Parts · Transistors

2N5172

Si NPN BJT.22 circuits use this part. Listed as: BJT transistor, NPN TO-92.

Datasheet · archived copy from Fairchild; the part is discontinued and the maker no longer publishes 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
2N5172	100	25 V	100 mA	0.2 W	200 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N4970	100	30 V	500 mA	0.2 W	200 MHz	1
2N2926	100	25 V	100 mA	0.2 W	100 MHz	3
IT122	100	45 V	50 mA	0.3 W	180 MHz	1
2N4401	100	40 V	600 mA	0.31 W	250 MHz	52
2SC381	90	20 V	100 mA	0.2 W	150 MHz	1
ZTX384	100	30 V	100 mA	0.45 W	150 MHz	1
2N2222	100	30 V	800 mA	0.5 W	250 MHz	129
2N2924	100	25 V	100 mA	0.36 W	100 MHz	3

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BSX81	100	30 V	100 mA	0.23 W	200 MHz
2SC454	100	30 V	100 mA	0.2 W	230 MHz
2SC458	100	30 V	100 mA	0.2 W	230 MHz
2SC458B	100	30 V	100 mA	0.2 W	230 MHz
BFV11	100	30 V	800 mA	0.15 W	200 MHz
BFV53	100	30 V	800 mA	0.15 W
2N4437	100	30 V	500 mA	0.2 W	250 MHz
2SC933	100	30 V	300 mA	0.2 W	250 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Animals Pedal Diamond Peak Overdrive Vero17×14 Verified 2N5172 · 2N5210 Animals pedal Diamond Peak Overdrive	Animals pedal Diamond Peak Overdrive	Fuzz	Dirtbox Layouts	—	3	—	31
Animals Pedal Major Overdrive Vero17×14 Verified 2N5088 · 2N5172 Animals pedal Major Overdrive	Animals pedal Major Overdrive	Overdrive	Dirtbox Layouts	—	3	—	29
Hohner Tri Dirty Booster Vero19×17 Verified 2N5172 Hohner Tri Dirty Booster	Hohner Tri Dirty Booster	Distortion	Dirtbox Layouts	—	3	—	30
Jen Jumbo Fuzz Vero20×16 Unverified 2N5172 Jen Jumbo Fuzz	Jen Jumbo Fuzz	Distortion	Dirtbox Layouts	—	3	—	24
Jen Jumbo Fuzz with gate circuit Vero21×19 Verified 2N5172 · AC127 Jen Jumbo Fuzz with gate circuit	Jen Jumbo Fuzz with gate circuit	Distortion	Dirtbox Layouts	—	3	—	32
Sam Ash Fuzzstainer w. mods Vero17×11 Verified 2N5172 Sam Ash Fuzzstainer w. mods	Sam Ash Fuzzstainer w. mods	Fuzz	Dirtbox Layouts	—	4	—	21
Skreddy Hybrid Overdrive Vero17×14 Verified 2N5172 · 2N5210 Skreddy Hybrid Overdrive	Skreddy Hybrid Overdrive	Overdrive	Dirtbox Layouts	—	3	—	29
AR-318 Sample And Hold and Noise Generator 2N3393 · 2N3638 · 2N4870 · 2N5172	—	Ring Mod / Synth	Experimentalists Anonymous	—	2	—	132
ARP 4012 LPF 2N5172 · 2N6076 · AD3958 · LM301A	—	Other	Experimentalists Anonymous	—	—	—	66
EMS VCS3 Envelope Generator 2N4288 · 2N5163 · 2N5172 · 2N5461	—	Wah / Envelope	Experimentalists Anonymous	—	—	—	66
EMS VCS3 Osillator 2N4288 · 2N5172 · ? · ME9002	—	Ring Mod / Synth	Experimentalists Anonymous	—	4	—	74
Jen HF Modulator 2N5172 Jen HF Modulator	Jen HF Modulator	Phaser	Experimentalists Anonymous	—	—	—	20
Oberheim 2 Voice Keyboard 2N3905 · 2N4391 · 2N5172 · 536	—	Ring Mod / Synth	Experimentalists Anonymous	—	2	—	56
Oberheim Matrix 6 2N5172 · 2SA1005 · 2SC1675 · 2SC2785	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	251
Oberheim Mini Sequencer 1458 · 2N3905 · 2N4302 · 2N5172	—	Ring Mod / Synth	Experimentalists Anonymous	—	1	—	154
Oberheim Mini-Sequencer 1458 · 2N3905 · 2N4302 · 2N5172	—	Ring Mod / Synth	Experimentalists Anonymous	—	1	—	169
Oberheim SEM-1A 2N3638A · 2N3905 · 2N4302 · 2N5172	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	373
Sallen Key 2P Filters 2N5138 · 2N5172	—	Other	Experimentalists Anonymous	—	—	—	25
Plexi Beast 2N5088 · 2N5172 Animal Pedals Major OD · 1590B	Animal Pedals Major OD	Overdrive	Fuzz Dog	1590B	3	£28.80	36
Fuzz Stain 2N5172 Sam Ash Fuzz-Stainer · 125B	Sam Ash Fuzz-Stainer	Fuzz	PedalPCB	125B	4	$8.00	28
Old Fashioned 2N5088 · 2N5172 Animals pedal Major Overdrive	Animals pedal Major Overdrive	Distortion	Sheepylove	—	4	€10.00	36
VOX V846-HW Hand-Wired Turret board 2N5172 Vox V846-HW Hand-Wired	Vox V846-HW Hand-Wired	Wah / Envelope	turretboard.org	—	1	—	17