Parts · Transistors

2N3638

Si PNP BJT.3 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
2N3638	30	25 V	500 mA	0.3 W	100 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2SA733	40	40 V	300 mA	0.25 W	90 MHz	6
2N2907	35	40 V	600 mA	0.4 W	200 MHz	38
MPSA64	20	30 V	500 mA	0.33 W	125 MHz	1
PN200	40	35 V	500 mA	0.625 W	150 MHz	1
MPSA65	50	30 V	300 mA	0.625 W	100 MHz	2
2N4402	50	40 V	600 mA	0.31 W	150 MHz	4
2N2904A	40	60 V	600 mA	0.6 W	200 MHz	1
2N2905	20	40 V	600 mA	0.6 W	200 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N2695	30	25 V	500 mA	0.3 W	100 MHz
2N2696	30	25 V	500 mA	0.3 W	100 MHz
2N5040	30	25 V	1000 mA	0.3 W	100 MHz
PN5142	30	20 V	500 mA	0.3 W	100 MHz
PN5143	30	20 V	500 mA	0.3 W	100 MHz
BC126A	30	40 V	600 mA	0.3 W	100 MHz
MPS6535	30	30 V	600 mA	0.31 W	130 MHz
BF323	30	25 V	600 mA	0.4 W	150 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
AR-317 VCO 2N3393 · 2N3638 · CA3080 · CA3080A	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	130
AR-318 Sample And Hold and Noise Generator 2N3393 · 2N3638 · 2N4870 · 2N5172	—	Ring Mod / Synth	Experimentalists Anonymous	—	2	—	132
AR-324 Lag and LFO 2N3393 · 2N3638 · 3347-1 · CA3080	—	Ring Mod / Synth	Experimentalists Anonymous	—	3	—	71