Parts · Transistors

MP41A

Ge PNP BJT TH.2 circuits use this part.

Substitutes Ge PNP 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
MP41A	50	30 V	150 mA	0.15 W	1 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N1382	50	25 V	200 mA	0.25 W	1 MHz	1
2G374	60	25 V	100 mA	0.15 W	1 MHz	1
2N526	65	30 V	500 mA	0.225 W	1 MHz	1
GT402B	60	25 V	500 mA	0.6 W	1 MHz	2
2SB56	80	25 V	150 mA	0.15 W	0.5 MHz	1
2N527	80	30 V	500 mA	0.225 W	2 MHz	2
ASY33	90	30 V	300 mA	0.15 W	0.5 MHz	1
AC151	30	24 V	200 mA	0.9 W	1 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
AC551	50	32 V	200 mA	0.22 W	1 MHz
AC555	50	32 V	500 mA	0.22 W	1 MHz
AC173	50	24 V	300 mA	0.2 W	1 MHz
ACY52	50	24 V	200 mA	0.22 W	1 MHz
ACY17	50	32 V	500 mA	0.26 W	1 MHz
2N201	50	32 V	100 mA	0.1 W	1.2 MHz
ACY39	50	40 V	500 mA	0.26 W	1 MHz
AC251	45	32 V	250 mA	0.125 W	1 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Ltava Fuzz Wah - modified Vero25×24 Unverified GT310B · KP103K · KT315A · MAX1044 Ltava Fuzz Wah	Ltava Fuzz Wah	Fuzz	Dirtbox Layouts	—	5	—	47
	Slava Ukraine GT310B · KP103G · KP103L · KT315A Ltava Fuzz Wah · 1590DD	Ltava Fuzz Wah	Tremolo	PCB Guitar Mania	1590DD	8	€1.00 out	127