Parts · Transistors

BC239

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
BC239	200	20 V	100 mA	0.3 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC109B	200	20 V	100 mA	0.3 W	150 MHz	1
BC109	180	20 V	100 mA	0.3 W	150 MHz	20
BC107B	200	45 V	100 mA	0.3 W	150 MHz	4
BC549B	200	30 V	100 mA	0.5 W	200 MHz	8
BC548B	200	30 V	100 mA	0.5 W	200 MHz	4
BC550B	200	45 V	100 mA	0.5 W	150 MHz	2
BC184	240	30 V	200 mA	0.3 W	150 MHz	4
BC183B	240	30 V	200 mA	0.3 W	150 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC108B	200	20 V	100 mA	0.3 W	150 MHz
BC238B	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
BC149	200	20 V	200 mA	0.25 W	150 MHz
BC149B	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

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	May Boost BC239	Fryer Treble Boost	Boost	On The Road Effects	1590B	1	$8.00	18