Parts · Transistors

KT3102E

Si NPN BJT.5 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
KT3102E	400		100 mA	0.25 W	300 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC413C	380	30 V	100 mA	0.3 W	250 MHz	1
BC109C	420	20 V	100 mA	0.3 W	150 MHz	79
BC239C	420	20 V	100 mA	0.3 W	150 MHz	16
BC108C	420	20 V	100 mA	0.3 W	150 MHz	13
BC549C	420	30 V	100 mA	0.5 W	200 MHz	171
BC547C	420	45 V	100 mA	0.5 W	200 MHz	18
BC548C	420	30 V	100 mA	0.5 W	200 MHz	6
BC318C	400	30 V	150 mA	0.31 W	100 MHz	3

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N5235	400	60 V	100 mA	0.33 W
2N5249	400	50 V	100 mA	0.36 W
BCW33L	420	32 V	100 mA	0.225 W
BCW33LT1G	420	32 V	100 mA	0.225 W	300 MHz
BCW33LT3G	420	32 V	100 mA	0.225 W	300 MHz
BCW33LT1	420	20 V	100 mA	0.3 W	300 MHz
BCW33LT3	420	20 V	100 mA	0.3 W	300 MHz
BCF33	420	32 V	100 mA	0.35 W	300 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Electro Harmonix / Sovtek Russian Big Muff Vero19×17 Verified KT3102E Electro-Harmonix Sovtek Russian Big Muff	Electro-Harmonix Sovtek Russian Big Muff	Distortion	Dirtbox Layouts	—	3	—	32
Fuzzhead Fx AN-602 O.D. Vero19×18 Verified KT3102E Fuzzhead Fx AN-602 O.D	Fuzzhead Fx AN-602 O.D	Fuzz	Dirtbox Layouts	—	4	—	31
Lell X-Metal Vero30×25 Unverified 4558 · KT3102E Lell X-Metal	Lell X-Metal	Distortion	Dirtbox Layouts	—	6	—	49
Yerasov Gamma DS1 Distortion Vero19×18 Unverified 574YD2 · KT3102E · KT315 Boss DS-1	Boss DS-1	Distortion	Dirtbox Layouts	—	3	—	31
EHX Civil War Big Muff Vero19×17 Verified KT3102E Electro-Harmonix Big Muff Pi	Electro-Harmonix Big Muff Pi	Fuzz	Tagboard Effects	—	3	—	30