Parts · Transistors

BC149

Si NPN BJT.6 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
BC149	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

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Satronik Fuzz Sustainer Vero21×18 Verified 741 · BC108C · BC149 · LM741 Satronik Fuzz Sustainer	Satronik Fuzz Sustainer	Distortion	Dirtbox Layouts	—	3	—	32
Tesla AYZ-030 Graphic Equalizer Vero22×19 Unverified 741 · BC149 · LM741 Tesla AYZ-030 Graphic Equalizer	Tesla AYZ-030 Graphic Equalizer	EQ / Filter	Dirtbox Layouts	—	2	—	36
Montarbo Sinfhoton Perfboard Verified BC149 Montarbo Sinfhoton	Montarbo Sinfhoton	Fuzz	Effects Layouts (blog)	—	3	—	21
Montarbo Sinfhoton Vero12×13 Verified BC149 Montarbo Sinfhoton	Montarbo Sinfhoton	Fuzz	Tagboard Effects	—	3	—	17
Montarbo Sinfhoton Vero16×13 Verified BC149 Montarbo Sinfhoton	Montarbo Sinfhoton	Fuzz	Tagboard Effects	—	—	—	18
Montarbo Sinfhoton Highly Modified Vero13×14 Verified BC149 Montarbo Sinfhoton Highly Modified	Montarbo Sinfhoton Highly Modified	Fuzz	Tagboard Effects	—	4	—	19