Determine the component of "SB1" in STM32F407G-DISC1

[rohithinthingstech]

Could someone help identify the part number and range for the SB1 component on the STM32F407G-DISC1 board? I'm interested in understanding its exact specifications.

[PGump.1]

Hi,

SB1 is a Solder Bridge. You can find the specifications from:

https://en.wikipedia.org/wiki/Solder 

I hope that helps.

Kind regards
Pedro

[rohithinthingstech]

Is it necessary to keep solder bridge in custorm board ?

[PGump.1]

Only you can decide that...

Kind regards
Pedro

[Andrew Neil]

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@rohithinthingstech wrote:

Could someone help identify the part number and range for the SB1 component on the STM32F407G-DISC1 board? I'm interested in understanding its exact specifications.

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As already noted, "SB" is a Solder Bridge:

Just like a Jumper ("JP") it allows a connection to be easily made (closed) or broken (opened) - to allow configuration to a user's requirements.

https://electronics.stackexchange.com/questions/261106/solder-bridge-in-schematics-and-0-resistors

They use these Solder Bridges rather than traditional Jumper links because:

• They are cheaper
• They are smaller
• They are easier for board assembly.

In some cases, rather than just use a "blob" of solder, a zero-ohm resistor (aka "zero-ohm link") will be fitted:

https://en.wikipedia.org/wiki/Zero-ohm_link

Here's an example - where SB53 (at the top) is "closed" with a zero-ohm link, and the others are "open":

 

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Note that, in some cases, the pads of a Solder Bridge may have a track connecting them; eg,

https://www.reddit.com/r/KiCad/comments/p2bg9y/solder_jumper_usage_conceptual_question/

To "break" this kind of bridge, you need to cut that track.

I don't think that ST use this type - but other manufacturers certainly do

 

#SolderBridge #SB 

[AlexWEI]

hi, you can refer the SBx as 0 ohm Res on board for cutting or connecting lines .