Parts · Transistors

2SC2291

Si NPN BJT.1 circuit uses 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
2SC2291	250	100 V	50 mA	0.4 W	50 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2SC2240	200	120 V	100 mA	0.3 W	50 MHz	9
2SC2240GR	200	120 V	100 mA	0.3 W	50 MHz	3
2SC2240BL	350	120 V	100 mA	0.3 W	50 MHz	4
2SC1452	150	150 V	50 mA	0.7 W	65 MHz	1
2N3700	100	80 V	1000 mA	0.5 W	100 MHz	4
MPSA06G	100	80 V	500 mA	0.63 W	100 MHz	1
BC546	110	80 V	100 mA	0.5 W	300 MHz	4
2N5551	80	160 V	600 mA	0.31 W	100 MHz	6

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC2259	250	100 V	50 mA	0.4 W	50 MHz
2SC2543	250	90 V	100 mA	0.4 W	45 MHz
2SC2546	250	90 V	100 mA	0.4 W	45 MHz
2SC2544	250	120 V	100 mA	0.4 W	45 MHz
2SC2547	250	120 V	100 mA	0.4 W	45 MHz
BCX82	250	80 V	100 mA	0.4 W	75 MHz
BSX47-16	250	80 V	1000 mA	1 W	50 MHz
2SC1399	225	80 V	50 mA	0.25 W	50 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Roland TB-303 2SB596(O) · 2SB647(C) · 2SC1583 · 2SC2291 Roland TB-303	Roland TB-303	Ring Mod / Synth	Experimentalists Anonymous	—	7	—	266