Parts · Transistors

AC187

1 circuit uses this part.

Substitutes Ge NPN transistor

Matched on material, polarity and the limits below from the transistor parameter database. Pinouts and packages are not in that data: check the datasheet before you drop one in, and expect gain to change the sound.

This part

Part	hFE min	Vce	Ic	Pc	fT
AC187	100	15 V	2000 mA	0.225 W	1 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2SD352	100	30 V	1000 mA	0.6 W		2
AC176	52	20 V	1000 mA	0.22 W	1 MHz	7

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
AC194	90	15 V	1000 mA	1 W	1 MHz
NKT782	165	12 V	1000 mA	0.3 W	0.5 MHz
NKT781	52	20 V	1000 mA	0.215 W	0.5 MHz
AC181	50	16 V	1000 mA	0.3 W	2 MHz
AC558	40	16 V	1000 mA	0.23 W	1 MHz
AC175	60	16 V	1000 mA	1.1 W	0.5 MHz
AC141	40	18 V	1200 mA	0.72 W	1 MHz
2N1000	40	25 V		0.15 W	6 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Kinetic Fuzz AC187 · TL072	Keeley Psi Fuzz	Fuzz	PedalPCB	125B	3	$8.00	43