6000+ $0.0035
20000+ $0.0034
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x $0.0065
Ext. Price: $0.06
MOQ: 10
Mult: 1
SPQ: 3000
MMBTA42
UDF
0.5V @IC=20mA,IB=2.0mA 1NPN 60V 500mA SOT-23
Quantity: 2837
In Stock
23+
10+ $0.0101
100+ $0.0084
300+ $0.0072
1000+ $0.0063
6000+ $0.0056
20000+ $0.0053
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x $0.0101
Ext. Price: $0.10
MOQ: 10
Mult: 1
SPQ: 3000
MMBT5551
UDF
200mV 1NPN 300mW 6V 50nA 180V 100V 600mA SOT-23
Quantity: 6794
In Stock
23+
10+ $0.005
100+ $0.0042
300+ $0.0036
1000+ $0.0031
6000+ $0.0028
20000+ $0.0027
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x $0.005
Ext. Price: $0.05
MOQ: 10
Mult: 1
SPQ: 3000
MMBT2907A
UDF
1.6V@ 500mA,50mA 1PNP 300mW 5V 20nA 60V 45V 600mA SOT-23
Quantity: 4419
In Stock
2420+
10+ $0.005
50+ $0.004
100+ $0.0034
500+ $0.0028
1000+ $0.0027
3000+ $0.0027
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x $0.005
Ext. Price: $0.05
MOQ: 10
Mult: 10
SPQ: 3000
S9015
UDF
-0.3V @IC=-100mA,IB= -10mA 1PNP 60V 100mA SOT-23
Quantity: 9346
In Stock
23+
10+ $0.0042
100+ $0.0035
300+ $0.0029
1000+ $0.0026
6000+ $0.0023
20000+ $0.0021
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x $0.0042
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000
SS8550
UDF
500mV 1PNP 300mW 5V 100nA 40V 30V 1.5A SOT-23
Quantity: 3
In Stock
23+
3+ $0.0027
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x $0.0027
Ext. Price: $0.00
MOQ: 3
Mult: 1
SPQ: 3000
MMBT4403
UDF
750mV PNP 300mW 5V 100nA 40V 50V 600mA SOT-23
Quantity: 2978
In Stock
23+
10+ $0.0069
100+ $0.0058
300+ $0.0049
1000+ $0.0042
6000+ $0.0038
20000+ $0.0036
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x $0.0069
Ext. Price: $0.06
MOQ: 10
Mult: 1
SPQ: 3000
S9014
UDF
300mV NPN 200mW 5V 100nA 50V 25V 100mA SOT-23
Quantity: 5744
In Stock
24+
10+ $0.0041
100+ $0.0034
300+ $0.0029
1000+ $0.0025
6000+ $0.0022
20000+ $0.0021
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x $0.0041
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000
BAV70
UDF
400V SOT-23
Quantity: 11435
In Stock
24+
10+ $0.0059
100+ $0.005
300+ $0.0042
1000+ $0.0036
6000+ $0.0033
20000+ $0.0031
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x $0.0059
Ext. Price: $0.05
MOQ: 10
Mult: 1
SPQ: 3000
BC856B
UDF
-75mV @IC = -10 mA; IB = -0.5 mA 1PNP 45V 100mA SOT-23
Quantity: 1810
In Stock
23+
10+ $0.005
100+ $0.0042
300+ $0.0035
1000+ $0.003
6000+ $0.0027
20000+ $0.0026
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x $0.005
Ext. Price: $0.05
MOQ: 10
Mult: 1
SPQ: 3000
SMBJ5.0CA
UDF
Quantity: 26466
In Stock
24+
10+ $0.022
100+ $0.0183
300+ $0.0157
1000+ $0.0135
6000+ $0.0122
20000+ $0.0116
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x $0.022
Ext. Price: $0.22
MOQ: 10
Mult: 1
SPQ: 750
S8550
UDF
600mV 1PNP 300mW 5V 100nA 40V 50V 500mA SOT-23
Quantity: 1850
In Stock
23+
10+ $0.0044
100+ $0.0037
300+ $0.0032
1000+ $0.0027
6000+ $0.0025
20000+ $0.0023
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x $0.0044
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000
2SC1815
UDF
0.25V @IC=100mA,IB= 10mA 1NPN 50V 150mA SOT-23
Quantity: 2758
In Stock
24+
10+ $0.0042
100+ $0.0035
300+ $0.0029
1000+ $0.0026
6000+ $0.0023
20000+ $0.0021
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x $0.0042
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000
MMBT2222A
UDF
1.6V @IC=500 mA,IB =50mA NPN 6V 600mA 100V 600mA SOT-23
Quantity: 1991
In Stock
23+
10+ $0.0062
100+ $0.0052
300+ $0.0044
1000+ $0.0038
6000+ $0.0035
20000+ $0.0033
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x $0.0062
Ext. Price: $0.06
MOQ: 10
Mult: 1
SPQ: 3000
MMBT4401
UDF
0.75V @IC=500mA,IB=50mA NPN 350000KW 6V 600mA 40V 600mA SOT-23
Quantity: 693
In Stock
23+
10+ $0.0069
100+ $0.0058
300+ $0.005
1000+ $0.0042
6000+ $0.0038
20000+ $0.0036
- +
x $0.0069
Ext. Price: $0.06
MOQ: 10
Mult: 1
SPQ: 3000
BC857B
UDF
-75mV @IC = -10 mA; IB = -0.5 mA PNP 200000KW 6V 100nA 50V 100mA SOT-23
Quantity: 1860
In Stock
23+
10+ $0.005
100+ $0.0042
300+ $0.0035
1000+ $0.003
6000+ $0.0027
20000+ $0.0026
- +
x $0.005
Ext. Price: $0.05
MOQ: 10
Mult: 1
SPQ: 3000
MMBTA92
UDF
-0.5V @IC=−20mA,IB = −2.0 mA 1PNP 60V 500mA SOT-23
Quantity: 5655
In Stock
24+
10+ $0.0102
100+ $0.0085
300+ $0.0073
1000+ $0.0063
6000+ $0.0057
20000+ $0.0054
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x $0.0102
Ext. Price: $0.10
MOQ: 10
Mult: 1
SPQ: 3000
BC846B
UDF
100mA 1NPN 200mW 6V 100nA 80V 65V 100nA SOT-23
Quantity: 3100
In Stock
24+
10+ $0.0044
100+ $0.0036
300+ $0.0031
1000+ $0.0027
6000+ $0.0024
20000+ $0.0023
- +
x $0.0044
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000
S9012
UDF
600mV 1PNP 300mW 5V 100nA 40V 45V 500mA SOT-23
Quantity: 1377
In Stock
23+
10+ $0.0042
100+ $0.0035
300+ $0.0029
1000+ $0.0026
6000+ $0.0023
20000+ $0.0021
- +
x $0.0042
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000
BC817-25
UDF
700mV @IC = 500 mA; IB = 50 mA; Tamb = 25 °C 1NPN 45V 500mA SOT-23
Quantity: 1551
In Stock
23+
10+ $0.0078
100+ $0.0065
300+ $0.0055
1000+ $0.0048
6000+ $0.0042
20000+ $0.0041
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x $0.0078
Ext. Price: $0.07
MOQ: 10
Mult: 1
SPQ: 3000
MMBT3906
UDF
300mV 1PNP 5V 50nA 40V 40V 200mA SOT-23
Quantity: 1267
In Stock
23+
10+ $0.0042
100+ $0.0035
300+ $0.0029
1000+ $0.0026
6000+ $0.0023
20000+ $0.0021
- +
x $0.0042
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000
S8050
UDF
600mV 1NPN 300mW 5V 100nA 40V 45V 500mA SOT-23
Quantity: 50199
In Stock
24+
10+ $0.0042
100+ $0.0035
300+ $0.0029
1000+ $0.0026
6000+ $0.0023
20000+ $0.0021
- +
x $0.0042
Ext. Price: $0.04
MOQ: 10
Mult: 1
SPQ: 3000

