Parts · Transistors

OC81D

Ge PNP BJT TH.3 circuits use 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
OC603	20	12 V	50 mA	0.08 W	0.25 MHz	1
MP39B	20	15 V	150 mA	0.15 W	0.5 MHz	5
MP40	20	15 V	150 mA	0.15 W	1 MHz	1
OC82D	30	16 V	10 mA	0.15 W	0.2 MHz	1
MP16	20	15 V	20 mA	0.2 W	1 MHz	1
OC71	30	20 V	10 mA	0.125 W	0.3 MHz	18
NKT275	30	15 V	250 mA	0.2 W	0.5 MHz	13
OC76	30	32 V	125 mA	0.125 W	0.1 MHz	9

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
OC829	20	60 V	150 mA	0.15 W	0.2 MHz
OC602	20	12 V	50 mA	0.08 W	0.3 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Tone Bender MKII OC81D · TC1044 · TC1044SCPA Sola Sound Tone Bender MKII	Sola Sound Tone Bender MKII	Fuzz	PCBWay: Glory to Ukraine	—	2	—	15
Tone Bender MKII (PCB2) OC81D · TC1044 · TC1044SCPA Sola Sound Tone Bender MKII	Sola Sound Tone Bender MKII	Fuzz	PCBWay: Glory to Ukraine	—	2	—	15
Tone Vendor MKII OC81D · TC1044 · TC1044SCPA Sola Sound Tone Bender MKII · 125B	Sola Sound Tone Bender MKII	Fuzz	PedalPCB	125B	2	$8.00	21