SMD Resistor markings

[Scarr]

Hi all,

I have two resistors, can anyone tell what tolerances they are, they have the markings

102
10B (that is a B not eight)

Or can you not determine it?

Thanks

Steve

 

[Reloadron]

If the first is a resistor it should be 1K as in One-Zero and two zeros. I am not sure about the second one.

Ron

 

[Scarr]

Pictures

I have attached some pictures to help with my question.

Thanks

Steve

 

[Dean Huster]

Three figures on an SMT resistor indicate the value -- first sig digit, second sig digit, power of 10 multiplier -- of a 5% device.
Four figures on an SMT resistor indicate the value -- first sig digit, second sig digit, third sig digit, power of 10 multiplier -- of a 1% device.

The letter "R" is a decimal point indicator for low values, e.g., 1R8 for 1.8 ohms, 49R9 for 49.9 ohms (1%).

However, I'm no SMT guru, so resistors with better than 1% tolerance? Don't know.
10B? Dunno, either. What does your ohmmeter say about this part? That's the first step in analyzing a part with an unknown value.

 

[shuiping56]

you can try hhe

 

[davenn]

and its NOT 10B its 01B not that it helps I havent seen a resistor marked as such
definately needs to be measured to find out

Dave

 

[Dean Huster]

Oops. Went by the text in the OP and didn't check the pics. Measure the thing with an ohmmeter and see if there's low resistance or an open. If open, I'd suspect a cap, value of 0.01µF. However, in most cases it would be marked as "104".

 

[Mr RB]

Low ohms resistor.

 

[Diver300]

01S

The 01B is 1kΩ

So is the one labelled 102

They use different marking schemes.

The tolerance isn't marked. You have to guess. However, 1% ones aren't expensive.

 

[davenn]

01S
The 01B is 1kΩ
So is the one labelled 102
They use different marking schemes.
The tolerance isn't marked. You have to guess. However, 1% ones aren't expensive.

Outstanding Diver !!
havent seen that list before, has now been saved to component data folder

cheers
Dave

 

[Mr RB]

Interesting! Thanks for the info.