Parts · Transistors

NKT275

Ge PNP BJT TH.13 circuits use this part. Listed as: Germanium Transistor, PNP; Transistor NKT275.

Substitutes Ge 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
NKT275	30	15 V	250 mA	0.2 W	0.5 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
GT402D	30	25 V	500 mA	0.6 W	1 MHz	2
MP39B	20	15 V	150 mA	0.15 W	0.5 MHz	5
AC151	30	24 V	200 mA	0.9 W	1 MHz	2
OC83N	40	20 V	1000 mA	0.22 W	1 MHz	1
NKT213	50	18 V	250 mA	0.2 W	0.5 MHz	12
OC76	30	32 V	125 mA	0.125 W	0.1 MHz	9
MP40	20	15 V	150 mA	0.15 W	1 MHz	1
ACY41	50	18 V	500 mA	0.26 W	1 MHz	5

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N1956	30	16 V	200 mA	0.2 W
2N1957	30	14 V	200 mA	0.2 W
2N2173	30	15 V	750 mA	0.24 W
NKT214	30	18 V	250 mA	0.2 W	0.5 MHz
2N1954	30	20 V	200 mA	0.2 W
NKT205	30	18 V	125 mA	0.18 W	0.5 MHz
NKT242	30	15 V	1000 mA	0.3 W	0.5 MHz
2N573	30	25 V	250 mA	0.2 W

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Analogman Sun Face Vero11×12 Verified NKT275 Analogman Sunface	Analogman Sunface	Fuzz	Dirtbox Layouts	—	3	—	14
Electro Harmonix Germanium Overdrive Vero15×13 Verified 2N5087 · NKT275 Electro-Harmonix Germanium Overdrive	Electro-Harmonix Germanium Overdrive	Fuzz	Dirtbox Layouts	—	3	—	16
Electro Harmonix Germanium OD Perfboard Verified 2N5087 · NKT275 Electro-Harmonix Germanium Overdrive	Electro-Harmonix Germanium Overdrive	Overdrive	Effects Layouts (blog)	—	3	—	14
Fuzz Ace v.2 7660S · ICL7660SCPAZ · NKT275 Dallas Arbiter Fuzz Face · 1590B	Dallas Arbiter Fuzz Face	Fuzz	HotKits	1590B	3	$7.00	23
Analog Sun NKT275 Analogman Sunface · 125B	Analogman Sunface	Fuzz	PCB Guitar Mania	125B	5	€9.90 out	19
Germanium 4 Big Muff NKT275 · PN2222A · TL072 Electro-Harmonix Germanium 4 Big Muff	Electro-Harmonix Germanium 4 Big Muff	Fuzz	PCBWay: Glory to Ukraine	—	8	—	37
Germanium OD 2N5087 · NKT275 Electro-Harmonix Germanium Overdrive	Electro-Harmonix Germanium Overdrive	Overdrive	PCBWay: Glory to Ukraine	—	3	—	14
Sunface (NKT275) NKT275 · TC1044 · TC1044SCPA Analogman Sunface (NKT275)	Analogman Sunface (NKT275)	Other	PCBWay: Glory to Ukraine	—	4	—	18
Soul Vendor NKT275 · TC1044 · TC1044SCPA Fulltone Soul Bender · 125B	Fulltone Soul Bender	Fuzz	PedalPCB	125B	3	$8.00	29
Sunflower Fuzz NKT275 · TC1044 · TC1044SCPA Analogman Sunface · 125B	Analogman Sunface	Fuzz	PedalPCB	125B	5	$8.00	19
Analogman Sunface NKT275 Vero10×8 Verified NKT275 Analogman Sunface (NKT275)	Analogman Sunface (NKT275)	Fuzz	Tagboard Effects	—	3	—	12
EHX Germanium Overdrive Vero13×10 Verified 2N5087 · NKT275 Electro-Harmonix Germanium Overdrive	Electro-Harmonix Germanium Overdrive	Overdrive	Tagboard Effects	—	3	—	14
EHX Germanium4 Big Muff Pi Vero16×14 Unverified NKT275 · PN2222 · TL072 Electro-Harmonix Big Muff Pi · 1590B	Electro-Harmonix Big Muff Pi	Distortion	Tagboard Effects	1590B	4	—	20