Parts · Transistors

2N3638A

Si PNP BJT.4 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
2N3638A	100	25 V	500 mA	0.3 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N4403	100	40 V	600 mA	0.31 W	200 MHz	11
PN2907	100	40 V	600 mA	0.4 W	200 MHz	5
TIS93	100	40 V	400 mA	0.625 W		4
2N4402	50	40 V	600 mA	0.31 W	150 MHz	4
BC327	63	45 V	800 mA	0.5 W	60 MHz	3
2N5401	60	150 V	600 mA	0.31 W	100 MHz	2
MPSA65	50	30 V	300 mA	0.625 W	100 MHz	2
PN200	40	35 V	500 mA	0.625 W	150 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BCW15	100	35 V	500 mA	0.3 W	150 MHz
BCW15K	100	35 V	500 mA	0.3 W	150 MHz
BCW15L	100	35 V	500 mA	0.3 W	150 MHz
BCW15M	100	35 V	500 mA	0.3 W	150 MHz
2N5373	100	30 V	500 mA	0.36 W	150 MHz
BC808A	100	25 V	500 mA	0.31 W	200 MHz
BCX18LT1G	100	25 V	500 mA	0.225 W	130 MHz
BFS40	100	35 V	500 mA	0.35 W	150 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Maestro RingMod 1458 · 1495 · 2N3566 · 2N3638A Maestro RingMod	Maestro RingMod	Ring Mod / Synth	Experimentalists Anonymous	—	3	—	42
Oberheim PS-1 1458 · 2N3638A · 2N4302 · ?	—	Phaser	Experimentalists Anonymous	—	1	—	27
Oberheim PS-1 (PDF) 1458 · 2N3638A · 2N4302 · ?	—	Phaser	Experimentalists Anonymous	—	—	—	27
Oberheim SEM-1A 2N3638A · 2N3905 · 2N4302 · 2N5172	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	373