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Uglytruth

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Motorola transistor MJ14003 is no longer available. What is the best replacement?
 
When looking for a replacement for the MJ14003 transistor, there are a few factors to consider in order to find the best alternative. The MJ14003 is a high-power NPN silicon transistor designed for general purpose amplifier and switching applications. Here are some considerations to keep in mind when selecting a replacement:

1. **Electrical Characteristics**: The replacement transistor should have similar electrical characteristics such as voltage, current, power dissipation, gain, and frequency response to ensure proper functionality in the circuit.

2. **Package Type**: Make sure the replacement transistor has a compatible package type with the MJ14003 to fit on the same footprint on the circuit board.

3. **Availability and Reliability**: Look for a replacement transistor that is readily available and from a reliable manufacturer to ensure consistent performance and quality.

4. **Cross-Reference Databases**: Utilize online cross-reference databases or tools provided by semiconductor manufacturers to find suitable replacements for discontinued components like the MJ14003.

Given these considerations, some potential replacements for the MJ14003 transistor could be the NTE312 (available as an equivalent replacement), TIP41C, or MJ15003. However, it is important to thoroughly review the datasheets of these suggested replacements and ensure they meet the requirements of your specific application before finalizing the choice.
 
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