Parts · Transistors

BC558

1 circuit uses 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
BC558	75	25 V	100 mA	0.5 W	75 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	1
PN2907	100	40 V	600 mA	0.4 W	200 MHz	4
2SA1015Y	120	50 V	150 mA	0.4 W	80 MHz	2
BC560	110	45 V	100 mA	0.5 W	150 MHz	1
2N5401	60	150 V	600 mA	0.31 W	100 MHz	1
2N4403	100	40 V	600 mA	0.31 W	200 MHz	4
2N3906	100	40 V	200 mA	0.31 W	250 MHz	113
2N4125	50	30 V	200 mA	0.31 W	200 MHz	7

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BFW31	70	30 V	700 mA	0.5 W
KSA642	70	25 V	300 mA	0.4 W
BC298	75	25 V	1000 mA	0.375 W	100 MHz
BC418	75	25 V	100 mA	0.25 W	75 MHz
PN750	75	40 V	2000 mA	0.625 W	75 MHz
MPSA66	75	30 V	300 mA	0.625 W	100 MHz
2SA509	70	30 V	500 mA	0.6 W	70 MHz
2SA509O	70	30 V	500 mA	0.6 W	70 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Fillmore Fuzz BC558 · MPSA18	Band of Gypsys Fuzz Face	Fuzz	Fuzz Dog	1590B	2	£30.00	31