Parts · Transistors

KT312

Si NPN BJT.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
KT312A	10		30 mA	0.225 W	80 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
MPSA14	10	30 V	300 mA	0.31 W	125 MHz	29
SC206	16	20 V	100 mA	0.2 W	300 MHz	1
MPSA13	5	30 V	300 mA	0.33 W	125 MHz	110
MPSA12	20	20 V	300 mA	0.33 W	125 MHz	13
2N497	12	60 V	600 mA	4 W	30 MHz	1
SC207	5.6	20 V	100 mA	0.2 W	300 MHz	1
2N706A	20	15 V	200 mA	0.36 W	200 MHz	2
BF244	30	30 V	100 mA	0.3 W	170 MHz	3

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC2172	10	18 V	200 mA	0.2 W
2N1005	10	15 V	25 mA	0.15 W
2N3793	10	20 V	500 mA	0.25 W	100 MHz
2N1267	11	10 V	100 mA	0.15 W
2N1268	11	15 V	100 mA	0.15 W
2N1271	11	15 V	100 mA	0.15 W
2N715	10	35 V	100 mA	0.5 W	70 MHz
2N716	10	40 V	100 mA	0.5 W	70 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Trotsky Drive Turret board Verified KT312 Beavis Audio Trotsky Drive	Beavis Audio Trotsky Drive	Overdrive	Tagboard Effects	—	—	—	12