Parts · Transistors

OC81D

1 circuit uses this part.

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
OC81D	20	16 V	10 mA	0.15 W	0.2 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
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
OC76	30	32 V	125 mA	0.125 W	0.1 MHz	1
NKT213	50	18 V	250 mA	0.2 W	0.5 MHz	1
OC75	55	20 V	10 mA	0.125 W	0.1 MHz	3
MP41A	50	30 V	150 mA	0.15 W	1 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
AC530	20	15 V	50 mA	0.125 W
2N1450	20	20 V	100 mA	0.12 W
OC828	20	30 V	150 mA	0.15 W	0.2 MHz
OC816	20	15 V	50 mA	0.08 W	0.2 MHz
2N680	18	20 V	100 mA	0.15 W
OC81DM	20	16 V	10 mA	0.125 W	0.4 MHz
OC603	20	12 V	50 mA	0.08 W	0.25 MHz
OC829	20	60 V	150 mA	0.15 W	0.2 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Tone Vendor MKII OC81D · TC1044SCPA	Sola Sound Tone Bender MKII	Fuzz	PedalPCB	125B	2	$8.00	21