Parts · Transistors

MPSA12

1 circuit uses this part.

Substitutes Si 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
MPSA12	20	20 V	300 mA	0.33 W	125 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N706A	20	15 V	200 mA	0.36 W	200 MHz	1
2N5845	25	40 V	1000 mA	0.625 W	300 MHz	1
2N708	30	15 V	200 mA	0.36 W	300 MHz	1
MPSA14	10	30 V	300 mA	0.31 W	125 MHz	4
2N3904	40	40 V	200 mA	0.31 W	300 MHz	282
2N2369	40	15 V	200 mA	0.36 W	500 MHz	3
MPSA05	50	60 V	500 mA	0.33 W	100 MHz	2
2N3903	50	40 V	200 mA	0.31 W	250 MHz	8

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BFS65	20	20 V	200 mA	0.4 W
BSYP62	20	15 V	200 mA	0.36 W
2N921	20	20 V	200 mA	0.36 W	200 MHz
2SC565	20	40 V	200 mA	0.35 W
2N783	20	20 V	200 mA	0.3 W	200 MHz
BSV23K	20	20 V	200 mA	0.3 W	200 MHz
BSV23L	20	20 V	200 mA	0.3 W	200 MHz
BSV23M	20	20 V	200 mA	0.3 W	200 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Lester Fuzz MPSA12	LSTR	Fuzz	Fuzz Dog	1590B	4	£36.00	38