Parts · Transistors

BC238/239

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
BC238	110	20 V	100 mA	0.3 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC108	120	20 V	100 mA	0.3 W	150 MHz	17
BC107	110	45 V	100 mA	0.3 W	150 MHz	4
BC183A	120	30 V	200 mA	0.3 W	150 MHz	2
BC183	120	30 V	200 mA	0.3 W	150 MHz	1
BC549	110	30 V	100 mA	0.5 W	200 MHz	6
BC182	120	50 V	200 mA	0.3 W	150 MHz	1
2N6076	100	25 V	100 mA	0.36 W	100 MHz	1
2N2924	100	25 V	100 mA	0.36 W	100 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BCAP38	110	20 V	100 mA	0.3 W	150 MHz
BC148	110	20 V	200 mA	0.25 W	150 MHz
BC148A	110	20 V	200 mA	0.25 W	150 MHz
BC408	110	20 V	100 mA	0.25 W	150 MHz
BC408A	110	20 V	100 mA	0.25 W	150 MHz
BC268A	110	20 V	1000 mA	0.375 W	150 MHz
BC349A	110	20 V	100 mA	0.3 W	125 MHz
BCW48	110	20 V	100 mA	0.2 W	150 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Treble Deluxe BC238/239	Treble Deluxe	Boost	Fuzz Dog	1590A	—	£19.20	15