Parts · Transistors

MPS3904

Si NPN BJT TO-92 TH.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
MPS3904	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
	Amplified White Noise Generator 741 · LM386 · MPS3904	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	14