Parts · Transistors

2N3904/2N5088

2 circuits use 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
2N3904	40	40 V	200 mA	0.31 W	300 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	8
MPSA05	50	60 V	500 mA	0.33 W	100 MHz	2
2N5845	25	40 V	1000 mA	0.625 W	300 MHz	1
2N3053	50	40 V	700 mA	1 W	100 MHz	1
MPSA06	50	80 V	500 mA	0.625 W	100 MHz	2
BC639	40	80 V	1000 mA	1 W	50 MHz	1
2SC536	60	30 V	100 mA	0.2 W	115 MHz	1
2SC1815	70	50 V	150 mA	0.4 W	80 MHz	28

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BFJ67	40	40 V	1000 mA	0.36 W
BFJ68	40	40 V	1000 mA	0.36 W
BSS79B	40	40 V	800 mA	0.35 W	250 MHz
BFV85A	40	40 V	800 mA	0.36 W	250 MHz
BFW68	40	40 V	200 mA	0.36 W	250 MHz
2SC945R	40	50 V	150 mA	0.25 W	300 MHz
KSC945	40	50 V	150 mA	0.25 W	300 MHz
BSS81B	40	35 V	800 mA	0.35 W	250 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	HF Modulator 2N3904/2N5088	Jen HF Modulator	Tremolo	Fuzz Dog	1590B	3	£27.60	33
	SD-9 Sonic Distortion 2N3904/2N5088 · 4558	SD-9	Distortion	Fuzz Dog	1590B	3	£31.20	38