Transistors - Bipolar (BJT) - RF

Category Introduction

Bipolar RF Transistors are semiconductor devices with three terminals that are used to switch or amplify signals in equipment involving radio frequencies. Bipolar junction transistors are designed as either NPN or PNP, with characteristics of transistor type, collector-emitter breakdown voltage, transition frequency, noise figure, gain, power, DC current gain, and collector current.

Product List

166 Items

Mfr Part #	Quantity Available	UnitPrice	Series	Packaging	Product Status	Transistor Type	Voltage - Collector Emitter Breakdown (Max)	Frequency - Transition	Noise Figure (dB Typ @ f)	Gain	Power - Max	DC Current Gain (hFE) (Min) @ Ic, Vce	Current - Collector (Ic) (Max)	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
BFR93AWH6327XTSA1 RF TRANS NPN 12V 6GHZ SOT323-3 Infineon Technologies	268	$0.47		Tape & Reel (TR)	Active	NPN	12V	6GHz	1.5dB ~ 2.6dB @ 900MHz ~ 1.8GHz	10.5dB ~ 15.5dB	300mW	70 @ 30mA, 8V	90mA	150°C (TJ)	Surface Mount	SC-70, SOT-323	PG-SOT323
MMBTH10LT1G RF TRANS NPN 25V 650MHZ SOT23-3 onsemi	2,694	$0.28		Tape & Reel (TR)	Active	NPN	25V	650MHz	-	-	225mW	60 @ 4mA, 10V	-	-55°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3 (TO-236)
BFS17NTA RF TRANS NPN 11V 3.2GHZ SOT23-3 Diodes Incorporated	868	$0.38		Tape & Reel (TR)	Active	NPN	11V	3.2GHz	-	-	330mW	56 @ 5mA, 10V	50mA	-55°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3
BFU690F,115 RF TRANS NPN 5.5V 18GHZ 4DFP NXP USA Inc.	662	$0.67		Tape & Reel (TR)	Active	NPN	5.5V	18GHz	0.6dB ~ 0.7dG @ 1.5GHz ~ 2.4GHz	15.5dB ~ 18.5dB	230mW	90 @ 20mA, 2V	100mA	150°C (TJ)	Surface Mount	SOT-343F	4-DFP
BFU520YX RF TRANS 2 NPN 12V 10GHZ SOT363 NXP USA Inc.	283	$0.93	Automotive, AEC-Q101	Tape & Reel (TR)	Active	2 NPN (Dual)	12V	10GHz	0.65dB @ 900MHz	19dB	450mW	60 @ 5mA, 8V	30mA	-40°C ~ 150°C (TJ)	Surface Mount	6-TSSOP, SC-88, SOT-363	6-TSSOP
BFU550AR RF TRANS NPN 12V 11GHZ TO236AB NXP USA Inc.	739	$0.37	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	12V	11GHz	0.6dB @ 900MHz	18dB	450mW	60 @ 15mA, 8V	50mA	-40°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23 (TO-236AB)
BFU660F,115 RF TRANS NPN 5.5V 21GHZ 4DFP NXP USA Inc.	339	$0.66		Tape & Reel (TR)	Active	NPN	5.5V	21GHz	0.6dB ~ 1.2dB @ 1.5GHz ~ 5.8GHz	12dB ~ 21dB	225mW	90 @ 10mA, 2V	60mA	150°C (TJ)	Surface Mount	SOT-343F	4-DFP
BFU730F,115 RF TRANS NPN 2.8V 55GHZ 4DFP NXP USA Inc.	1,043	$0.67		Tape & Reel (TR)	Active	NPN	2.8V	55GHz	0.8dB ~ 1.3dB @ 5.8GHz ~ 12GHz	-	197mW	205 @ 2mA, 2V	30mA	150°C (TJ)	Surface Mount	SOT-343F	4-DFP
BFU530WX RF TRANS NPN 12V 11GHZ SOT323-3 NXP USA Inc.	1,590	$0.58	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	12V	11GHz	0.6dB @ 900MHz	18.5dB	450mW	60 @ 10mA, 8V	40mA	-40°C ~ 150°C (TJ)	Surface Mount	SC-70, SOT-323	SC-70
BFU550R RF TRANS NPN 12V 11GHZ SOT143B NXP USA Inc.	67	$0.58	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	12V	11GHz	0.7dB @ 900MHz	21dB	450mW	60 @ 15mA, 8V	50mA	-40°C ~ 150°C (TJ)	Surface Mount	TO-253-4, TO-253AA	SOT-143B
BFU520AR RF TRANS NPN 12V 10GHZ TO236AB NXP USA Inc.	720	$0.60	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	12V	10GHz	0.7dB @ 900MHz	18dB	450mW	60 @ 5mA, 8V	30mA	-40°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23 (TO-236AB)
BFU630F,115 RF TRANS NPN 5.5V 21GHZ 4DFP NXP USA Inc.	1,348	$0.72		Tape & Reel (TR)	Active	NPN	5.5V	21GHz	0.75dB ~ 1.3dB @ 1.5GHz ~ 5.8GHz	13dB ~ 22.5dB	200mW	90 @ 5mA, 2V	30mA	150°C (TJ)	Surface Mount	SOT-343F	4-DFP
BFU790F,115 RF TRANS NPN 2.8V 25GHZ 4DFP NXP USA Inc.	761	$0.94		Tape & Reel (TR)	Active	NPN	2.8V	25GHz	0.4dB ~ 0.5dB @ 1.5GHz ~ 2.4GHz	-	234mW	235 @ 10mA, 2V	100mA	150°C (TJ)	Surface Mount	SOT-343F	4-DFP
BFU590GX RF TRANS NPN 12V 8.5GHZ SOT223 NXP USA Inc.	127	$1.17		Tape & Reel (TR)	Active	NPN	12V	8.5GHz	-	8dB	2W	60 @ 80mA, 8V	200mA	-40°C ~ 150°C (TJ)	Surface Mount	TO-261-4, TO-261AA	SC-73
BFU520XRR RF TRANS NPN 12V 10.5GHZ SOT143R NXP USA Inc.	1,749	$0.46	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	12V	10.5GHz	0.65dB @ 900MHz	20dB	450mW	60 @ 5mA, 8V	30mA	-40°C ~ 150°C (TJ)	Surface Mount	SOT-143R	SOT-143R
BFU520X215 NPN RF TRANSISTOR NXP USA Inc.	3,409	$0.12		Bulk	Active	-	-	-	-	-	-	-	-	-	-	-	-
BFU520X235 NPN RF TRANSISTOR NXP USA Inc.	4,156	$0.12		Bulk	Active	-	-	-	-	-	-	-	-	-	-	-	-
BFU550215 NPN RF TRANSISTOR NXP USA Inc.	1,274	$0.23		Bulk	Active	-	-	-	-	-	-	-	-	-	-	-	-
BFU550XRR RF TRANS NPN 12V 11GHZ SOT143R NXP USA Inc.	114	$0.43	Automotive, AEC-Q101	Tape & Reel (TR)	Active	NPN	12V	11GHz	0.7dB @ 900MHz	21.5dB	450mW	60 @ 15mA, 8V	50mA	-40°C ~ 150°C (TJ)	Surface Mount	SOT-143R	SOT-143R
BFU910FX RF TRANS NPN 9.5V SOT343F NXP USA Inc.	661	$0.45		Tape & Reel (TR)	Obsolete	NPN	9.5V	-	-	13.5dB	300mW	-	15mA	-40°C ~ 150°C (TJ)	Surface Mount	SOT-343F	4-DFP

