Parts · Transistors

2SB642R

Si PNP BJT.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
2SB642	160	50 V	100 mA	0.4 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC560	110	45 V	100 mA	0.5 W	150 MHz	8
2SA1015Y	120	50 V	150 mA	0.4 W	80 MHz	4
BC557B	200	45 V	100 mA	0.5 W	75 MHz	6
BC560B	240	45 V	100 mA	0.5 W	150 MHz	4
BC557A	125	45 V	100 mA	0.5 W	75 MHz	2
2SA493	200	40 V	50 mA	0.2 W	100 MHz	3
2SA1048GR	200	50 V	150 mA	0.2 W	80 MHz	2
BC307B	240	45 V	100 mA	0.3 W	130 MHz	6

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC291B	150	45 V	200 mA	0.36 W
BC292B	150	45 V	200 mA	0.36 W
2SA709	160	40 V	200 mA	0.3 W	140 MHz
2SA883	160	40 V	200 mA	0.3 W	140 MHz
2N2593	160	60 V	50 mA	0.4 W	110 MHz
2SA608N	160	50 V	150 mA	0.5 W	200 MHz
2N6225	150	60 V	100 mA	0.36 W
2SA844	160	55 V	100 mA	0.3 W	200 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	BOSS DR-100 2SA1115F · 2SB642R · 2SC2603F · 2SC945K Boss DR-100	Boss DR-100	Ring Mod / Synth	Experimentalists Anonymous	—	4	—	289
	BOSS DR-110 2SA1115F · 2SB642R · 2SC2603F · 2SC945K Boss DR-110	Boss DR-110	Ring Mod / Synth	Experimentalists Anonymous	—	4	—	288