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I have this component salvaged. I think it's very generic, but I cannot find it.

Properties:

  • Dimensions: SMT 1206 length size, although the width is wider
  • Logo: General Semi (now Vishay I think)
  • Texts: Line 1: LP, Line 2: 3C
  • One connection at each end
  • PCB: Unknown

I would like to know what this is, as I cannot find any datasheet or identification.

enter image description here

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    \$\begingroup\$ The prominent bar on one end suggests teh cathode end of a diode. This page s-manuals.com/smd/lp suggests there are TVS diodes marked "LP", one of them by Vishay. Take a look at the datasheet there and see if it might eb a match (DO-214 etc) \$\endgroup\$
    – user16324
    Commented May 18, 2020 at 19:21
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    \$\begingroup\$ Take a high value resistance, like 100k, in series with it. Apply 0-32vDC and measure voltage across the device. It will likely stop at some voltage, the clamping voltage. \$\endgroup\$
    – rdtsc
    Commented May 18, 2020 at 19:32
  • \$\begingroup\$ @BrianDrummond DO-214 seems SMB, and mine is more like SMA, but your datasheet is closer than what I could find. \$\endgroup\$ Commented May 18, 2020 at 19:34
  • \$\begingroup\$ @rdtsc ... I will do (my power supply can only go until 30 V). ... Update: I will do, but not now, as I need to solder it to something (I have only two hands I cannot create that 'circuit' including holding the multimeter etc. \$\endgroup\$ Commented May 18, 2020 at 19:35
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    \$\begingroup\$ Note do not test tantalum capacitors this way. Doing so could destroy them. We're sure this is a TVS though. \$\endgroup\$
    – rdtsc
    Commented May 18, 2020 at 19:46

1 Answer 1

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According to this, 3C would be the date code. LP is the type code.

enter image description here

According to this, LP is an SMBJ16A unidirectional Tranzorb TVS rated for 16 volts.

enter image description here

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  • \$\begingroup\$ Thanks ... it seemed too small for SMB (but I don't have any reference). 16V could be useful too. \$\endgroup\$ Commented May 18, 2020 at 21:34

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