SJ9089A Motorola Transistor
I am looking for a datasheet for a Motorola SJ9089A transistor used in a Mettler ultrasonic cleaner.
I found a posting on this site that says you can use a MJ16018 as a substitute. I tried that transistor and also tried an NTE replacement. Both seemed to work in the circuit, but caused a 450v 4.7mf cap to heat up and explode. The circuit continues to work without the cap until the unit is shut down. The next time you start the unit it blowes the fuse and the transistor is shorted. This device has two identical circuits that drive 2 transducers. If I swap the transistors the the circuit with the original SJ9089A always works fine.
I am looking for a datasheet for a Motorola SJ9089A transistor used in a Mettler ultrasonic cleaner.
I found a posting on this site that says you can use a MJ16018 as a substitute. I tried that transistor and also tried an NTE replacement. Both seemed to work in the circuit, but caused a 450v 4.7mf cap to heat up and explode. The circuit continues to work without the cap until the unit is shut down. The next time you start the unit it blowes the fuse and the transistor is shorted. This device has two identical circuits that drive 2 transducers. If I swap the transistors the the circuit with the original SJ9089A always works fine.
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