About Bipolar RF Transistors

What are Bipolar RF Transistors?

Bipolar RF Transistors

Bipolar RF Transistors are a type of semiconductor device used to amplify or switch radio frequency (RF) signals. They operate by using a small input current to control a larger output current, effectively amplifying the signal. The basic operating principle involves three layers of semiconductor material, forming two p-n junctions. These layers are known as the emitter, base, and collector. When a small current is applied to the base, it allows a larger current to flow from the collector to the emitter, thus amplifying the signal. Bipolar RF Transistors are essential in RF applications due to their ability to handle high frequencies and power levels efficiently.

Types of Bipolar RF Transistors

1. NPN Bipolar RF Transistors

NPN Bipolar RF Transistors are the most common type, characterized by their ability to amplify signals when a positive voltage is applied to the base relative to the emitter. They are widely used in high-frequency applications due to their fast switching capabilities and high gain. NPN transistors are preferred for their efficiency in handling high power levels and are often used in RF amplifiers and oscillators.

2. PNP Bipolar RF Transistors

PNP Bipolar RF Transistors operate with a negative voltage applied to the base relative to the emitter. They are less common than NPN transistors but are used in specific applications where a negative supply voltage is available. PNP transistors are known for their ability to provide high current gain and are often used in complementary push-pull amplifier configurations.

3. High-Frequency Bipolar RF Transistors

These transistors are specially designed to operate at very high frequencies, often exceeding several gigahertz. They feature optimized structures to minimize parasitic capacitance and inductance, allowing them to perform efficiently in RF circuits. High-frequency bipolar RF transistors are crucial in applications such as wireless communication and radar systems.

How to choose Bipolar RF Transistors?

When selecting Bipolar RF Transistors, several key parameters must be considered:

Frequency Range: Ensure the transistor can operate efficiently within the desired frequency range of your application.
Gain: Choose a transistor with sufficient gain to meet the amplification requirements.
Power Handling: Consider the maximum power the transistor can handle without degradation.
Noise Figure: Select a transistor with a low noise figure for applications requiring high signal integrity.
Thermal Stability: Evaluate the transistor's ability to maintain performance under varying temperature conditions.

To assess product quality and reliability, review supplier datasheets, customer reviews, and industry certifications. Consider environmental factors such as temperature, humidity, and potential exposure to corrosive elements. Ensure proper installation with adequate heat dissipation and shielding to prevent interference.

Applications of Bipolar RF Transistors

1. Telecommunications

In the telecommunications industry, Bipolar RF Transistors are used in RF amplifiers and signal boosters to enhance the strength and quality of wireless communication signals. They are essential in base stations, mobile devices, and satellite communication systems.

2. Broadcasting

Broadcasting applications rely on Bipolar RF Transistors to amplify radio and television signals for transmission over long distances. They are used in transmitters and repeaters to ensure clear and consistent signal delivery to receivers.

3. Aerospace and Defense

In aerospace and defense, these transistors are integral to radar systems, electronic warfare, and communication systems. Their ability to handle high frequencies and power levels makes them suitable for demanding military applications.

4. Consumer Electronics

Bipolar RF Transistors are found in various consumer electronics, including radios, televisions, and wireless devices. They help improve signal reception and transmission, enhancing the overall user experience.

5. Industrial Automation

In industrial automation, these transistors are used in RF communication modules for remote monitoring and control systems. They enable reliable wireless communication between devices in automated processes.