Parts · Transistors

BF244A

1 circuit uses this part.

Substitutes N-channel JFET

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	Vgs max	Id max	Vds	Pd
BF244A	30 V	50 mA	30 V	0.35 W

Used on other boards here

Part	Vgs max	Id max	Vds	Pd	Boards
J113		50 mA	35 V	0.4 W	26
J112		50 mA	35 V	0.4 W	4
J111		50 mA	35 V	0.4 W	1
MPF4393		30 mA	30 V	0.35 W	13
2SK170		20 mA	40 V	0.2 W	2
2N3819	8 V	50 mA	25 V	0.35 W	4
2SK246		14 mA	50 V	0.3 W	2
MPF102	7.5 V	20 mA	25 V	0.35 W	4

Closest by the numbers

Part	Id max	Vds	Pd
2N5640	50 mA	30 V	0.35 W
J203	50 mA	40 V	0.36 W
J204	50 mA	40 V	0.36 W
2SK519	50 mA	30 V	0.35 W
2SK520	50 mA	30 V	0.2 W
J310	50 mA	25 V	0.4 W
2SK518	50 mA	30 V	0.4 W
2N5638	50 mA	30 V	0.35 W

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Juicy Blue Dynamic Bass Overdrive BF244A · CA3130	Blueberry Bass Overdrive	Overdrive	Fuzz Dog	1590B	3	£40.80	52