Parts · Transistors

BC309

Si PNP BJT TO-92 TH.3 circuits use this part.

Substitutes Si PNP 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
BC309	125	20 V	100 mA	0.3 W	100 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC559	125	25 V	200 mA	0.3 W	75 MHz	4
2SA666	120	25 V	50 mA	0.25 W	70 MHz	3
BC557A	125	45 V	100 mA	0.5 W	75 MHz	2
2SA1015Y	120	50 V	150 mA	0.4 W	80 MHz	4
2N4126	120	25 V	200 mA	0.31 W	250 MHz	5
MPS6519	150	25 V	100 mA	0.31 W	200 MHz	1
BC178B	180	25 V	200 mA	0.3 W	100 MHz	1
BC187	100	25 V	100 mA	0.3 W	50 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC205A	125	20 V	100 mA	0.3 W	100 MHz
BC206	125	20 V	100 mA	0.3 W	100 MHz
BC206A	125	20 V	100 mA	0.3 W	100 MHz
BC262	125	25 V	100 mA	0.3 W	100 MHz
BC262A	125	25 V	100 mA	0.3 W	100 MHz
BC263	125	25 V	100 mA	0.3 W	100 MHz
BC263A	125	25 V	100 mA	0.3 W	100 MHz
BC308A	125	25 V	100 mA	0.3 W	100 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Electro Harmonix Attack Equalizer / Knockout EQ Vero25×23 Unverified 4558 · 7660S · BC309 · ICL7660S Electro-Harmonix Knockout Attack Equalizer	Electro-Harmonix Knockout Attack Equalizer	EQ / Filter	Dirtbox Layouts	—	3	—	33
Electro Harmonix Black Finger Compressor/Sustainer Vero22×23 Unverified 741 · 7660S · BC239 · BC309 Electro-Harmonix Black Finger Compressor/Sustainer	Electro-Harmonix Black Finger Compressor/Sustainer	Compressor	Tagboard Effects	—	3	—	37
Electro Harmonix Knockout Attack Equalizer Vero22×24 Verified 4558 · 7660S · BC309 Electro-Harmonix Knockout Attack Equalizer	Electro-Harmonix Knockout Attack Equalizer	EQ / Filter	Tagboard Effects	—	3	—	30