Transistors - Bipolar (BJT) - Single

Category Introduction

Discrete Bipolar Junction Transistors (BJTs) are commonly used to construct analog signal amplification functions in audio, radio, and other applications. One of the first semiconductor devices to be mass produced, their characteristics are less favorable than those of other device types for applications involving high frequency switching and operation with high currents or voltages, but they remain a technology of choice for applications requiring analog signal reproduction with minimal added noise and distortion.

Product List

3247 Items

Mfr Part #	Quantity Available	UnitPrice	Series	Packaging	Product Status	Transistor Type	Current - Collector (Ic) (Max)	Voltage - Collector Emitter Breakdown (Max)	Vce Saturation (Max) @ Ib, Ic	Current - Collector Cutoff (Max)	DC Current Gain (hFE) (Min) @ Ic, Vce	Power - Max	Frequency - Transition	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
BC846B,235 TRANS NPN 65V 0.1A TO236AB Nexperia USA Inc.	1,027	$0.14	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	100 mA	65 V	400mV @ 5mA, 100mA	15nA (ICBO)	200 @ 2mA, 5V	250 mW	100MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
BC846B,215 TRANS NPN 65V 0.1A TO236AB Nexperia USA Inc.	4,642	$0.14	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	100 mA	65 V	400mV @ 5mA, 100mA	15nA (ICBO)	200 @ 2mA, 5V	250 mW	100MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
MMBT3904,215 TRANS NPN 40V 0.2A TO236AB Nexperia USA Inc.	411	$0.13	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	200 mA	40 V	300mV @ 5mA, 50mA	50nA (ICBO)	100 @ 10mA, 1V	250 mW	300MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
PMBT3904,235 TRANS NPN 40V 0.2A TO236AB Nexperia USA Inc.	1,260	$0.13	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	200 mA	40 V	300mV @ 5mA, 50mA	50nA (ICBO)	100 @ 10mA, 1V	250 mW	300MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
PMBT3904,215 TRANS NPN 40V 0.2A TO236AB Nexperia USA Inc.	4,839	$0.13	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	200 mA	40 V	300mV @ 5mA, 50mA	50nA (ICBO)	100 @ 10mA, 1V	250 mW	300MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
BC847B,235 TRANS NPN 45V 0.1A TO236AB Nexperia USA Inc.	3,398	$0.14	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	100 mA	45 V	400mV @ 5mA, 100mA	15nA (ICBO)	200 @ 2mA, 5V	250 mW	100MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
BC847B,215 TRANS NPN 45V 0.1A TO236AB Nexperia USA Inc.	2,680	$0.14	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	100 mA	45 V	400mV @ 5mA, 100mA	15nA (ICBO)	200 @ 2mA, 5V	250 mW	100MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
MMBT3904-TP TRANS NPN 40V 0.2A SOT23 Micro Commercial Co	5,638	$0.15		Tape & Reel (TR)	Active	NPN	200 mA	40 V	300mV @ 5mA, 50mA	50nA (ICBO)	100 @ 10mA, 1V	350 mW	300MHz	-55°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23
MMBT2222A-TP TRANS NPN 40V 0.6A SOT23 Micro Commercial Co	3,282	$0.15		Tape & Reel (TR)	Active	NPN	600 mA	40 V	1V @ 50mA, 500mA	-	100 @ 150mA, 10V	350 mW	300MHz	-55°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23
BC817-40,235 TRANS NPN 45V 0.5A TO236AB Nexperia USA Inc.	794	$0.18	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	500 mA	45 V	700mV @ 50mA, 500mA	100nA (ICBO)	250 @ 100mA, 1V	250 mW	100MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
BC817-40,215 TRANS NPN 45V 0.5A TO236AB Nexperia USA Inc.	1,570	$0.18	BC817	Tape & Reel (TR)	Active	NPN	500 mA	45 V	700mV @ 50mA, 500mA	100nA (ICBO)	250 @ 100mA, 1V	250 mW	100MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
MMBT3904-HF TRANS NPN 40V 0.2A SOT23-3 Comchip Technology	450	$0.17		Tape & Reel (TR)	Active	NPN	200 mA	40 V	300mV @ 5mA, 50mA	100nA (ICBO)	100 @ 10mA, 1V	200 mW	300MHz	-55°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3
BC807-40,215 TRANS PNP 45V 0.5A TO236AB Nexperia USA Inc.	5,520	$0.18	Automotive, AEC-Q101	Tape & Reel (TR)	Active	PNP	500 mA	45 V	700mV @ 50mA, 500mA	100nA (ICBO)	250 @ 100mA, 1V	250 mW	80MHz	150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB
BC847BW-7-F TRANS NPN 45V 0.1A SOT323 Diodes Incorporated	694	$0.21		Tape & Reel (TR)	Active	NPN	100 mA	45 V	600mV @ 5mA, 100mA	20nA (ICBO)	200 @ 2mA, 5V	200 mW	300MHz	-65°C ~ 150°C (TJ)	Surface Mount	SC-70, SOT-323	SOT-323
BC817-40-7-F TRANS NPN 45V 0.5A SOT23-3 Diodes Incorporated	1,476	$0.22	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	500 mA	45 V	700mV @ 50mA, 500mA	100nA	250 @ 100mA, 1V	310 mW	100MHz	-65°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3
BC847BT-7-F TRANS NPN 45V 0.1A SOT523 Diodes Incorporated	3,307	$0.22		Tape & Reel (TR)	Active	NPN	100 mA	45 V	600mV @ 5mA, 100mA	15nA (ICBO)	200 @ 2mA, 5V	150 mW	100MHz	-55°C ~ 150°C (TJ)	Surface Mount	SOT-523	SOT-523
BC847CT-7-F TRANS NPN 45V 0.1A SOT523 Diodes Incorporated	2,275	$0.22		Tape & Reel (TR)	Active	NPN	100 mA	45 V	600mV @ 5mA, 100mA	15nA (ICBO)	420 @ 2mA, 5V	150 mW	100MHz	-55°C ~ 150°C (TJ)	Surface Mount	SOT-523	SOT-523
MMBT2222ALP4-7B TRANS NPN 40V 0.6A 3DFN Diodes Incorporated	282	$0.32	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	600 mA	40 V	1V @ 50mA, 500mA	10nA (ICBO)	100 @ 150mA, 10V	460 mW	300MHz	-55°C ~ 150°C (TJ)	Surface Mount	3-XFDFN	X2-DFN1006-3
MMBT2484LT1G TRANS NPN 60V 0.1A SOT23-3 onsemi	207	$0.26		Tape & Reel (TR)	Active	NPN	100 mA	60 V	350mV @ 100µA, 1mA	10nA (ICBO)	250 @ 1mA, 5V	225 mW	-	-55°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3 (TO-236)
SMMBT3904LT1G TRANS NPN 40V 0.2A SOT23-3 onsemi	3,440	$0.29	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	200 mA	40 V	300mV @ 5mA, 50mA	-	100 @ 10mA, 1V	300 mW	300MHz	-55°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3 (TO-236)

