[SOLVED] Recommended Schematic Symbol for Chip Resistor with Centre Stripe

[ivan27807]

Hi,

Can anybody recommend a proper schematic symbol for a smd ship resistor with central stripe (an extra pad on the centre for connection to copper in pcb as heatsink). I created an Altium schematic symbol for it but some of you may have a better idea how the schematic symbol should be. Please see image "Schematic symbol.jpg" for the schematic symbol I created.

I have also attached a datasheet image of what a smd with cs package looks like, please refer "Chip resistor with CS.jpg".

Thank you in advance.

 

[Mattylad]

If there is no electrical connectivity to the centre then why bother? just have it the same.

If you make something up then your just going to confuse people until they know what it is.

 

[Prototyp_V1.0]

Suggestion for simple symbol:

 

[marce]

The symbol you show looks to much like a variable resistor, move the third pad away from resistor...
IPC-2612 and IPC-2612-1 are a good reference.

 

[ivan27807]

Hi Mattylad,

Your point makes sense. CS pad does not really have electrical connection, its just there for heat sinking purposes. Thanks!

Hi Marce,

I will check that doc. Thanks a lot for pointing me to an ipc reference.

 

[marce]

You may have to tie the heat sinking pad to GND for EMC purposes... have u a link to the data sheet for the device.