All - Transistor Equivalent Book

Even the best book cannot account for parasitic oscillations or subtle gain differences. Always test your substitute at 50% of rated voltage and current first.

European transistors often follow the Pro-Electron naming system, where: all transistor equivalent book

Use a parametric search engine (e.g., Mouser, DigiKey, or Octopart). Enter: NPN, Vceo > 40V, Ic > 200mA, hFE > 100, TO-92. Even the best book cannot account for parasitic

| Original Part | NTE/ECG Equivalent | Common Alternatives | |---------------|--------------------|--------------------| | 2N2222 | NTE123AP | PN2222, P2N2222 | | 2N3904 | NTE123AP | BC547, BC548, 2SC1815 | | BC547 | NTE123AP | 2N3904, 2SC1815 | | 2SC945 | NTE85 | BC547, 2N3904 | | 2SC1815 | NTE85 | BC546, 2N3904 | | MPSA18 | NTE46 | BC549C | or Octopart). Enter: NPN