BLY87 - N-P-N Silicon Planar Epitaxial Transistor

Overview

The BLY87 is an N-P-N silicon planar epitaxial transistor designed for high-frequency (h.f.) and mobile applications. It is optimized for use in Class-A, Class-B, and Class-C amplifier circuits, offering robust performance in RF and switching applications. The transistor is characterized by its high power gain, excellent thermal stability, and low saturation voltage, making it suitable for demanding environments.

Manufactured using advanced epitaxial technology, the BLY87 ensures consistent performance and reliability. Its construction minimizes parasitic effects, enhancing its efficiency in high-frequency operations. The transistor is widely used in communication systems, industrial equipment, and RF power amplification.

Features

• High Power Gain: Optimized for RF amplification with superior gain characteristics.
• Low Saturation Voltage: Ensures efficient switching and reduced power dissipation.
• Excellent Thermal Stability: Robust design for reliable operation under varying thermal conditions.
• Wide Frequency Range: Suitable for applications up to VHF and UHF bands.
• High Current Handling: Capable of sustaining high collector currents for power applications.
• Low Noise Figure: Ideal for sensitive RF and communication circuits.
• Planar Epitaxial Construction: Ensures consistent performance and reliability.

Applications

The BLY87 transistor is versatile and finds use in a variety of high-frequency and power applications, including:

• RF Power Amplifiers: Used in mobile and base station transmitters.
• HF and VHF Communication Systems: Suitable for amateur radio and commercial communication equipment.
• Class-A, B, and C Amplifiers: Optimized for linear and non-linear amplification.
• Industrial RF Generators: Employed in induction heating and plasma generation systems.
• Switching Circuits: High-speed switching applications due to low saturation voltage.
• Military and Aerospace: Reliable performance in critical communication systems.

Electrical Characteristics

The following tables outline the key electrical specifications of the BLY87 transistor under standard test conditions (unless otherwise specified).

Absolute Maximum Ratings

• Collector-Emitter Voltage (V_CEO): 36V
• Collector-Base Voltage (V_CBO): 60V
• Emitter-Base Voltage (V_EBO): 5V
• Collector Current (I_C): 1A (continuous)
• Total Power Dissipation (P_tot): 10W (at T_c = 25°C)
• Junction Temperature (T_j): 150°C
• Storage Temperature Range (T_stg): -55°C to +150°C

Thermal Characteristics

• Thermal Resistance, Junction-to-Case (R_thJC): 10°C/W
• Thermal Resistance, Junction-to-Ambient (R_thJA): 70°C/W

Small-Signal Characteristics (T_a = 25°C)

• DC Current Gain (h_FE): 20 - 70 (at I_C = 100mA, V_CE = 5V)
• Transition Frequency (f_T): 150MHz (typ.)
• Output Capacitance (C_ob): 10pF (max.)
• Input Impedance (Z_in): 5Ω (typ. at 100MHz)

Package Information

The BLY87 is available in a TO-39 metal can package, which provides excellent thermal dissipation and mechanical durability. The package is hermetically sealed, ensuring long-term reliability in harsh environments.

Package Dimensions

• Case Material: Metal (Kovar or equivalent)
• Lead Material: Copper alloy
• Weight: Approx. 1.5 grams
• Mounting Style: Through-hole
• Pin Configuration:
  • Pin 1: Emitter
  • Pin 2: Base
  • Pin 3: Collector (case)

Mechanical Drawing

(Note: A detailed mechanical drawing would typically be included here, showing dimensions such as diameter, height, lead spacing, and tolerances.)

Reliability and Compliance

The BLY87 transistor is manufactured under strict quality control standards, ensuring high reliability and consistency. It complies with industry standards for RF power transistors, including:

• RoHS Compliance
• MIL-STD-750 (for ruggedized applications)
• ESD Protection (up to 1kV Human Body Model)

Conclusion

The BLY87 N-P-N silicon planar epitaxial transistor is a high-performance component designed for RF power amplification and switching applications. Its combination of high power gain, thermal stability, and robust packaging makes it an excellent choice for demanding communication and industrial systems. Engineers and designers can rely on the BLY87 for consistent performance in high-frequency and power-critical circuits.