Transistor NPN 100V 5A TO-220

#TIP122

Darlington NPN 100V 5A 3-Pin (3+Tab) TO-220AB transistor in TO-220 package.


To see if your transistor is bad, use a digital multimeter set to the diode check mode.

  • (-) = negative/black test lead
  • (+) = positive/red test lead.
  • Pin 1 = the pin with a dot above it.


For TIP122s, these are typical voltage drop values when measured with a typical multimeter in diode test mode.

When replacing TIP122 transistors, verify that the diode on the coil in question is not shorted, or the replacement will fail.

FromToValue
1 (-)2 (+)open
1 (-)3 (+)1.84
Pin 2 (-)Pin 3 (+) 0.55 V
Pin 1 (+)Pin 2 (-)0.63 V
Pin 1 (+)Pin 3 (-)0.75V
Pin 2 (+)Pin 1 (-)open
Pin 2 (+)Pin 3 (-)open


Reference:

  • 5162-09410-00
  • Data East / Sega / Stern 110-0067-00
  • Wico 21-309400
  • TIP102 is excellent substitute

0.063 oz

$1.49

In Stock
Bulk Order Discount
Qty 10+
Price $0.70