Parts · Transistors

BC237

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
BC237	110	45 V	100 mA	0.3 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC107	110	45 V	100 mA	0.3 W	150 MHz	13
BC107A	110	45 V	100 mA	0.3 W	150 MHz	3
2SC2785	110	50 V	100 mA	0.25 W	150 MHz	2
BC847	110	45 V	100 mA	0.2 W	150 MHz	1
BC182	120	50 V	200 mA	0.3 W	150 MHz	7
IT122	100	45 V	50 mA	0.3 W	180 MHz	1
BC546A	110	65 V	100 mA	0.5 W	150 MHz	5
BC547A	110	45 V	100 mA	0.5 W	200 MHz	4

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC451	110	45 V	100 mA	0.3 W	150 MHz
BC451A	110	45 V	100 mA	0.3 W	150 MHz
BFY42	110	45 V	100 mA	0.3 W	150 MHz
BC147	110	45 V	200 mA	0.25 W	150 MHz
BC147A	110	45 V	200 mA	0.25 W	150 MHz
BC407	110	45 V	100 mA	0.25 W	150 MHz
BC407A	110	45 V	100 mA	0.25 W	150 MHz
BC267A	110	45 V	1000 mA	0.375 W	150 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	High output noise generator BC237	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	6