Hi Genady, I have included the parts list (in case you need some other parts) and a zoomed picture, but they are pretty low resolution to start with.
I don't think the device is a transistor/mosfet, I believe it is a resistor, it is the same package size as the snubber resistors from the larger frame sizes (of which there are usually 6 of them), but in the case of smaller drives, I think it is the balancing resistor.
This acts as a potential divider and creates a 0VDC point from which the power transistors can switch.
Thats my guess anyway.
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Those who understand Binary, and those who don't.