Parts · Transistors

MPS3708

Si NPN BJT TO-92 TH.1 circuit uses this part.

Substitutes Si NPN 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
MPS3708	45	30 V	30 mA	0.625 W	100 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N3053	50	40 V	700 mA	1 W	100 MHz	4
MPSA06	50	80 V	500 mA	0.625 W	100 MHz	6
2N1613	40	50 V	600 mA	0.8 W	80 MHz	3
PN100	40	35 V	500 mA	0.625 W	200 MHz	5
MPSA05	50	60 V	500 mA	0.33 W	100 MHz	6
2N697	40	40 V	500 mA	0.6 W	50 MHz	1
2N2396	40	40 V	300 mA	0.45 W	40 MHz	1
2SC1815	70	50 V	150 mA	0.4 W	80 MHz	85

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
PN3709	45	30 V	30 mA	0.625 W	100 MHz
2SC1908	45	30 V	30 mA	0.5 W	100 MHz
2N5810	45	25 V	750 mA	0.5 W	100 MHz
BCY42P	45	25 V	200 mA	0.45 W	100 MHz
PN4123	50	30 V	200 mA	0.625 W	100 MHz
2SC30	45	30 V	80 mA	0.5 W	140 MHz
BFY17	40	30 V	120 mA	0.6 W	100 MHz
BSX71	50	30 V	500 mA	0.5 W	100 MHz

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