Parts · Transistors

KT315B

Si NPN BJT.3 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
KT315B	50	20 V	100 mA	0.15 W	250 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N4123	50	30 V	200 mA	0.31 W	240 MHz	2
2N3903	50	40 V	200 mA	0.31 W	250 MHz	15
2N2712	75	18 V	100 mA	0.2 W		1
2SC536	60	30 V	100 mA	0.2 W	115 MHz	4
2N3904	40	40 V	200 mA	0.31 W	300 MHz	870
2N3397	55	25 V	100 mA	0.2 W	60 MHz	1
MPSA05	50	60 V	500 mA	0.33 W	100 MHz	6
2SC1175	40	45 V	200 mA	0.3 W	170 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC1607	50	20 V	100 mA	0.18 W
2SC1608	50	20 V	100 mA	0.18 W	243 MHz
BFV37	50	30 V	100 mA	0.15 W
BSX53	50	30 V	100 mA	0.15 W	200 MHz
BFV38	50	45 V	100 mA	0.15 W
BFV51	50	30 V	800 mA	0.15 W	175 MHz
BFY19	50	20 V	100 mA	0.3 W	300 MHz
2N339	50	55 V	60 mA	0.15 W

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Borisov Formanta Fuzz Vero15×10 Verified KT315B Borisov Formanta Fuzz	Borisov Formanta Fuzz	Fuzz	Dirtbox Layouts	—	4	—	24
Kazan Vibrato Vero18×18 Unverified KP303 · KT315B · MP26B · P416B Kazan Vibrato	Kazan Vibrato	Tremolo	Dirtbox Layouts	—	3	—	25
Slava Ukraine GT310B · KP103G · KP103L · KT315A Ltava Fuzz Wah · 1590DD	Ltava Fuzz Wah	Tremolo	PCB Guitar Mania	1590DD	8	€1.00 out	127