Bipolar Transistors (BJT)

BJT stands for Bipolar Junction Transistor, a crucial component in electronic circuits. Here's a concise introduction in English:

Definition:
A Bipolar Junction Transistor (BJT) is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of three layers of semiconductor material: an emitter, a base, and a collector. The emitter and collector are doped differently to create a PNP (positive-negative-positive) or NPN (negative-positive-negative) configuration.

Function:
BJTs function by allowing a small current to control a larger current flow. They operate in one of three modes: active, saturation, or cutoff. In the active mode, the base-emitter junction is forward-biased, and the base-collector junction is reverse-biased, allowing current to flow from emitter to collector. In saturation, both junctions are forward-biased, and the transistor acts as a closed switch. In cutoff, both junctions are reverse-biased, and no current flows.

Applications:
BJTs are used in a wide range of applications, including:
1. Amplifiers: They amplify weak signals in audio systems, radio receivers, and other electronic devices.
2. Switches: They can be used as digital switches in computers and other digital systems.
3. Voltage regulators: They help maintain a stable voltage in power supplies.
4. Motor controls: They are used in the control circuits of electric motors.

Selection Criteria:
When selecting a BJT, consider the following:
1. Current Gain (hFE): The higher the gain, the more current can be controlled with a given input current.
2. Power Rating: Ensure the BJT can handle the power levels required for the application.
3. Operating Voltage: Choose a BJT with a suitable voltage range for the circuit.
4. Frequency Response: For high-frequency applications, select a BJT with a high cutoff frequency.
5. Physical Size and Packaging: Consider the physical dimensions and the type of package that fits the design.
6. Temperature Range: Ensure the BJT can operate within the temperature range of the application.
7. Cost: Factor in the cost-effectiveness of the BJT for the intended use.

BJTs are fundamental to the operation of many electronic devices, and their selection is critical for the performance and reliability of the system.
Please refer to the product rule book for details.