Parts · Transistors

2N5173

Si NPN BJT.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
2N5173	80	45 V	25 mA	0.2 W

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2SC945	75	40 V	100 mA	0.25 W	125 MHz	10
2SC2458	70	50 V	150 mA	0.2 W	80 MHz	10
2N3416	75	50 V	500 mA	0.36 W		1
2SC2712	70	50 V	150 mA	0.15 W	80 MHz	1
2SC828A	65	45 V	50 mA	0.25 W	110 MHz	1
2SC1815	70	50 V	150 mA	0.4 W	80 MHz	85
2N5551	80	160 V	600 mA	0.31 W	100 MHz	6
IT122	100	45 V	50 mA	0.3 W	180 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N2972	80	45 V	30 mA	0.25 W	60 MHz
2N2976	80	45 V	30 mA	0.25 W	60 MHz
2SC815	80	45 V	200 mA	0.25 W	100 MHz
2SC944	80	40 V	100 mA	0.25 W	200 MHz
2N2910	80	45 V	40 mA	0.3 W	55 MHz
2SC2107	80	40 V	100 mA	0.15 W	150 MHz
2SC1632	82	50 V	200 mA	0.25 W	70 MHz
2SC1633	82	50 V	200 mA	0.25 W	70 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Sam Ash Fuzz-Stainer Perfboard Verified 2N5173 Sam Ash Fuzz-Stainer	Sam Ash Fuzz-Stainer	Fuzz	Effects Layouts (blog)	—	3	—	19
	Sam Ash Fuzz-Stainer Vero 2N5173 Sam Ash Fuzz-Stainer	Sam Ash Fuzz-Stainer	Fuzz	turretboard.org	—	3	—	19