2N3440 - DUAL SILICON PLANAR EPITAXIAL NPN TRANSISTOR

Overview

The 2N3440 is a high-performance dual silicon planar epitaxial NPN transistor designed for applications requiring high voltage and reliable operation. This component is engineered to deliver robust performance in demanding environments, making it suitable for a wide range of industrial, commercial, and military applications. The 2N3440 features excellent gain characteristics, low leakage currents, and high breakdown voltages, ensuring stable operation under varying load conditions.

Manufactured using advanced epitaxial planar technology, the 2N3440 offers superior thermal stability and consistent electrical performance. Its dual NPN configuration allows for flexible circuit design, enabling designers to implement it in push-pull amplifiers, high-voltage switches, and other critical applications.

Features

• Dual NPN Configuration: Two independent NPN transistors in a single package, providing design flexibility and space savings.
• High Voltage Capability: Designed for high-voltage applications, with collector-emitter breakdown voltage (V_CEO) ratings up to 300V.
• Low Leakage Current: Minimal collector cutoff current (I_CEO), ensuring efficient operation in sensitive circuits.
• High Current Gain (h_FE): Offers excellent current amplification, typically ranging from 40 to 120, depending on operating conditions.
• Epitaxial Planar Construction: Provides enhanced thermal performance and reliability, reducing the risk of thermal runaway.
• Wide Operating Temperature Range: Suitable for use in environments with temperatures ranging from -65°C to +200°C.
• Matched Transistor Pair: Ensures consistent performance in differential amplifier and other matched-pair applications.

Applications

The 2N3440 is versatile and finds use in a variety of high-voltage and general-purpose applications, including:

• High-Voltage Switching: Used in power supply circuits, inverters, and voltage regulators.
• Audio Amplifiers: Ideal for push-pull and class AB amplifier stages due to its matched characteristics.
• Industrial Control Systems: Provides reliable switching and amplification in motor control and automation systems.
• Telecommunications: Suitable for signal processing and RF amplification in communication equipment.
• Medical Electronics: Used in high-voltage pulse generators and diagnostic equipment.
• Military and Aerospace: Meets stringent reliability requirements for critical systems.

Electrical Characteristics

The following table summarizes the key electrical specifications of the 2N3440 transistor under typical operating conditions (T_A = 25°C unless otherwise specified):

Absolute Maximum Ratings

• Collector-Emitter Voltage (V_CEO): 300V
• Collector-Base Voltage (V_CBO): 400V
• Emitter-Base Voltage (V_EBO): 6V
• Collector Current (I_C): 1A (continuous)
• Total Power Dissipation (P_D): 1W at 25°C (derate linearly above 25°C)
• Operating and Storage Temperature Range: -65°C to +200°C

Typical Electrical Characteristics

• DC Current Gain (h_FE): 40 to 120 at I_C = 10mA, V_CE = 10V
• Collector-Emitter Saturation Voltage (V_CE(sat)): ≤ 0.5V at I_C = 500mA, I_B = 50mA
• Base-Emitter Saturation Voltage (V_BE(sat)): ≤ 1.2V at I_C = 500mA, I_B = 50mA
• Collector Cutoff Current (I_CEO): ≤ 100nA at V_CE = 300V
• Transition Frequency (f_T): 50MHz (typical) at I_C = 10mA, V_CE = 20V

Package Information

The 2N3440 is available in a hermetically sealed TO-5 metal can package, which provides excellent thermal and mechanical performance. The package is designed for through-hole mounting and features a rugged construction suitable for harsh environments.

Package Dimensions

• Case Style: TO-5 (2-lead)
• Body Diameter: 8.13mm (0.320 inches)
• Height: 6.35mm (0.250 inches) excluding leads
• Lead Diameter: 0.51mm (0.020 inches)
• Lead Spacing: 5.08mm (0.200 inches) between centers
• Weight: Approximately 1.5 grams

Pin Configuration

The 2N3440 features a standard TO-5 pinout configuration:

• Pin 1: Emitter (E) of Transistor 1
• Pin 2: Base (B) of Transistor 1
• Pin 3: Collector (C) of Transistor 1 (connected to case)
• Pin 4: Emitter (E) of Transistor 2
• Pin 5: Base (B) of Transistor 2
• Pin 6: Collector (C) of Transistor 2 (connected to case)

Reliability and Compliance

The 2N3440 is manufactured under strict quality control standards to ensure long-term reliability. It complies with industry standards for performance and environmental resilience, including:

• MIL-STD-883 for military-grade applications
• RoHS compliance for lead-free manufacturing
• ESD protection to prevent damage during handling

Conclusion

The 2N3440 dual NPN transistor is a high-voltage, high-reliability component suitable for a broad range of applications. Its robust construction, excellent electrical characteristics, and flexible dual-transistor configuration make it an ideal choice for designers requiring dependable performance in demanding environments. Whether used in industrial controls, audio amplifiers, or high-voltage switching circuits, the 2N3440 delivers consistent and reliable operation.