Parts · Transistors

BF244

Si NPN BJT TO-92 TH.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
BF244	30	30 V	100 mA	0.3 W	170 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
KT315A	30	25 V	100 mA	0.15 W	250 MHz	3
2SC1175	40	45 V	200 mA	0.3 W	170 MHz	1
PN100	40	35 V	500 mA	0.625 W	200 MHz	5
2N3904	40	40 V	200 mA	0.31 W	300 MHz	870
2N5845	25	40 V	1000 mA	0.625 W	300 MHz	1
2N4123	50	30 V	200 mA	0.31 W	240 MHz	2
2N3568	40	60 V	200 mA	0.3 W	60 MHz	1
2N3903	50	40 V	200 mA	0.31 W	250 MHz	15

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC1129	30	35 V	50 mA	0.3 W	175 MHz
BSX24	30	32 V	100 mA	0.3 W	150 MHz
MPS6532	30	30 V	600 mA	0.31 W	200 MHz
BSW42	30	25 V	200 mA	0.3 W	150 MHz
BFV88	30	30 V	800 mA	0.36 W	200 MHz
BSW41A	30	25 V	500 mA	0.35 W	150 MHz
BFY18	30	40 V	100 mA	0.3 W	200 MHz
BFV88C	30	30 V	800 mA	0.3 W	250 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Auto Swell Perfboard Verified BC182L · BF244 · LF353 Auto Swell	Auto Swell	Boost	Effects Layouts (blog)	—	2	—	29
Autoswell Page 3 BC182L · BF244 · LF353	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	28
BJFE Baby Blue OD Vero24×11 Verified BF244 BJFE Baby Blue OD	BJFE Baby Blue OD	Distortion	Tagboard Effects	—	3	—	27