Parts · Transistors

BC238

Si NPN BJT TO-92 TH.3 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
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	56
BC108A	120	20 V	100 mA	0.3 W	150 MHz	3
S8050	120	25 V	500 mA	0.3 W	150 MHz	1
BC107	110	45 V	100 mA	0.3 W	150 MHz	13
BC107A	110	45 V	100 mA	0.3 W	150 MHz	3
BC237	110	45 V	100 mA	0.3 W	150 MHz	1
BC183	120	30 V	200 mA	0.3 W	150 MHz	7
BC183A	120	30 V	200 mA	0.3 W	150 MHz	3

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

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
EMMA ReezaFRATzitz Perfboard Verified 4069N · BC238 · CD4069UB EMMA ReezaFRATzitz · 1590B	EMMA ReezaFRATzitz	Distortion	Effects Layouts (blog)	1590B	6	—	26
Treble Deluxe BC238/239 Greg Fryer Treble Booster Deluxe · 1590A	Greg Fryer Treble Booster Deluxe	Boost	Fuzz Dog	1590A	—	£19.20	15
EMMA ReezaFRATzitz RF-1 BC238 · CD4069 · CD4069UB EMMA ReezaFRATzitz	EMMA ReezaFRATzitz	Distortion	Revolution Deux	—	4	—	64