Parts · Transistors

MPS3638

Si PNP BJT TO-92 TH.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
MPS3638	30	25 V	500 mA	0.625 W	100 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
PN200	40	35 V	500 mA	0.625 W	150 MHz	1
2N2907	35	40 V	600 mA	0.4 W	200 MHz	38
MPSA65	50	30 V	300 mA	0.625 W	100 MHz	2
MPSA64	20	30 V	500 mA	0.33 W	125 MHz	1
2N2904A	40	60 V	600 mA	0.6 W	200 MHz	1
2N2905	20	40 V	600 mA	0.6 W	200 MHz	2
MPSA92	25	300 V	500 mA	0.625 W	50 MHz	2
BC327	63	45 V	800 mA	0.5 W	60 MHz	3

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SA523	30	40 V	300 mA	0.65 W	100 MHz
MPS6535M	30	30 V	600 mA	0.625 W	130 MHz
2N2696CSM	30	25 V	500 mA	0.36 W	100 MHz
2N2800	30	35 V	800 mA	0.8 W	120 MHz
2SA523A	30	60 V	300 mA	0.65 W	100 MHz
BF323	30	25 V	600 mA	0.4 W	150 MHz
BFX74	30	35 V	600 mA	0.6 W	60 MHz
2N722	30	35 V	500 mA	0.4 W	80 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Transistor theremin MPS3638 · MPS3708 · TIS-59	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	55