Parts · Transistors

BC557B

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
BC557B	200	45 V	100 mA	0.5 W	75 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC560B	240	45 V	100 mA	0.5 W	150 MHz	1
BC307B	240	45 V	100 mA	0.3 W	130 MHz	3
2N3965	250	60 V	200 mA	0.36 W	50 MHz	3
2N5087	250	50 V	50 mA	0.31 W	40 MHz	73
2SA1015Y	120	50 V	150 mA	0.4 W	80 MHz	2
BC560	110	45 V	100 mA	0.5 W	150 MHz	1
BC560C	420	45 V	100 mA	0.5 W	150 MHz	1
PN2907	100	40 V	600 mA	0.4 W	200 MHz	4

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SA2195	200	50 V	1700 mA	0.5 W
2SA2056	200	50 V	2000 mA	0.625 W
BC405	200	50 V	150 mA	0.35 W	75 MHz
2SA1054	200	60 V	600 mA	0.6 W
2N3550	200	45 V	100 mA	0.4 W	60 MHz
BCM62B	200	45 V	100 mA	0.39 W	100 MHz
2SA2060	200	50 V	2000 mA	1 W
2SA2070	200	50 V	1000 mA	1 W

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	General Tso’s Compressor BC549C · BC557B · J113 · OPA2134	ThorpyFX Fat General	Compressor	PedalPCB	125B	4	$12.00	63