Parts · Transistors

BC177

Si PNP BJT TO-18 TH.2 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
BC177	70	45 V	100 mA	0.3 W	130 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC307	75	45 V	100 mA	0.3 W	100 MHz	1
2SA1015	70	50 V	150 mA	0.4 W	80 MHz	8
BC557	75	45 V	200 mA	0.3 W	75 MHz	20
2SA1048	70	50 V	150 mA	0.2 W	80 MHz	6
BC556	75	65 V	100 mA	0.5 W	150 MHz	1
BC327	63	45 V	800 mA	0.5 W	60 MHz	3
2N4121	70	40 V	100 mA	0.2 W	450 MHz	1
2N4402	50	40 V	600 mA	0.31 W	150 MHz	4

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC157	70	45 V	100 mA	0.3 W	130 MHz
BC257	70	45 V	100 mA	0.3 W	130 MHz
2SA1623	65	45 V	100 mA	0.3 W
2SA718	70	40 V	200 mA	0.3 W	100 MHz
2SA1620	70	60 V	200 mA	0.3 W	150 MHz
2SA1618	70	40 V	150 mA	0.25 W	150 MHz
BSW44A	75	50 V	200 mA	0.3 W
BSW44AK	75	50 V	200 mA	0.3 W

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Seymour Duncan Pickup Booster Perfboard Unverified BC107 · BC177 Seymour Duncan Pickup Booster · 1590A	Seymour Duncan Pickup Booster	Boost	Effects Layouts (blog)	1590A	1	—	16
	Seymour Duncan Pickup Booster Vero15×11 Verified BC107 · BC177 Seymour Duncan Pickup Booster	Seymour Duncan Pickup Booster	Boost	Tagboard Effects	—	1	—	15