Parts · Transistors

2N5129

Si NPN BJT.2 circuits use 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
2N5129	35	12 V	500 mA	0.2 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
ME9002	30	12 V		0.25 W	400 MHz	1
PN100	40	35 V	500 mA	0.625 W	200 MHz	5
2N1613	40	50 V	600 mA	0.8 W	80 MHz	3
MPSA12	20	20 V	300 mA	0.33 W	125 MHz	13
2N697	40	40 V	500 mA	0.6 W	50 MHz	1
2N2396	40	40 V	300 mA	0.45 W	40 MHz	1
MPSA05	50	60 V	500 mA	0.33 W	100 MHz	6
2N5845	25	40 V	1000 mA	0.625 W	300 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
PN5128	35	12 V	500 mA	0.3 W	150 MHz
2N3794	35	20 V	500 mA	0.25 W	100 MHz
BSV88	35	25 V	1000 mA	0.22 W	100 MHz
2SC1350	40	20 V	300 mA	0.3 W
2N4969	40	30 V	500 mA	0.2 W	150 MHz
2SC395A	30	12 V	500 mA	0.3 W	200 MHz
2N3973	35	30 V	400 mA	0.36 W	200 MHz
2N3975	35	30 V	400 mA	0.36 W	200 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	PAiA Phlanger 2N5129 · 2N5139 · 4013 · 566	—	Flanger	Experimentalists Anonymous	—	5	—	75
	Paia 4720a 2N2712 · 2N3391 · 2N4871 · 2N5129	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	84