Parts · Transistors

KT315A

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
KT315A	30	25 V	100 mA	0.15 W	250 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BF244	30	30 V	100 mA	0.3 W	170 MHz	3
2N3904	40	40 V	200 mA	0.31 W	300 MHz	870
2N5845	25	40 V	1000 mA	0.625 W	300 MHz	1
2SC1175	40	45 V	200 mA	0.3 W	170 MHz	1
PN100	40	35 V	500 mA	0.625 W	200 MHz	5
BC170	35	20 V	100 mA	0.3 W	60 MHz	2
2N4123	50	30 V	200 mA	0.31 W	240 MHz	2
2N3903	50	40 V	200 mA	0.31 W	250 MHz	15

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BFV54	30	30 V	800 mA	0.15 W	250 MHz
BFV10	30	30 V	800 mA	0.15 W	200 MHz
BFV50	30	25 V	800 mA	0.15 W	175 MHz
BFV58	30	25 V	500 mA	0.15 W	150 MHz
BFV88C	30	30 V	800 mA	0.3 W	250 MHz
BFW64	30	30 V	50 mA	0.15 W	450 MHz
2N2845	30	30 V	500 mA	0.36 W	250 MHz
BFV88D	30	30 V	800 mA	0.36 W	250 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Ltava Fuzz Wah - modified Vero25×24 Unverified GT310B · KP103K · KT315A · MAX1044 Ltava Fuzz Wah	Ltava Fuzz Wah	Fuzz	Dirtbox Layouts	—	5	—	47
Poltava Fuzz Wah sans LFO Vero21×16 Unverified GT310B · KT315A Poltava Fuzz Wah sans LFO	Poltava Fuzz Wah sans LFO	Fuzz	Dirtbox Layouts	—	2	—	28
Slava Ukraine GT310B · KP103G · KP103L · KT315A Ltava Fuzz Wah · 1590DD	Ltava Fuzz Wah	Tremolo	PCB Guitar Mania	1590DD	8	€1.00 out	127