Parts · Transistors

2N2905

Si PNP BJT TO-39 TH.2 circuits use this part.

Substitutes Si 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
2N2905	20	40 V	600 mA	0.6 W	200 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
MPSA64	20	30 V	500 mA	0.33 W	125 MHz	1
2N2907	35	40 V	600 mA	0.4 W	200 MHz	38
2N2904A	40	60 V	600 mA	0.6 W	200 MHz	1
PN200	40	35 V	500 mA	0.625 W	150 MHz	1
MPSA92	25	300 V	500 mA	0.625 W	50 MHz	2
2N4402	50	40 V	600 mA	0.31 W	150 MHz	4
MPSA65	50	30 V	300 mA	0.625 W	100 MHz	2
BC327	63	45 V	800 mA	0.5 W	60 MHz	3

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC397	20	50 V	1000 mA	0.8 W
2N5146	20	40 V	1500 mA	0.6 W	125 MHz
2N3765	20	60 V	1500 mA	0.5 W	150 MHz
2N3763	20	60 V	1500 mA	1 W	150 MHz
MPSA63	20	30 V	500 mA	0.33 W	125 MHz
2N5821	20	60 V	750 mA	0.5 W	100 MHz
BC143	20	60 V	1000 mA	0.8 W	100 MHz
BC287	20	60 V	1000 mA	0.8 W	100 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	BJFE Folk Fuzz 3.5% Perfboard Verified 2N2222A · 2N2905 BJFE Folk Fuzz 3.5% · 1590B	BJFE Folk Fuzz 3.5%	Fuzz	Effects Layouts (blog)	1590B	3	—	19
	BJFE Folk Fuzz 3.5% Vero14×11 Verified 2N2222A · 2N2905 BJFE Folk Fuzz 3.5%	BJFE Folk Fuzz 3.5%	Fuzz	Tagboard Effects	—	3	—	17