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resistor from a stepper motor driver of 6A 20-50vDC

I tried checking with 5 band color code but was unsuccessful. Resistor is blown hence the value cannot be determined using multimeter.

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  • \$\begingroup\$ Are you sure it is blown? It could be an inductor. In any case, you can't usually measure resistors in circuit. \$\endgroup\$ – JRE Feb 13 at 6:32
  • \$\begingroup\$ @JRE the one i shared is the working one yes the resistor is blown and i cannot measure the value and have no working drivers \$\endgroup\$ – Amrith Feb 13 at 6:53
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    \$\begingroup\$ Although you managed to hide the component designator, it does look like it says Rxx, but it would be nicer if you could clarify that. It looks more like a fuse. \$\endgroup\$ – pipe Feb 13 at 8:58
  • \$\begingroup\$ @pipe it is R25 \$\endgroup\$ – Amrith Feb 25 at 11:25
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It is a fusible metal film resistor which has value of 5.8 ohms with +/- 0.5% tolerance.Reference

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  • \$\begingroup\$ The third band is grey! \$\endgroup\$ – user183710 Feb 13 at 15:26
  • \$\begingroup\$ why is there a huge gap between 3rd band and 4th band? thanks for the reference \$\endgroup\$ – Amrith Feb 25 at 11:29
  • \$\begingroup\$ It's probably just another way of color coding.. \$\endgroup\$ – user183710 Feb 25 at 13:42
  • \$\begingroup\$ If my answer works for you please accept it by clicking on the tick mark \$\endgroup\$ – user183710 Feb 25 at 13:43
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I don't know if third band is white or gray. 5.8 ohm ±0.5% tolerance.

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  • \$\begingroup\$ for white : 5.9 ohm +- 0.5 tolerance. \$\endgroup\$ – mohamad--figo Feb 13 at 6:30
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    \$\begingroup\$ Third band looks silver to me. \$\endgroup\$ – JRE Feb 13 at 6:33
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    \$\begingroup\$ silver and gold can be used as multiplier only! \$\endgroup\$ – mohamad--figo Feb 13 at 6:36
  • \$\begingroup\$ Third band looks silver to me i have calculated the same 5ohms value but i am not certain \$\endgroup\$ – Amrith Feb 13 at 6:46
  • \$\begingroup\$ yes third band looks silver the band color coding is confusing my best guess is 5ohms 2w resistor but maybe someone who has more knowledge can help \$\endgroup\$ – Amrith Feb 13 at 6:52
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This circuit looks somewhat familiar, and I believe it is both a resistor and a fuse, the thin metal at higher voltage will 'blow' the resistor but at lower voltage regulates the current, so a surge current (or rouge failure of the power circuit) won't kill the rest of the components.

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  • \$\begingroup\$ I'm confused can you add more information? \$\endgroup\$ – Amrith Feb 25 at 13:09

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