Parts · Transistors

BC549

6 circuits use this part. Listed as: BC549c preferred; TO-92 Inline Wide-large-solderpads.

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
BC549	110	30 V	100 mA	0.5 W	200 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC548	110	30 V	100 mA	0.5 W	300 MHz	4
2N2222	100	30 V	800 mA	0.5 W	250 MHz	51
BC547	110	50 V	100 mA	0.5 W	300 MHz	2
MPS4124	120	25 V	200 mA	0.625 W	170 MHz	1
BC546A	110	65 V	100 mA	0.5 W	150 MHz	2
BC107	110	45 V	100 mA	0.3 W	150 MHz	4
BC183A	120	30 V	200 mA	0.3 W	150 MHz	2
BC183	120	30 V	200 mA	0.3 W	150 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC548A	110	30 V	100 mA	0.5 W	200 MHz
BC547A	110	45 V	100 mA	0.5 W	200 MHz
BC849BF	110	30 V	100 mA	0.33 W	250 MHz
BSW83	100	25 V	500 mA	0.5 W
BC847A-AU	110	45 V	100 mA	0.33 W
2N2540	100	30 V	500 mA	0.5 W	250 MHz
BFV63	100	30 V	800 mA	0.5 W	250 MHz
BFX95	100	30 V	800 mA	0.5 W	250 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Buffer Up BC549	Pete Cornish LD1	Utility	Five Cats Pedals	1590A	—	£4.50	18
Cream Buffer Board-Mount BC549	LD-1	Utility	Fuzz Dog	1590A	—	£21.60	16
May 83 Treble Boost BC549	TB83	Boost	Fuzz Dog	1590B	1	£19.20	16
Signal Sloth BC549 · LM741 · N-CHANNEL	Slow Gear	Delay	Fuzz Dog	1590B	2	£46.80	56
Fiery Red Horse BC549 · NE555	Saturated Fuzz	Fuzz	Madbean	1590B	6	—	39
Procrastinator 2SK30A · BC549 · TL071	Boss SG-1 Slow Gear	Other	PedalPCB	125B	2	$8.00	59