![]() |
|
|
Thread Tools | Display Modes |
|
![]() |
#1 |
New Member
Join Date: Aug 2019
City & State: Dublin
My Country: Ireland
I'm a: Knowledge Seeker
Posts: 9
|
![]() Hello, I need help identifying this component. Bottom right leg is shorted to the left side.
Looks like it says 301LA. Thank you. ![]() |
![]() |
![]() |
![]() |
#2 |
Badcaps Veteran
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 8,843
|
![]() It could be due to the low value of the resistor across the pins, is it marked as D5 on the board?
Last edited by R_J; 12-08-2022 at 09:56 PM.. |
![]() |
![]() |
![]() |
#3 |
New Member
Join Date: Aug 2019
City & State: Dublin
My Country: Ireland
I'm a: Knowledge Seeker
Posts: 9
|
![]() |
![]() |
![]() |
![]() |
#4 |
Badcaps Veteran
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 8,843
|
![]() |
![]() |
![]() |
![]() |
#5 |
New Member
Join Date: Aug 2019
City & State: Dublin
My Country: Ireland
I'm a: Knowledge Seeker
Posts: 9
|
![]() I followed the centre pin the ground of the motor that's not spinning for the brush. There's quite a few of same package but different markings.
|
![]() |
![]() |
![]() |
#6 |
Badcaps Veteran
Join Date: Dec 2010
City & State: Alberta
My Country: Canada
Posts: 3,066
|
![]() It looks more like smd marking S01LA but I cannot find it.
|
![]() |
![]() |
![]() |
#7 |
New Member
Join Date: Aug 2019
City & State: Dublin
My Country: Ireland
I'm a: Knowledge Seeker
Posts: 9
|
![]() |
![]() |
![]() |
![]() |
#8 |
Badcaps Veteran
Join Date: Dec 2010
City & State: Alberta
My Country: Canada
Posts: 3,066
|
![]() You'd have to trace out how the motor is switched on - is it this mosfet or a N-ch somewhere else. If it shorted I would think the motor will stay on.
Otherwise this is a motor back EMF diode. It's not a (reversible) motor needing a 4-mosfet H-bridge? "S01" I found as SOT-23 P-ch. MOSFET by Samhop Microelectronics Taiwan. STS2301A -20V/-2.6A 95mΩ STS2301 -20V/-3.4A 60mΩ There's no marking code data on the website or datasheets to confirm. One part uses a 3 digit marking with tiny manufacturing code rotated. Many other generic makers of the 2301, as a NXP2301P, AO2301 etc. out of the third-world. |
![]() |
![]() |
![]() |
#9 | |
New Member
Join Date: Aug 2019
City & State: Dublin
My Country: Ireland
I'm a: Knowledge Seeker
Posts: 9
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
#10 |
Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,684
|
![]() I found an S01 as a FJX3001R pre biased NPN, SOT 323. I can’t tell if it is an S or a 3.
Last edited by CapLeaker; 12-09-2022 at 09:53 AM.. |
![]() |
![]() |
![]() |
#11 |
Badcaps Veteran
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 8,843
|
![]() Is the other device marked as D? if it is how does it check, does it check like a dual diode, or like a transistor?
Where is it in the circuit? is it across the motor? Post a clear picture of the whole area of the board Last edited by R_J; 12-10-2022 at 06:54 PM.. |
![]() |
![]() |
![]() |
#12 |
Badcaps Veteran
Join Date: Dec 2010
City & State: Alberta
My Country: Canada
Posts: 3,066
|
![]() I think D5 is the large part under the Q18 silkscreen and might not apply. You can a current-sense resistor R155 as well.
Usually you'd see a N-ch. mosfet turning a motor on and off. If it's reversible, then a P-ch up top on the H-bridge. The only part that doesn't fit is OP finds the part shorted yet the motor will not run. If true then there is another problem, or it's the gate shorted. |
![]() |
![]() |
![]() |
#13 |
Badcaps Veteran
Join Date: Jan 2016
City & State: Sochi
My Country: Russia
I'm a: Knowledge Seeker
Posts: 2,103
|
![]() Similar to ST2301A.
|
![]() |
![]() |
![]() |
#14 |
Badcaps Veteran
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 8,843
|
![]() Thank you lotas, that sure looks like it.
So I guess the D5 designator IS for another component. Last edited by R_J; 12-11-2022 at 01:16 PM.. |
![]() |
![]() |
![]() |
#15 |
New Member
Join Date: Aug 2019
City & State: Dublin
My Country: Ireland
I'm a: Knowledge Seeker
Posts: 9
|
![]() My apologies on not replying, Yes the gate was shorted.
I'm guessing this is the one. https://www.aliexpress.com/item/4000312333823.html Thank you so much for all the help. Hope it works. Shall i upload a full pic? |
![]() |
![]() |
![]() |
Thread Tools | |
Display Modes | |
|
|