Parts · Transistors

MPQ3904

Si NPN BJT.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
MPQ3904	50	40 V	200 mA	0.31 W	250 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N3903	50	40 V	200 mA	0.31 W	250 MHz	15
2N4123	50	30 V	200 mA	0.31 W	240 MHz	2
MPSA05	50	60 V	500 mA	0.33 W	100 MHz	6
2SC1175	40	45 V	200 mA	0.3 W	170 MHz	1
2N3053	50	40 V	700 mA	1 W	100 MHz	4
PN100	40	35 V	500 mA	0.625 W	200 MHz	5
MPSA06	50	80 V	500 mA	0.625 W	100 MHz	6
2N3416	75	50 V	500 mA	0.36 W		1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
PN3905	50	40 V	200 mA	0.31 W	250 MHz
BSS66R	50	40 V	100 mA	0.3 W	250 MHz
2N6503	50	40 V	1000 mA	0.35 W	250 MHz
BSR17R	50	40 V	200 mA	0.35 W	250 MHz
2N5380	50	40 V	200 mA	0.36 W	250 MHz
BCY70P	50	40 V	200 mA	0.4 W	250 MHz
2SC3915	50	50 V	500 mA	0.3 W	250 MHz
2SC4120	50	50 V	100 mA	0.3 W	250 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Gerkin Fuzz MPQ3904 Way Huge Swollen Pickle · 125B	Way Huge Swollen Pickle	Fuzz	PedalPCB	125B	7	$12.00	62