Parts · Transistors

BC149B

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
BC149B	200	20 V	200 mA	0.25 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC108B	200	20 V	100 mA	0.3 W	150 MHz	20
BC109B	200	20 V	100 mA	0.3 W	150 MHz	13
BC239	200	20 V	100 mA	0.3 W	150 MHz	7
BC238B	200	20 V	100 mA	0.3 W	150 MHz	2
BC239B	200	20 V	100 mA	0.3 W	150 MHz	1
BC349B	200	20 V	100 mA	0.3 W	125 MHz	1
BC849	200	30 V	100 mA	0.2 W	150 MHz	2
BC319	200	20 V	150 mA	0.31 W	100 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC148B	200	20 V	200 mA	0.25 W	150 MHz
BC408B	200	20 V	100 mA	0.25 W	150 MHz
BC409	200	20 V	100 mA	0.25 W	150 MHz
BC409B	200	20 V	100 mA	0.25 W	150 MHz
BCF29B	200	20 V	200 mA	0.25 W	165 MHz
BCF92	200	20 V	200 mA	0.25 W	165 MHz
BC239A	200	20 V	100 mA	0.3 W	150 MHz
BCY57	200	20 V	200 mA	0.3 W	150 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Montarbo Sinfhoton Perfboard BC149B Montarbo Sinfhoton	Montarbo Sinfhoton	Fuzz	turretboard.org	—	—	—	13