# Power transistor identification

I am led to believe that this transistor came out of a (bass) woofer - one one speaker, and only one transistor (not two).

This is the best photo I can get:

L70M09CV
MCCO - 0031


Googling L70M09CV comes up with nothing related.

Any idea what it is, a datasheet, and/or a suitable alternative?

I don't have a photo of the PCB, as it belongs to a Thai friend, who speaks no English, and my Thai isn't fluent, so more details are either sketchy or non-existant. I may be able to get a photo of the PCB tomorrow.

FWIW, I get 0.6V across the collector-base and emitter-base junctions, when forward biased - when checking it and assuming it is an NPN transistor.

• Ah, the second number is an 8 not 0... well spotted. Many thanks. I thought I might have been a regulator and did ask my friend if it was from the power supply part of the circuit but they said no... but then he said a lot of stuff that I didn't understand :-). – Greenonline Nov 22 '18 at 3:22