Parts · Transistors

MPS3704

Si NPN BJT TO-92 TH.5 circuits use this part. Listed as: BJT transistor, NPN TO-92.

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
MPS3704	300	30 V	800 mA	0.625 W	100 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N3415	180	25 V	500 mA	0.36 W		1
2SC1852	160	50 V	1000 mA	0.625 W	100 MHz	1
ECG123A	200	40 V	800 mA	0.5 W	300 MHz	1
2SD1616A	135	60 V	1000 mA	0.75 W	100 MHz	1
TIS92	100	40 V	400 mA	0.625 W		4
MPSA05G	100	60 V	500 mA	0.63 W	100 MHz	6
MPSA06G	100	80 V	500 mA	0.63 W	100 MHz	1
2N3700	100	80 V	1000 mA	0.5 W	100 MHz	4

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC2982C	300	30 V	2000 mA	0.5 W	150 MHz
2SC5976	250	30 V	3000 mA	0.625 W
BCX73-40	250	32 V	1000 mA	0.625 W	100 MHz
2SC6134	250	30 V	3000 mA	0.5 W
BCP194A	300	40 V	1000 mA	1 W	150 MHz
2SC6062	250	30 V	5000 mA	0.8 W
BCW77-25	250	32 V	800 mA	0.8 W	100 MHz
BCW73-40	250	32 V	800 mA	0.45 W	100 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
EarthQuaker Devices Spires Vero19×16 Verified 2N4401 · MPS3704 EarthQuaker Devices Spires	EarthQuaker Devices Spires	Fuzz	Dirtbox Layouts	—	4	—	32
EarthQuaker Devices Spires Red Channel Vero14×11 Unverified MPS3704 EarthQuaker Devices Spires Red Channel	EarthQuaker Devices Spires Red Channel	Fuzz	Dirtbox Layouts	—	2	—	18
Red Spike MPS3704 Spires Red Channel / Dream Crusher · 1590B	Spires Red Channel / Dream Crusher	Fuzz	Fuzz Dog	1590B	2	£26.40	21
Spires 2N4401 · MPS3704 EarthQuaker Devices Spires	EarthQuaker Devices Spires	Other	PCBWay: Glory to Ukraine	—	4	—	27
Loft Fuzz (Red) MPS3704 EarthQuaker Devices Spires Red Channel · 125B	EarthQuaker Devices Spires Red Channel	Fuzz	PedalPCB	125B	2	$8.00	22