2N3055 – 15A NPN Bipolar Power Transistor – Microchip Technology

The Microchip Technology 2N3055 is a rugged NPN bipolar junction transistor designed for high-power amplification and switching applications. Engineered for robustness and thermal stability, this industry-standard component delivers reliable performance in demanding environments. PCX supplies genuine Microchip 2N3055 transistors with guaranteed quality, same-day shipping, and dedicated technical support.

Key Features

• High Current Handling: 15A continuous collector current
• Voltage Resilience: 70V collector-emitter breakdown voltage
• Thermal Stability: Operates from -65°C to 200°C junction temperature
• Power Rating: 6W maximum power dissipation
• Gain Performance: Minimum DC current gain (hFE) of 20 @ 4A/4V

Technical Specifications

• Transistor Type: NPN Bipolar Junction Transistor (BJT)
• Package: TO-3 metal can (TO-204AA)
• Mounting: Through-hole
• Saturation Voltage: 2V max @ 10A collector current
• Cutoff Current: 1mA max collector cutoff
• Compliance: MIL-PRF-19500/407 certified

Common Applications

• Power supply regulators and voltage controllers
• Audio amplifier output stages
• Motor drive circuits and solenoid controls
• DC-DC converters and inverters
• Linear power modules and industrial equipment

About Microchip Technology

Microchip Technology stands as a global leader in semiconductor solutions, renowned for innovation in microcontrollers, analog, and power management products. With over three decades of industry expertise, the company maintains rigorous quality standards certified under MIL-PRF-19500 and automotive-grade specifications. Their commitment to reliability makes Microchip components the preferred choice for mission-critical designs across aerospace, industrial, and consumer sectors.

The manufacturer’s vertically integrated production ensures consistent performance and traceability from wafer fabrication to final testing. Microchip’s extensive portfolio of power transistors, including the 2N-series, undergoes stringent qualification processes to guarantee thermal stability, current handling, and longevity—attributes essential for high-stress applications where component failure is not an option.

About Bipolar Junction Transistors

Bipolar Junction Transistors (BJTs) are fundamental semiconductor devices that amplify current or switch electronic signals using both electron and hole charge carriers. NPN transistors like the 2N3055 feature a layered structure where a positive-doped base separates two negative-doped layers. When current flows through the base-emitter junction, it controls larger current flow between collector and emitter—enabling power control in circuits handling substantial loads.

Power BJTs remain indispensable in analog electronics due to their linear response characteristics, high current density, and predictable failure modes. Unlike MOSFETs, BJTs offer superior performance in linear regulation applications and high-temperature environments. The TO-3 package variant provides exceptional thermal conductivity for heat dissipation, making it ideal for audio amplifiers, power supplies, and motor controllers requiring robust thermal management.

Packaging Options

Available in Bulk packaging for prototyping and repair workflows. Contact PCX for reel packaging inquiries.

Frequently Asked Questions

Q: What heatsink is recommended for the 2N3055 at full load?
A: A heatsink with thermal resistance ≤ 2.5°C/W is advised for continuous 6W operation.

Q: Can this replace older 2N3055 versions from other manufacturers?
A: Yes, Microchip’s 2N3055 maintains backward compatibility with industry-standard pinouts and specifications.

Q: Is this suitable for linear power supply designs?
A: Absolutely. Its high current gain and thermal stability make it ideal for linear regulation circuits.

Q: What distinguishes BJTs from MOSFETs in power applications?
A: BJTs offer better linearity and surge tolerance, while MOSFETs typically provide higher switching speeds.

Q: Does PCX provide datasheets for this component?
A: Yes. Download the complete 2N3055 datasheet directly from our product page.

Q: Are these transistors RoHS compliant?
A> This specific variant complies with MIL-PRF-19500 standards. Contact PCX for RoHS-certified alternatives.

Product image is representational. Actual product may vary.

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