Parts · Transistors

OC603

Ge PNP BJT TH.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
OC603	20	12 V	50 mA	0.08 W	0.25 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
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
MA287	30	10 V	200 mA	0.175 W		1
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
GT402D	30	25 V	500 mA	0.6 W	1 MHz	2
AC151	30	24 V	200 mA	0.9 W	1 MHz	2
OC83N	40	20 V	1000 mA	0.22 W	1 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
OC602	20	12 V	50 mA	0.08 W	0.3 MHz
OC816	20	15 V	50 mA	0.08 W	0.2 MHz
AC530	20	15 V	50 mA	0.125 W
OC360	20	15 V	35 mA	0.06 W	0.3 MHz
2N222	20	12 V	70 mA	0.07 W	0.4 MHz
2N1450	20	20 V	100 mA	0.12 W
OC622	20	15 V	50 mA	0.05 W	0.2 MHz
OC817	20	15 V	50 mA	0.05 W	0.2 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Telefunken Echomixer "Kanal A" Pre Amp Vero18×10 Verified OC603 Telefunken Echomixer "Kanal A" Pre Amp	Telefunken Echomixer "Kanal A" Pre Amp	Preamp / Amp-in-a-box	Dirtbox Layouts	—	1	—	22