Electronic – Can anyone identify this resistive component
identificationresistors
I got this components:
Resistance about 9 to 10 Ohms.
I am unable to identify this components.
edit:
Thank you so much answering this question.
Yes it is a 0.15A PTC fuse. ITrip is about 0.5A and it is very slow.
Best Answer
I believe they are Tyco/Raychem TRF600-150, high-voltage resettable fuses, rated for 250VDC nominal (600VAC interrupt rating) and 150mA nominal.
I found a Tyco/Raychem datasheet that seems to match general part package and specs. Excerpt from page 10 (note the minimum resistance of 6Ω in the datasheet, which matches your measurement):
Raychem went defunct in 1999, and were acquired by Tyco, so maybe they are now available under that brand name. If you search Ebay for "Raychem 600 150", you'll find various listings for parts that look exactly like yours.
One example, from this listing, claiming to sell "RAYCHEM PTC Resettable Fuse Radial Leads .16A/.32A 250V 3A NEW 5/PKG":
The bottom row on these says XS1G rather than your WN1U. This is probably a production series code, which differs from batch to batch.
Here is another listing, claiming to sell "( 25 PC. ) RAYCHEM/TYCO PTC TR600-150-2 RESETTABLE POLYSWITCH CIRCUIT PROTECTOR":
Your best bet is not to identify what part it is, but what function it had and replace that function. You will have to unsolder the part anyway. After that, you can start working out if and how it is connected to the USB port. If it is, you know what it does and can replace it with something else.
It is possible USB might work after you unsolder the part. Perhaps it is just some peripheral part, not the power supply to USB. In this case, the fried part might just be shorting USB power, which then shuts down.
If not, maybe (danger!) you can connect the USB 5V directly with Mainboard 5V from, say the harddisk plug. This would change how safe USB is (usually it is limited to a certain amperage), and you could fry the notebook with USB. But then again it is already toasted...
This looks like a potentiometer with a built in on-off switch on the back.
When you either push on the knob or turn it to the end of it's range does the resistance between A and B change from infinite to 0 ohms? If so, you have confirmed that it is a switch.
The resistance between 1 and 3 should be fixed and between 1 & 2 (or between 2 & 3) vary as you turn the knob.
These are (were) commonly used as combined volume controls and on-off switches on radios before the digital age.
In response to the comment.
Since you measured an exponential change in resistance you have what is known as a logarithmic taper potentiometer. The other type is a linear taper. Logarithmic taper is used for volume controls since human hearing does not respond linearly but rather on a decibel scale.
If you measured across 1 & 2 instead of 2 & 3 you would have perhaps found the switch as "on" when the potentiometer is "on" as you put it. Looked at another way, the resistance across 1 & 2 will increases as the resistance across 2 & 3 decreases. In fact the resistance between 1 & 3 should remain constant as you turn the knob. Also for any place you put the knob, if you add up the resistance between 1 & 2 with the resistance between 2 & 3 that total should equal the resistance between 1 & 3.
Best Answer
I believe they are Tyco/Raychem TRF600-150, high-voltage resettable fuses, rated for 250VDC nominal (600VAC interrupt rating) and 150mA nominal.
I found a Tyco/Raychem datasheet that seems to match general part package and specs. Excerpt from page 10 (note the minimum resistance of 6Ω in the datasheet, which matches your measurement):
Raychem went defunct in 1999, and were acquired by Tyco, so maybe they are now available under that brand name. If you search Ebay for "Raychem 600 150", you'll find various listings for parts that look exactly like yours.
One example, from this listing, claiming to sell "RAYCHEM PTC Resettable Fuse Radial Leads .16A/.32A 250V 3A NEW 5/PKG":
The bottom row on these says
XS1G
rather than yourWN1U
. This is probably a production series code, which differs from batch to batch.Here is another listing, claiming to sell "( 25 PC. ) RAYCHEM/TYCO PTC TR600-150-2 RESETTABLE POLYSWITCH CIRCUIT PROTECTOR":