I'm using this transistor -
Motorola 9648 EBCK
(after a long search I have found that it's Motorola number is - 48-11043C07 ), but could not found any datasheet of it
so I think I have connected it correctly like shown in the image
please let me know if I'm right

my problem is that if I connect to is a device that work on ~ 500-600mA
it doesn't work , and I can see that he voltage on it is 7-8V
the S of the transistor is connected to 12V .
can someone help me find my mistake?
maybe I need another transistor?

Thanks,

 

Is it a FET or Bipolar Transistor? "EBC" is a big coincidence if it doesn't mean emitter, base, collector?

Post a schematic and you may get more help.

 

this is the circuit

 

It seems you are using the transistor as a PMOS. Are you sure this is a PMOS ?

With a multimeter you can check if it is a MOSFET or a BJT.

 

really?
how can I do this? I don't know how

 

Put your meter on Diode test, or Ohms and test between Base-Collector, or Base-Emitter.

 

Check this link on how to test a bipolar transistor.

http://www.allaboutcircuits.com/vol_3/chpt_4/3.html

 

Quick Google search says it is a NPN transistor not a PMOSfet. http://batboard.batlabs.com/viewtopic.php?f=1&t=39700

 

I have check
B and C -->I get ~20M
B and E -->I get O.L.

 

The thumbnail in your OP shows notation for a FET, and is reversed for the common ones like a 2n7000 etc.
S-G-D.
Max.

 

I have check
B and C -->I get ~20M
B and E -->I get O.L.

The diode check range should be reading in Volts.

bob

 

My first thought about the marking is that this is a private-label or house-marked bipolar transistor of completely unknown type, manufactured in the 48th week of 1996, with pinout Emitter-Base-Collector. That is a direct conflict with the schematic, but a very common marking from that period. Diode-testing the left and center pins should confirm or deny.

Why are the 555 timing components connected backwards?

ak