Parts · Transistors

2SC1685S

Si NPN BJT.2 circuits use this part.

Substitutes Si NPN 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
2SC1685	650	50 V	100 mA	0.25 W	75 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N5962	600	45 V	50 mA	0.625 W	100 MHz	2
MPSA18	800	45 V	100 mA	0.31 W	100 MHz	322
2SC1815BL	500	50 V	150 mA	0.4 W	80 MHz	4
2SC1583	500	50 V	100 mA	0.4 W	150 MHz	3
BC850C	520	45 V	100 mA	0.2 W	300 MHz	1
BC847C	520	45 V	100 mA	0.2 W	300 MHz	1
2N5828	400	40 V	100 mA	0.36 W	90 MHz	1
2SC2458BL	350	50 V	150 mA	0.2 W	80 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC3113	600	50 V	150 mA	0.2 W	100 MHz
2SC3113A	600	50 V	150 mA	0.2 W	100 MHz
2SC3112	600	50 V	150 mA	0.4 W	100 MHz
2SC3112A	600	50 V	150 mA	0.4 W	100 MHz
2SC3295	600	50 V	150 mA	0.15 W	100 MHz
2SC3295A	600	50 V	150 mA	0.15 W	100 MHz
BF523	600	45 V	50 mA	0.625 W	100 MHz
2SC1736	500	50 V	100 mA	0.5 W	75 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Korg MS20 2SA564(S) · 2SC1583G · 2SC1685S · 2SC644R Korg MS20	Korg MS20	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	70
	Korg MS50 071 · 072 · 14069 · 2SA733K Korg MS50 Filter	Korg MS50 Filter	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	577