Parts · Transistors

BC238B

Si NPN BJT TO-92 TH.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
BC238B	200	20 V	100 mA	0.3 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
BC239B	200	20 V	100 mA	0.3 W	150 MHz	1
BC149	200	20 V	200 mA	0.25 W	150 MHz	6
BC149B	200	20 V	200 mA	0.25 W	150 MHz	1
BC349B	200	20 V	100 mA	0.3 W	125 MHz	1
BC319	200	20 V	150 mA	0.31 W	100 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC239A	200	20 V	100 mA	0.3 W	150 MHz
BCY57	200	20 V	200 mA	0.3 W	150 MHz
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

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	JSH Fuzz BC238B · BC239C	—	Fuzz	Experimentalists Anonymous	—	—	—	16
	Jen Fuzz Vero16×10 Verified BC238B Jen Fuzz	Jen Fuzz	Fuzz	Tagboard Effects	—	2	—	15