2N3055 NPN Power Transistors TO-3 60V 15A – Pack of 5

2N3055 NPN Power Transistors – TO-3 Metal Case | 60V / 15A | Pack of 5

Upgrade your electronics projects with this convenient 5-pack of classic 2N3055 NPN Power Transistors. Housed in the iconic TO-3 metal case, these workhorses of the electronics world are trusted by hobbyists, engineers, and repair technicians alike. With a generous 15A collector current rating and up to 100V collector-emitter voltage, they are well-suited for audio amplifiers, power supplies, motor drivers, and a wide range of switching and linear applications.

Key Features

• Transistor Type: NPN (2N3055)
• Package: TO-3 Metal Case – excellent heat dissipation and durability
• Collector Current (Ic): 15A
• Working Voltage: 60V (Max. 100V collector-emitter)
• Material: Stainless steel casing for anti-corrosion protection
• Mounting Hole Diameter: 4mm / 0.16 in – fits standard TO-3 heatsinks
• Condition: Brand new
• Pack Size: 5 transistors per order
• Package Weight: 48g / 1.69 oz

What's in the Box

• 5 × 2N3055 NPN Power Transistors (TO-3 Metal Case)

Common Applications

• Audio power amplifier output stages
• Linear and switching power supply regulators
• DC motor speed controllers
• High-current switching circuits
• DIY electronics repair and prototyping

Made in Mainland China.

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External Reference

For general electronics component standards and safety guidelines, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: Transistor

Frequently Asked Questions

Q: What is the 2N3055 transistor used for?

A: The 2N3055 is a classic NPN power transistor widely used in audio amplifier output stages, linear voltage regulators, switching power supplies, and DC motor control circuits. Its high current capacity (15A) and robust TO-3 metal package make it a go-to component for both hobbyists and professional electronics designers.

Q: What does the TO-3 metal case offer compared to plastic packages?

A: The TO-3 metal case provides superior thermal conductivity, allowing the transistor to dissipate heat more effectively when mounted to a heatsink. This makes it ideal for high-power applications where thermal management is critical to reliable performance.

Q: How many transistors are included in this listing?

A: This listing includes a pack of 5 × 2N3055 NPN Power Transistors in TO-3 metal cases, giving you spares for prototyping, testing, or completing your project without delays.

Q: Are these compatible with standard TO-3 heatsinks?

A: Yes. The mounting hole diameter is 4mm (0.16 in), which is the standard size for TO-3 heatsink mounting hardware, ensuring easy integration into your existing builds or enclosures.