Parts · Transistors

MPS4125

Si PNP BJT TO-92 TH.1 circuit uses this part.

Substitutes Si 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
MPS4125	50	30 V	200 mA	0.625 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
MPSA65	50	30 V	300 mA	0.625 W	100 MHz	2
PN200	40	35 V	500 mA	0.625 W	150 MHz	1
2N3702	60	25 V	200 mA	0.36 W	100 MHz	5
2N2904A	40	60 V	600 mA	0.6 W	200 MHz	1
2N2907	35	40 V	600 mA	0.4 W	200 MHz	38
BC327	63	45 V	800 mA	0.5 W	60 MHz	3
BC556	75	65 V	100 mA	0.5 W	150 MHz	1
BC558	75	25 V	100 mA	0.5 W	75 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BSW36	50	32 V	500 mA	0.8 W	150 MHz
PN4890	50	40 V	500 mA	0.625 W	160 MHz
BC529	50	30 V	200 mA	0.625 W	100 MHz
BC139A	50	30 V	500 mA	0.7 W	100 MHz
2N3244	50	30 V	1000 mA	1 W	175 MHz
BC291	50	40 V	100 mA	0.36 W
BC462	50	28 V	1500 mA	0.88 W	100 MHz
BC527	50	60 V	1000 mA	0.625 W	120 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	DOD FX75B 1458 · 2N5088 · 4007 · CD4007UB DOD FX75B	DOD FX75B	Flanger	Experimentalists Anonymous	—	4	—	102