Transistor NPN 100V 5A TO-220

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

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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.

From	To	Value
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