Parts · Transistors

BC237B

Si NPN BJT TO-92 TH.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
BC237B	200	45 V	100 mA	0.3 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC107B	200	45 V	100 mA	0.3 W	150 MHz	14
BC550B	200	45 V	100 mA	0.5 W	150 MHz	11
BC546B	200	65 V	100 mA	0.5 W	150 MHz	7
BC547B	200	45 V	100 mA	0.5 W	200 MHz	61
BC209	240	45 V	100 mA	0.3 W	150 MHz	1
CV10440	175	45 V	250 mA	0.3 W	200 MHz	1
2SC1815Y	200	50 V	150 mA	0.4 W	80 MHz	3
2SC2458GR	200	50 V	150 mA	0.2 W	80 MHz	11

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC451B	200	45 V	100 mA	0.3 W	150 MHz
BC147B	200	45 V	200 mA	0.25 W	150 MHz
BC407B	200	45 V	100 mA	0.25 W	150 MHz
BC347B	200	45 V	100 mA	0.3 W	125 MHz
BCW72L	200	45 V	100 mA	0.225 W
BC290	200	40 V	100 mA	0.36 W
BC290A	200	40 V	100 mA	0.36 W
BC290B	200	40 V	100 mA	0.36 W

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Kod DS-4 Distortion Vero17×14 Unverified BC237B · ULY7701 Kod DS-4 Distortion	Kod DS-4 Distortion	Distortion	Dirtbox Layouts	—	3	—	25