Parts · Transistors

OC75

3 circuits use this part. Listed as: BJT transistor, PNP Germanium; PNP Germanium; Trans-Can-WIDE.

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
OC75	55	20 V	10 mA	0.125 W	0.1 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
NKT213	50	18 V	250 mA	0.2 W	0.5 MHz	1
OC76	30	32 V	125 mA	0.125 W	0.1 MHz	1
MP41A	50	30 V	150 mA	0.15 W	1 MHz	1
OC71	30	20 V	10 mA	0.125 W	0.3 MHz	5
NKT275	30	15 V	250 mA	0.2 W	0.5 MHz	3
OC81D	20	16 V	10 mA	0.15 W	0.2 MHz	1
NTE102	90	16 V	150 mA	0.15 W	2 MHz	1
2N508	120	16 V	200 mA	0.2 W	2 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
ACY14	54	30 V	50 mA	0.15 W
ACY15	54	30 V	50 mA	0.15 W
2N1955	50	18 V	200 mA	0.2 W
2N320	50	20 V	200 mA	0.225 W	0.1 MHz
2N64	50	22 V	10 mA	0.12 W	0.15 MHz
2N311	50	15 V	50 mA	0.075 W
OC821	50	20 V	150 mA	0.15 W	0.2 MHz
OC1071	45	30 V	50 mA	0.15 W	0.1 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Zonky A02650 · OC44 · OC75 · TC1044SCPA	John Hornby Skewes Zonk Machine MKI	Fuzz	Five Cats Pedals	1590B	2	£4.50	25
Tone Vendor MKI 2G381 · OC75 · TC1044SCPA	Sola Sound Tone Bender MKI	Fuzz	PedalPCB	125B	2	$8.00	23
Zonkbox A02650 · OC44 · OC75 · TC1044SCPA	DAM Zonk Machine	Fuzz	PedalPCB	125B	2	$8.00	25