Overview
The BFR520,235 is an NPN silicon planar epitaxial transistor manufactured by NXP USA Inc. This component is designed for high-frequency applications and is packaged in a SOT23 (TO-236AB) surface-mount package. The transistor is known for its high power gain, low noise figure, and high transition frequency, making it suitable for a wide range of RF front-end wideband applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Collector-Base Voltage (VCBO) | - | - | 20 | V | |
| Collector-Emitter Voltage (VCES) | RBE = 0 Ω | - | 15 | V | |
| Collector Current (IC) | - | - | 70 | mA | |
| Total Power Dissipation (Ptot) | Up to Tsp = 97°C | - | 300 | mW | |
| DC Current Gain (hFE) | IC = 20 mA; VCE = 6 V | 60 | 120 | 250 | - |
| Transition Frequency (fT) | IC = 20 mA; VCE = 6 V; f = 1 GHz | - | 9 | - | GHz |
| Noise Figure (Fmin) | @ 900 MHz | - | 1.1 ~ 2.1 | - | dB |
| Operating Temperature (TJ) | - | - | 175 | °C | |
| Package / Case | - | - | TO-236-3, SC-59, SOT-23-3 | - |
Key Features
- High power gain
- Low noise figure (1.1 dB ~ 2.1 dB @ 900 MHz)
- High transition frequency (9 GHz)
- Gold metallization for excellent reliability
- Surface-mount package (SOT23)
Applications
- RF front-end wideband applications in the GHz range
- Analog and digital cellular telephones
- Cordless telephones (CT1, CT2, DECT, etc.)
- Radar detectors
- Pagers and satellite TV tuners (SATV)
- Repeater amplifiers in fiber-optic systems
Q & A
- What is the maximum collector-emitter voltage of the BFR520,235 transistor?
The maximum collector-emitter voltage (VCES) is 15 V.
- What is the transition frequency of the BFR520,235 transistor?
The transition frequency (fT) is 9 GHz.
- What is the maximum collector current of the BFR520,235 transistor?
The maximum collector current (IC) is 70 mA.
- What is the typical noise figure of the BFR520,235 transistor at 900 MHz?
The typical noise figure (Fmin) at 900 MHz is between 1.1 dB and 2.1 dB.
- What is the package type of the BFR520,235 transistor?
The package type is SOT23 (TO-236AB).
- What are the typical applications of the BFR520,235 transistor?
Typical applications include RF front-end wideband applications, cellular telephones, cordless telephones, radar detectors, and repeater amplifiers in fiber-optic systems.
- What is the maximum operating temperature of the BFR520,235 transistor?
The maximum operating temperature (TJ) is 175°C.
- Is the BFR520,235 transistor RoHS compliant?
Yes, the BFR520,235 transistor is RoHS compliant.
- What is the maximum total power dissipation of the BFR520,235 transistor?
The maximum total power dissipation (Ptot) is 300 mW.
- What is the DC current gain (hFE) of the BFR520,235 transistor at 20 mA and 6 V?
The DC current gain (hFE) at 20 mA and 6 V is minimum 60.
