Test with a multimeter

PNP BJT (BC557)

Explore in Atlas

Now: Emitter → base (red on E, black on B)

CircuVanta 6000 counts · auto range DCAUTO•)))HOLDFUSE− HOLD LIGHT OFFV⎓V~Ω•)))FmA⎓ mA400 mACOMVΩ Collector (C) 1 C Base (B) 2 B Emitter (E) 3 E
Pin 1: Collector (C) (C) Pin 2: Base (B) (B) Pin 3: Emitter (E) (E)

Red probe Not connectedBlack probe Not connected

Hold the probe and drag it to the tip of a leg. Tapping works too: first pick the probe, then the leg.

Set the range to diode test.

Measure step by step

On a PNP transistor the diodes point the other way: black probe on the base, red probe on the emitter and on the collector, and it conducts. Collector to emitter should read OL in both directions.

  1. 1Emitter → base (red on E, black on B)
  2. 2Collector → base (red on C, black on B)
  3. 3Base → emitter (reverse)
  4. 4Base → collector (reverse)
  5. 5Collector → emitter
  6. 6Emitter → collector