Parts · Transistors

2N4124

Si NPN BJT TO-92 TH.14 circuits use this part.

Datasheets: Fairchild · onsemi · archived copies from 2 fabs; the part is discontinued and the makers no longer publish it

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
2N4124	120	25 V	200 mA	0.31 W	300 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
S8050	120	25 V	500 mA	0.3 W	150 MHz	1
BC548	110	30 V	100 mA	0.5 W	300 MHz	13
BC183	120	30 V	200 mA	0.3 W	150 MHz	7
BC183A	120	30 V	200 mA	0.3 W	150 MHz	3
BC108	120	20 V	100 mA	0.3 W	150 MHz	56
BC108A	120	20 V	100 mA	0.3 W	150 MHz	3
KC508	125	20 V	100 mA	0.3 W	175 MHz	1
BC547	110	50 V	100 mA	0.5 W	300 MHz	34

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC3488Y	120	25 V	300 mA	0.3 W	300 MHz
2N5376	120	30 V	500 mA	0.36 W	300 MHz
BC585	120	20 V	100 mA	0.35 W
2SC5874S	120	30 V	1000 mA	0.3 W	250 MHz
BCW31LT1	110	20 V	100 mA	0.3 W	300 MHz
BCW31LT3	110	20 V	100 mA	0.3 W	300 MHz
2SC5730	120	30 V	1000 mA	0.5 W	270 MHz
BCW60FF	125	32 V	100 mA	0.33 W	250 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
DOD 525 2N4124 · CA3094 · CD4007 · CD4007UB DOD 525	DOD 525	Compressor	Experimentalists Anonymous	—	3	—	33
DOD 545 2N4124 · CA3094 · CD4007 · CD4007UB DOD 545	DOD 545	Other	Experimentalists Anonymous	—	3	—	32
DOD 565 2N4124 · CD4007 · CD4007UB · J111 DOD 565	DOD 565	Vibrato / Chorus	Experimentalists Anonymous	—	3	—	40
DOD 575 2N4124 · ? · CD4007 · CD4007UB DOD 575	DOD 575	Flanger	Experimentalists Anonymous	—	3	—	48
DOD 585 2N4124 · CD4007 · CD4007UB · J111 DOD 585	DOD 585	Delay	Experimentalists Anonymous	—	3	—	45
DOD 595 2N4124 · CD4007 · CD4007UB · J111 DOD 595	DOD 595	Phaser	Experimentalists Anonymous	—	3	—	33
DOD 908A 2N4124 · 2N4125 · 2N5089 · 4042B DOD 908A	DOD 908A	Delay	Experimentalists Anonymous	—	—	—	50
DOD FX54 1458 · 2N4124 · 2N5088 · CA3080 DOD FX54	DOD FX54	Distortion	Experimentalists Anonymous	—	4	—	106
DOD FX64 2N4124 · 2N5088 · 4007A · 4558 DOD FX64	DOD FX64	Vibrato / Chorus	Experimentalists Anonymous	—	4	—	130
DOD FX67 Dual Turbo Chorus 1458 · 2N4124 · 2N5088 · CD4007 DOD FX67 Dual Turbo Chorus	DOD FX67 Dual Turbo Chorus	Vibrato / Chorus	Experimentalists Anonymous	—	4	—	54
DOD FX75 2N4124 · 2N4125 · 2N5089 · CD4007 DOD FX75	DOD FX75	Flanger	Experimentalists Anonymous	—	—	—	51
DOD FX90 2N4124 · 2N5089 · CD4007 · CD4007UB DOD FX90	DOD FX90	Delay	Experimentalists Anonymous	—	3	—	54
Digitech XP100 2N4124 · 2N4125 · 4464 · 74AC04 DigiTech XP100	DigiTech XP100	Vibrato / Chorus	Experimentalists Anonymous	—	—	—	196
Paia Motion Filter 2N4124 · 4066 · 4136 · CD4066	—	EQ / Filter	Experimentalists Anonymous	—	2	—	25