Parts · Transistors

SFT337

Ge PNP BJT TH.3 circuits use this part.

Substitutes Ge PNP 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
SFT337	100	15 V	100 mA	0.15 W	1 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
NTE102	90	16 V	150 mA	0.15 W	2 MHz	3
2SB22	95	25 V	75 mA	0.17 W	0.4 MHz	2
ASY33	90	30 V	300 mA	0.15 W	0.5 MHz	1
2N508	120	16 V	200 mA	0.2 W	2 MHz	2
2G381	75	20 V	500 mA	0.25 W	1 MHz	5
2SB54	80	20 V	150 mA	0.15 W	0.5 MHz	5
2SB56	80	25 V	150 mA	0.15 W	0.5 MHz	1
OC46	80	20 V	125 mA	0.083 W	2 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N360	100	18 V	200 mA	0.17 W	1 MHz
AC188	100	15 V	2000 mA	0.225 W	1 MHz
2N571	100	25 V	300 mA	0.15 W	1.2 MHz
2N572	100	25 V	300 mA	0.12 W	1.2 MHz
AC518	85	20 V	200 mA	0.16 W	1 MHz
AC542	80	15 V	50 mA	0.15 W	1 MHz
GT2694	80	15 V	50 mA	0.15 W
AC126	100	12 V	100 mA	0.5 W	1 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Vox Tonebender Mk. 1,5 Italy Vero11×8 Verified SFT337 · SFT363 Vox Tonebender Mk. 1,5 Italy	Vox Tonebender Mk. 1,5 Italy	Fuzz	Dirtbox Layouts	—	2	—	14
Vox Tone Bender SFT337 · SFT363 Vox Tone Bender	Vox Tone Bender	Fuzz	Experimentalists Anonymous	—	—	—	12
Vox Tone Bender SFT337 · SFT363E Vox Tone Bender	Vox Tone Bender	Fuzz	Revolution Deux	—	2	—	14