Parts · Transistors

MPS5172

Si NPN BJT TO-92 TH.2 circuits use 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
MPS5172	100	25 V	100 mA	0.2 W	200 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N4970	100	30 V	500 mA	0.2 W	200 MHz	1
2N2926	100	25 V	100 mA	0.2 W	100 MHz	3
IT122	100	45 V	50 mA	0.3 W	180 MHz	1
2N4401	100	40 V	600 mA	0.31 W	250 MHz	52
2SC381	90	20 V	100 mA	0.2 W	150 MHz	1
ZTX384	100	30 V	100 mA	0.45 W	150 MHz	1
2N2222	100	30 V	800 mA	0.5 W	250 MHz	129
2N2924	100	25 V	100 mA	0.36 W	100 MHz	3

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BSX81	100	30 V	100 mA	0.23 W	200 MHz
2SC454	100	30 V	100 mA	0.2 W	230 MHz
2SC458	100	30 V	100 mA	0.2 W	230 MHz
2SC458B	100	30 V	100 mA	0.2 W	230 MHz
BFV11	100	30 V	800 mA	0.15 W	200 MHz
BFV53	100	30 V	800 mA	0.15 W
2N4437	100	30 V	500 mA	0.2 W	250 MHz
2SC933	100	30 V	300 mA	0.2 W	250 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Oberheim SBX 2N3905 · 2N4302 · 3080 · 3086	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	88
	Oberheim XPander 2764 · 4053 · 6264 · 68B09	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	103