50pcs TO-92 Transistor Kit – 2N5401 & 2N5551 NPN PNP DIP

$8.17 $9.49

50-Piece TO-92 Transistor Assortment – 2N5401 & 2N5551

Stock your workbench with this versatile transistor kit featuring 25x 2N5401 (PNP) and 25x 2N5551 (NPN) through-hole transistors in the compact TO-92 package. Perfect for electronics hobbyists, students, engineers, and makers who need reliable general-purpose transistors for amplifier circuits, switching applications, and DIY electronics projects.

Key Features

Combo Pack: 50 transistors total — 25x 2N5401 (PNP) + 25x 2N5551 (NPN)
Package Type: TO-92 Through-Hole (DIP) — easy to solder on breadboards and PCBs
Type: Triode Transistors — ideal for signal amplification and switching
Condition: Brand new components
Model Numbers: 2N5551 / 2N5401
High-Concerned Chemicals: None
Great for prototyping, repair work, and keeping your component drawer well-stocked

Specifications

Package	TO-92 Through-Hole
Transistor Type	Triode Transistor (NPN + PNP)
Models Included	2N5551 (NPN) × 25 pcs, 2N5401 (PNP) × 25 pcs
Total Quantity	50 pieces
Condition	New
Country of Origin	Made in Mainland China

Who Is This Kit For?

Whether you're a seasoned electronics engineer, a university student building lab circuits, or a hobbyist experimenting with Arduino and Raspberry Pi projects, this complementary NPN/PNP transistor pair covers a wide range of everyday circuit needs. The TO-92 form factor makes these components universally compatible with standard breadboards and PCBs.

Related Products You May Like

Learn more: OSHA on personal protective equipment

Frequently Asked Questions

Q: What is the difference between the 2N5401 and 2N5551 transistors?

A: The 2N5551 is an NPN (Negative-Positive-Negative) general-purpose amplifier transistor, while the 2N5401 is its PNP (Positive-Negative-Positive) complement. Together they are commonly used as complementary pairs in push-pull amplifier stages and switching circuits.

Q: Are these transistors compatible with standard breadboards and PCBs?

A: Yes! Both the 2N5401 and 2N5551 come in the standard TO-92 through-hole package, which fits directly into breadboard holes and standard PCB footprints — no adapters needed.

Q: How many transistors are included in this kit?

A: This kit includes 50 transistors total: 25 pieces of the 2N5551 (NPN) and 25 pieces of the 2N5401 (PNP), giving you a balanced complementary pair assortment for your projects.