Parts · Transistors

MMBT5089

Si NPN BJT SOT-23 SMD.1 circuit uses this part.

Datasheet · from onsemi.com

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
MMBT5089	400	25 V	50 mA	0.3 W	50 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC318C	400	30 V	150 mA	0.31 W	100 MHz	3
BC169C	380	20 V	100 mA	0.3 W	85 MHz	5
2N5828	400	40 V	100 mA	0.36 W	90 MHz	1
2SC871	350	25 V	30 mA	0.2 W	75 MHz	1
2N5088	300	30 V	50 mA	0.31 W	50 MHz	1044
BC109C	420	20 V	100 mA	0.3 W	150 MHz	79
BC239C	420	20 V	100 mA	0.3 W	150 MHz	16
BC108C	420	20 V	100 mA	0.3 W	150 MHz	13

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BSS36	400	25 V	500 mA	0.6 W
BCW33L	420	32 V	100 mA	0.225 W
2N5249	400	50 V	100 mA	0.36 W
2N5235	400	60 V	100 mA	0.33 W
BC168C	380	20 V	100 mA	0.3 W	85 MHz
BC278C	450	25 V	100 mA	0.3 W	75 MHz
BC410	450	30 V	50 mA	0.2 W
2SC732B	350	30 V	100 mA	0.3 W	40 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Red Clay Overdrive 2N7002 · MMBT5089 · TL074 Ibanez Tube Screamer · 125B	Ibanez Tube Screamer	Overdrive	Effects Layouts	125B	5	$5.00	43