Parts · Transistors

ZTX108

Si NPN BJT E-Line TH.1 circuit uses 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
ZTX108	125	30 V	100 mA	0.3 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC183	120	30 V	200 mA	0.3 W	150 MHz	7
BC183A	120	30 V	200 mA	0.3 W	150 MHz	3
S8050	120	25 V	500 mA	0.3 W	150 MHz	1
BC182	120	50 V	200 mA	0.3 W	150 MHz	7
BC107	110	45 V	100 mA	0.3 W	150 MHz	13
BC107A	110	45 V	100 mA	0.3 W	150 MHz	3
BC237	110	45 V	100 mA	0.3 W	150 MHz	1
PN4124	120	25 V	200 mA	0.625 W	170 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC173	125	25 V	100 mA	0.3 W	150 MHz
BC173A	125	25 V	100 mA	0.3 W	150 MHz
2SC2986Y	120	30 V	50 mA	0.3 W	150 MHz
2SC735Y	120	30 V	400 mA	0.3 W	150 MHz
BCW83A	125	30 V	100 mA	0.225 W	150 MHz
BC207A	125	45 V	100 mA	0.3 W	150 MHz
BC209A	125	45 V	100 mA	0.3 W	150 MHz
BC385A	125	45 V	100 mA	0.3 W	150 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	MXR Analog Delay 3 2N4126 · 340T12 · 4558 · CD4001 MXR Analog Delay	MXR Analog Delay	Delay	Experimentalists Anonymous	—	3	—	121