Parts · Transistors

BC546A

Si NPN BJT TO-92 TH.5 circuits use this part. Listed as: BJT transistor, NPN TO-18; BJT transistor, NPN TO-92.

Datasheet · from onsemi.com

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
BC546A	110	65 V	100 mA	0.5 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
MPS8098	100	60 V	200 mA	0.6 W	150 MHz	1
2SC2785	110	50 V	100 mA	0.25 W	150 MHz	2
BC547	110	50 V	100 mA	0.5 W	300 MHz	34
BC182	120	50 V	200 mA	0.3 W	150 MHz	7
2N3700	100	80 V	1000 mA	0.5 W	100 MHz	4
MPSA05G	100	60 V	500 mA	0.63 W	100 MHz	6
MPSA06G	100	80 V	500 mA	0.63 W	100 MHz	1
2N2219A	100	50 V	800 mA	0.8 W	300 MHz	6

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BC846A-AU	110	65 V	100 mA	0.33 W
BCX55-16T	100	60 V	1000 mA	0.5 W	155 MHz
2N2466	100	60 V	50 mA	0.5 W	160 MHz
2SC6132	100	80 V	1000 mA	0.5 W
2SC5053	120	50 V	1000 mA	0.5 W	150 MHz
BCX56-16T	100	80 V	1000 mA	0.5 W	155 MHz
MPSA55G	100	60 V	100 mA	0.63 W	150 MHz
MPSA55RLRAG	100	60 V	100 mA	0.63 W	150 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Suhr Rufus Fuzz Vero18×15 Verified BC546A · J202 Suhr Rufus Fuzz	Suhr Rufus Fuzz	Fuzz	Dirtbox Layouts	—	4	—	32
Suhr Rufus Fuzz Perfboard Verified BC546A · J202 Suhr Rufus Fuzz · 1590B	Suhr Rufus Fuzz	Fuzz	Effects Layouts (blog)	1590B	4	—	30
Rufus BC546A · J202 Suhr Rufus Fuzz	Suhr Rufus Fuzz	Other	PCBWay: Glory to Ukraine	—	4	—	29
Cujo Fuzz BC546A · J202 Suhr Rufus Fuzz · 125B	Suhr Rufus Fuzz	Fuzz	PedalPCB	125B	6	$10.00	40
Pastel Preamp 2N6429 · BC546A · J201 · TL072 JHS Crayon · 125B	JHS Crayon	Overdrive	PedalPCB	125B	4	$15.00	107