Parts · Transistors

BF256C

Si N-ch JFET TO-92 TH.2 circuits use 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
BF256C	30 V	18 mA	30 V	0.35 W

Used on other boards here

Part	Vgs max	Id max	Vds	Pd	Boards
NTE458		20 mA	50 V	0.25 W	2
2SK117		14 mA	50 V	0.3 W	42
2SK184		14 mA	50 V	0.2 W	9
2SK170		20 mA	40 V	0.2 W	10
2N4416	30 V	30 mA	30 V	0.3 W	1
2SK246		14 mA	50 V	0.3 W	9
2N5485	25 V	10 mA	25 V	0.35 W	27
BF244A	30 V	50 mA	30 V	0.35 W	8

Closest by the numbers

Part	Id max	Vds	Pd
2SK606	20 mA	30 V	0.4 W
2SK662	20 mA	30 V	0.15 W
2SK1806	20 mA	30 V	0.25 W
2SK198	20 mA	30 V	0.15 W
2SK1069	20 mA	40 V	0.15 W
2SK771	20 mA	40 V	0.2 W
2SK772	20 mA	40 V	0.3 W
2SK168	20 mA	30 V	0.2 W

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Elektor Distortion Compressor 4066 · BC547 · BC547B · BF256C	—	Distortion	Experimentalists Anonymous	—	—	—	68
	NN Simple Comp BF256C · TL071	—	Compressor	Experimentalists Anonymous	—	—	—	21