Thanks for your answer.The device that i want to replace has a case like a 2n2222 and 3 legs.
I ve an answer for a fellow in the forum that may be replaced for a BST74A 200v n-channel.Thanks for your intressed in help me
The way you describe the component and the marking upon it imply that it is Philips BST74A transistor.
If you have any clue of what the circuit does, see if an N-channel D-MOS transistor fits.