The BD35231 transistor is an NPN silicon power transistor with a Darlington configuration, commonly used in linear power supplies and high-fidelity audio circuits. It is characterized by its high collector current, low saturation voltage, and good power dissipation.

To find a compatible replacement, we must look for transistors that share similar characteristics. Key parameters to consider are:

* **Transistor type:** NPN Darlington. * **Collector-emitter voltage (Vce):** The BD35231 has a maximum Vce of 100V. A replacement should have an equal or higher value.
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