2N3553 Silicon NPN Overlay Transistor

Overview

The 2N3553 is a silicon NPN overlay transistor housed in a TO-39 metal package. This device is designed for high-frequency amplification and switching applications, offering robust performance in demanding environments. The collector is connected to the case, which provides excellent thermal dissipation and mechanical stability. The 2N3553 is widely used in RF and general-purpose circuits due to its reliable characteristics and durable construction.

Features

• High-Frequency Performance: Optimized for RF and amplification applications with excellent gain-bandwidth product.
• Robust Construction: TO-39 metal package ensures durability and efficient heat dissipation.
• Collector Connected to Case: Enhances thermal management and simplifies mounting in high-power applications.
• Low Noise: Suitable for sensitive amplification circuits where signal integrity is critical.
• Wide Operating Range: Capable of functioning in a broad range of temperatures and voltages.

Applications

The 2N3553 is versatile and finds use in a variety of electronic circuits, including:

• RF Amplification: Used in radio frequency amplifiers due to its high-frequency response.
• Oscillators: Suitable for stable oscillator designs in communication systems.
• Switching Circuits: Efficiently handles high-speed switching applications.
• General-Purpose Amplification: Ideal for audio and signal amplification in consumer and industrial electronics.
• Military and Aerospace: Its rugged design makes it suitable for harsh environments.

Electrical Characteristics

The following table summarizes the key electrical characteristics of the 2N3553 transistor under typical operating conditions (unless otherwise specified):

Absolute Maximum Ratings

• Collector-Emitter Voltage (V_CEO): 40V
• Collector-Base Voltage (V_CBO): 60V
• Emitter-Base Voltage (V_EBO): 6V
• Collector Current (I_C): 600mA
• Total Power Dissipation (P_D): 1W at 25°C (derate linearly above 25°C)
• Operating Junction Temperature (T_J): -65°C to +200°C
• Storage Temperature Range (T_STG): -65°C to +200°C

Electrical Characteristics (T_A = 25°C unless noted)

• DC Current Gain (h_FE): 20 to 120 at I_C = 10mA, V_CE = 10V
• Collector-Emitter Saturation Voltage (V_CE(sat)): 0.3V (max) at I_C = 50mA, I_B = 5mA
• Base-Emitter Saturation Voltage (V_BE(sat)): 1.2V (max) at I_C = 50mA, I_B = 5mA
• Transition Frequency (f_T): 300MHz (min) at I_C = 10mA, V_CE = 10V
• Output Capacitance (C_ob): 4pF (max) at V_CB = 10V, f = 1MHz
• Noise Figure (NF): 4dB (typ) at I_C = 1mA, V_CE = 10V, f = 1kHz

Package Information

The 2N3553 is housed in a TO-39 metal can package, which provides excellent thermal and mechanical properties. Below are the key package details:

TO-39 Package Dimensions

• Case Material: Metal (typically steel or alloy)
• Lead Material: Tinned copper or alloy
• Mounting Style: Through-hole
• Weight: Approximately 0.5 grams
• Terminal Configuration: 3 leads (Emitter, Base, Collector)
• Case Finish: Electrically conductive, corrosion-resistant coating

Mechanical Drawing

The TO-39 package has the following dimensions (typical values):

• Diameter: 8.13mm (0.320 inches)
• Height: 5.59mm (0.220 inches)
• Lead Spacing: 5.08mm (0.200 inches) between adjacent leads
• Lead Length: 12.7mm (0.500 inches) nominal

Thermal Characteristics

The TO-39 package is designed for efficient heat dissipation, which is critical for maintaining performance in high-power applications. Key thermal properties include:

• Thermal Resistance, Junction-to-Case (R_θJC): 83.3°C/W
• Thermal Resistance, Junction-to-Ambient (R_θJA): 200°C/W (without heatsink)

Reliability and Quality

The 2N3553 is manufactured under stringent quality control standards to ensure long-term reliability. Key reliability metrics include:

• MIL-STD-750 Compliant: Meets military standards for environmental and mechanical stress testing.
• High MTBF: Mean Time Between Failures exceeds industry standards for similar devices.
• ESD Protection: Robust against electrostatic discharge within specified limits.

Handling and Storage

To maintain the integrity of the 2N3553, adhere to the following handling and storage guidelines:

• Store in anti-static packaging to prevent electrostatic damage.
• Keep in a dry environment with relative humidity below 60%.
• Avoid mechanical stress on leads during installation.
• Use proper soldering techniques to prevent overheating.

Conclusion

The 2N3553 is a high-performance NPN transistor designed for RF amplification, switching, and general-purpose applications. Its TO-39 metal package ensures durability and efficient thermal management, making it suitable for demanding environments. With its robust electrical characteristics and reliable construction, the 2N3553 remains a preferred choice for engineers in both commercial and industrial sectors.