What do you do? You reach for an
) : The breakdown voltage of the replacement must be than the original . Current Rating ( ICcap I sub cap C IDcap I sub cap D
Look for official component databases or archived semiconductor databooks from established manufacturers and distributors (such as NTE Electronics, ON Semiconductor, or STMicroelectronics). Use the "Find" Function (
(Collector-Base Voltage): The maximum voltage between collector and base. 3. Maximum Current Capacity ( ICcap I sub cap C The maximum collector current ( ICcap I sub cap C all type transistor equivalent pdf
The Ultimate Guide to Finding and Using Transistor Equivalents (With PDF Tools)
An absolute 100% direct equivalent rarely exists across different manufacturing brands. To avoid damaging the circuit or losing signal integrity, a substitute transistor must match or exceed the original’s parameters. TransistorEquivalents and Substitutes - World Radio History
| Original | Type | Vceo (V) | Ic (A) | hFE (min) | ft (MHz) | Equivalent Options | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | BC547 | NPN BJT | 45 | 0.1 | 110 | 300 | 2N3904, 2SC945, BC548 (higher voltage) | | 2N2222 | NPN BJT | 40 | 0.8 | 100 | 300 | PN2222, P2N2222, NTE123 | What do you do
Type the exact part number (e.g., 2N3904 or BC547 ).
Find the part number on the transistor (e.g., C945).
: A vital 311-page resource that includes extensive tables for European, American, and Japanese transistor types. You can find the International Transistor Equivalents Guide on manuals.plus. Allied Transistor Substitution Handbook : Available on World Radio History Use the "Find" Function ( (Collector-Base Voltage): The
Below is a quick reference table showcasing some of the most common everyday transistors and their widely accepted general-purpose equivalents: Original Transistor Type / Polarity Common Equivalent Options KN3904, BC547 (Note pinout), NTE123AP 2N3906 KN3906, BC557 (Note pinout), NTE159 BC547 BC548, BC549, 2N2222 (Note pinout), NTE123AP 2SC1815 KSC1815, BC547, 2N3904 TIP122 Darlington NPN TIP120, TIP121, NTE261 IRF540N N-Channel MOSFET RFP30N06, NTE2395 How to Safely Find and Use a Transistor Equivalent PDF
The equivalent transistor must be able to handle the voltage stress of the circuit. The collector-emitter voltage ( VCEOcap V sub cap C cap E cap O end-sub ) or drain-source voltage ( VDScap V sub cap D cap S end-sub