About Single Bipolar Transistors

What are Single Bipolar Transistors?

Single Bipolar Transistors

Single Bipolar Transistors (BJTs) are semiconductor devices that amplify or switch electrical signals. They consist of three layers of semiconductor material, forming two p-n junctions. The three layers are known as the emitter, base, and collector. BJTs operate by using a small input current at the base to control a larger current flow between the collector and emitter. This principle of current amplification makes them essential components in various electronic circuits. BJTs are characterized by their ability to provide high gain and fast switching speeds, making them suitable for a wide range of applications.

Types of Single Bipolar Transistors

NPN Transistors

NPN transistors are one of the most common types of BJTs. They consist of a layer of p-type semiconductor sandwiched between two n-type layers. In NPN transistors, a positive voltage applied to the base allows current to flow from the collector to the emitter. They are widely used in amplification and switching applications due to their high electron mobility and efficiency.

PNP Transistors

PNP transistors have a structure opposite to that of NPN transistors, with an n-type layer between two p-type layers. In these transistors, a negative voltage applied to the base allows current to flow from the emitter to the collector. PNP transistors are often used in complementary circuits with NPN transistors, providing versatility in circuit design.

Darlington Transistors

Darlington transistors are a pair of BJTs connected in such a way that the current amplified by the first is further amplified by the second. This configuration provides very high current gain, making them ideal for applications requiring high power amplification. They are commonly used in power amplifiers and motor control circuits.

How to choose Single Bipolar Transistors?

When selecting a single bipolar transistor, several key parameters should be considered:

Current Gain (hFE): The ratio of output current to input current, indicating the transistor's amplification capability.
Collector-Emitter Voltage (V_CE): The maximum voltage the transistor can withstand between the collector and emitter.
Collector Current (I_C): The maximum current the transistor can handle.
Power Dissipation: The amount of power the transistor can dissipate without overheating.
Frequency Response: The range of frequencies over which the transistor can operate effectively.

To evaluate product quality and reliability, consider the manufacturer's reputation, product datasheets, and reviews from other users. Environmental factors such as temperature, humidity, and exposure to harsh conditions should also be considered, as they can affect the transistor's performance and longevity. Proper installation, including adequate heat sinking and protection from electrical overstress, is crucial for optimal performance.

Applications of Single Bipolar Transistors

Consumer Electronics

In consumer electronics, BJTs are used in audio amplifiers, radio transmitters, and television receivers. They amplify weak signals to drive speakers or other output devices, providing clear and powerful sound and video signals.

Automotive Industry

In the automotive sector, BJTs are employed in ignition systems, power management, and motor control. They help in switching and controlling the power supply to various components, ensuring efficient operation of the vehicle's electrical systems.

Telecommunications

Telecommunications equipment relies on BJTs for signal amplification and switching in devices such as modems, routers, and mobile phones. They ensure strong and stable signal transmission over long distances.

Industrial Automation

In industrial automation, BJTs are used in motor drives, control systems, and power converters. Their ability to handle high currents and voltages makes them suitable for controlling heavy machinery and equipment.

Medical Devices

Medical devices, including diagnostic equipment and patient monitoring systems, utilize BJTs for signal processing and amplification. They ensure accurate and reliable performance, critical for patient safety and effective diagnosis.