Parts · Transistors

2SC945K

Si NPN BJT TO-92 TH.3 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
2SC945	75	40 V	100 mA	0.25 W	125 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N3416	75	50 V	500 mA	0.36 W		1
2SC828A	65	45 V	50 mA	0.25 W	110 MHz	1
2SC828	65	30 V	50 mA	0.25 W	110 MHz	27
2SC2458	70	50 V	150 mA	0.2 W	80 MHz	10
MPS6513	90	30 V	100 mA	0.31 W	125 MHz	6
2SC1815	70	50 V	150 mA	0.4 W	80 MHz	85
2SC2712	70	50 V	150 mA	0.15 W	80 MHz	1
2SC536	60	30 V	100 mA	0.2 W	115 MHz	4

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BSW88	75	30 V	100 mA	0.3 W
BSW89	75	30 V	100 mA	0.3 W
BC207	75	45 V	100 mA	0.3 W	150 MHz
BSW42A	75	50 V	200 mA	0.3 W	150 MHz
BSW42AK	75	50 V	200 mA	0.3 W	150 MHz
BSX51A	75	50 V	200 mA	0.3 W	150 MHz
2N6222	75	60 V	100 mA	0.36 W
BFT30CSM	75	60 V	1000 mA	0.36 W

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
BOSS DR-100 2SA1115F · 2SB642R · 2SC2603F · 2SC945K Boss DR-100	Boss DR-100	Ring Mod / Synth	Experimentalists Anonymous	—	4	—	289
BOSS DR-110 2SA1115F · 2SB642R · 2SC2603F · 2SC945K Boss DR-110	Boss DR-110	Ring Mod / Synth	Experimentalists Anonymous	—	4	—	288
Korg MS10 14007 · 14069 · 2SA564A(S) · 2SC1583G Korg MS10	Korg MS10	Ring Mod / Synth	Experimentalists Anonymous	—	1	—	267