Parts · Transistors

MPSA14

4 circuits use this part. Listed as: BJT darlington transistor, NPN; Darlington 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
MPSA14	10	30 V	300 mA	0.31 W	125 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
MPSA13	5	30 V	300 mA	0.33 W	125 MHz	30
2N5845	25	40 V	1000 mA	0.625 W	300 MHz	1
2N3904	40	40 V	200 mA	0.31 W	300 MHz	282
MPSA05	50	60 V	500 mA	0.33 W	100 MHz	2
2N3903	50	40 V	200 mA	0.31 W	250 MHz	8
2N3053	50	40 V	700 mA	1 W	100 MHz	1
MPSA06	50	80 V	500 mA	0.625 W	100 MHz	2
BC639	40	80 V	1000 mA	1 W	50 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
MPSA27	10	60 V	500 mA	0.325 W	125 MHz
MPSA25	10	40 V	500 mA	0.625 W	125 MHz
2SC456	10	30 V	600 mA	0.75 W	100 MHz
MPSA26	10	50 V	500 mA	0.625 W	125 MHz
BSS79	10	40 V	800 mA	0.35 W	250 MHz
2N707	9	25 V	200 mA	0.3 W	200 MHz
2SC3914	10	50 V	500 mA	0.3 W	250 MHz
2N1506A	10	50 V	500 mA	0.8 W	140 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Aperture Octave Fuzz 2N3904 · MPSA14	Ampeg Scrambler	Fuzz	Aion FX	125B	3	$12.50	53
Sub Synth 2N5088 · CD4046BE · MPSA14	Octave Synth	Fuzz	Fuzz Dog	1590B	2	£30.00	29
Eggsploder 2N5088 · MPSA14	Ampeg Scrambler	Fuzz	Madbean	1590B	3	$10.00	50
Underminer Sub-Octave Synthesizer 2N5088 · CD4046 · MPSA14	Seppuku Sub-Octave Synth	Fuzz	PedalPCB	125B	5	$10.00	32