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I have a laptop battery pack with a fried component (visually fried) that has the appearance of a large surface mount resistor (only 2 connectors). It has the PCB abbreviation next to it of "SR1" which I have not been able to identify. It also has "R010" and "FZ67" on it, though I haven't been able to find a component matching those part numbers either. One side of it connects directly to one end of the battery pack.

How do I identify this part?

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  • \$\begingroup\$ Can you post an image of the relevant PCB area? \$\endgroup\$
    – alexan_e
    Commented Dec 13, 2013 at 12:07
  • \$\begingroup\$ "SR" static relay ? \$\endgroup\$
    – Blup1980
    Commented Dec 13, 2013 at 12:13
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    \$\begingroup\$ The question would be easier to answer, if you add a photo of the component on the board. \$\endgroup\$
    – Nick Alexeev
    Commented Dec 13, 2013 at 16:41
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    \$\begingroup\$ @Markus, a picture, and possibly a schematic (self drawn) would help. R010 could refer to a 0.01Ω Resistor, as a "Series Resistor" or "Shunt Resistor" for voltage and current sensing. But most resistors only have one code, not two on them. So a picture is a must here. \$\endgroup\$
    – Passerby
    Commented Dec 13, 2013 at 16:54
  • \$\begingroup\$ Dear reader, please ignore the accepted answer and look at Dave Tweed's answer below. \$\endgroup\$
    – Elliot Alderson
    Commented Nov 23, 2019 at 14:38

2 Answers 2

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"SR" could an abbreviation of Silicon Rectifier. Its a 2 terminal component and could have the size of a smd resistor.

Its look like this:

enter image description here

Here are some examples of components: 1, 2, 3, 4

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  • \$\begingroup\$ Sorry for the late reply. Thanks to all for your responses and help (sorry I didn't know this forum was aimed mainly at design, so I'll keep than in mind for the future, I'll also remember diagrams and/or photos). I think Butzke has hit the nail on the head, that's exactly how it looks and suits its location in circuit. Thanks for a great and detailed answer. \$\endgroup\$
    – Markus
    Commented Dec 15, 2013 at 1:46
  • \$\begingroup\$ That being said, before getting a replacement, I'll draw the circuit to ensure it's not a resistor for voltage monitoring as previously suggested. Thanks again. \$\endgroup\$
    – Markus
    Commented Dec 15, 2013 at 1:53
  • \$\begingroup\$ @Markus If the answer was right please consider to mark as answered. \$\endgroup\$
    – Butzke
    Commented Dec 17, 2013 at 10:48
  • \$\begingroup\$ @Markus those packages are used for multiple types of devices. Diodes, Resistors, chip inductors, fuses, etc. \$\endgroup\$
    – Passerby
    Commented Dec 17, 2013 at 20:16
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    \$\begingroup\$ This is almost certainly wrong. There would be no reason to connect such a diode directly to one terminal of a battery pack. \$\endgroup\$
    – Dave Tweed
    Commented Nov 23, 2019 at 12:09
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Shunt resistor, 0.010 ohms, common on laptop battery PCB.

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    \$\begingroup\$ Agreed - the reported component marking "R010" fits with this answer. \$\endgroup\$
    – SamGibson ♦
    Commented Nov 23, 2019 at 11:21
  • \$\begingroup\$ ...and this is what happens when the OP decides which answer is "best"... \$\endgroup\$
    – Elliot Alderson
    Commented Nov 23, 2019 at 14:37

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