BFR93 NPN RF Transistor Technical Summary

Overview

The BFR93 is a high-performance NPN silicon RF transistor designed for applications requiring high power gain and low noise figure. Packaged in compact SOT-23 and SOT-23R variants, this component is optimized for use in high-frequency circuits. With its high transition frequency and excellent gain characteristics, the BFR93 is particularly suited for RF amplification stages in communication systems.

Features

• High power gain for superior signal amplification
• Low noise figure (typically 1.0dB at 1GHz) for improved signal integrity
• High transition frequency (f_T up to 6GHz) enabling high-frequency operation
• Available in space-saving SOT-23 (BFR93) and SOT-23R (BFR93R) packages
• Robust construction with plastic case for durability
• Marking: R1 for SOT-23, R4 for SOT-23R package variants

Applications

The BFR93 is ideal for a wide range of RF applications, including:

• RF amplifiers in communication systems
• Low-noise amplifier (LNA) stages
• VHF/UHF receiver front-ends
• Wireless communication equipment
• Signal processing circuits
• Oscillator circuits
• RF signal amplification in test equipment

Electrical Characteristics

Absolute Maximum Ratings

Stresses exceeding these ratings may cause permanent device damage.

• Collector-Base Voltage (V_CBO): 20V
• Collector-Emitter Voltage (V_CEO): 12V
• Emitter-Base Voltage (V_EBO): 2V
• Collector Current (I_C): 40mA
• Total Power Dissipation (P_tot): 300mW at T_amb ≤ 25°C
• Operating Junction Temperature (T_j): -55°C to +150°C
• Storage Temperature Range (T_stg): -55°C to +150°C

Typical Performance Characteristics

(Unless otherwise specified, at T_amb = 25°C, V_CE = 8V, I_C = 10mA)

• DC Current Gain (h_FE): 40-120
• Transition Frequency (f_T): 6GHz (typical)
• Noise Figure (NF): 1.0dB typical at 1GHz
• Power Gain (G_p): 15dB typical at 1GHz
• Collector-Emitter Saturation Voltage (V_CE(sat)): 0.3V max at I_C = 10mA, I_B = 1mA

Package Information

SOT-23 Package (BFR93)

• Package Type: SOT-23 (TO-236)
• Marking Code: R1
• Pin Configuration:
  • Pin 1: Collector
  • Pin 2: Base
  • Pin 3: Emitter
• Package Dimensions: 2.9mm × 1.3mm × 1.1mm (typical)
• Moisture Sensitivity Level (MSL): 1 (Unlimited floor life at ≤30°C/85%RH)

SOT-23R Package (BFR93R)

• Package Type: SOT-23R (SC-75)
• Marking Code: R4
• Pin Configuration:
  • Pin 1: Collector
  • Pin 2: Base
  • Pin 3: Emitter
• Package Dimensions: 2.9mm × 1.6mm × 1.1mm (typical)
• Moisture Sensitivity Level (MSL): 1 (Unlimited floor life at ≤30°C/85%RH)

Thermal Characteristics

• Thermal Resistance, Junction to Ambient (R_thJA): 357°C/W (SOT-23)
• Thermal Resistance, Junction to Case (R_thJC): 125°C/W (SOT-23)

Handling and Mounting

For optimal performance and reliability:

• Follow standard ESD precautions during handling
• Use recommended soldering profiles:
  • Wave soldering: 260°C peak temperature for ≤10 seconds
  • Reflow soldering: 235°C peak temperature for ≤30 seconds
• Maintain PCB cleanliness to prevent contamination
• Avoid mechanical stress during assembly

Reliability Data

• ESD Sensitivity: Class 1C (Human Body Model, 250V)
• Moisture Resistance: Passes JEDEC J-STD-020 moisture resistance testing
• Flammability Rating: UL 94V-0

Ordering Information

• BFR93: Standard SOT-23 package (tape and reel, 3000 units per reel)
• BFR93R: SOT-23R package (tape and reel, 3000 units per reel)

Design Considerations

When designing with the BFR93:

• Ensure proper impedance matching for optimal RF performance
• Maintain short trace lengths to minimize parasitic effects
• Implement proper grounding techniques for stable operation
• Consider thermal management for high-power applications
• Use appropriate DC biasing for desired operating point

Environmental Compliance

• RoHS compliant (2011/65/EU)
• Halogen-free according to IEC 61249-2-21
• REACH compliant (EC 1907/2006)