Parts · Transistors

BC109

20 circuits use this part. Listed as: BJT transistor, NPN TO-18; Semiconductors; 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
BC109	180	20 V	100 mA	0.3 W	150 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC239	200	20 V	100 mA	0.3 W	150 MHz	1
BC107B	200	45 V	100 mA	0.3 W	150 MHz	4
BC549B	200	30 V	100 mA	0.5 W	200 MHz	8
BC548B	200	30 V	100 mA	0.5 W	200 MHz	4
BC550B	200	45 V	100 mA	0.5 W	150 MHz	2
BC184	240	30 V	200 mA	0.3 W	150 MHz	4
BC183B	240	30 V	200 mA	0.3 W	150 MHz	1
BC546B	200	65 V	100 mA	0.5 W	150 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BSW43	180	25 V	200 mA	0.3 W	150 MHz
BSX52	180	25 V	200 mA	0.3 W	150 MHz
BC4115	180	20 V	2000 mA	0.4 W	150 MHz
2N3415	180	25 V	500 mA	0.36 W
BC108B	200	20 V	100 mA	0.3 W	150 MHz
BC238B	200	20 V	100 mA	0.3 W	150 MHz
BC239A	200	20 V	100 mA	0.3 W	150 MHz
BC239B	200	20 V	100 mA	0.3 W	150 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Plasma (Legacy) BC109	Colorsound Overdriver	Overdrive	Aion FX	1590B	5	—	38
One-Knobber BC108 · BC109	—	Fuzz	Effects Layouts	1590A	1	$4.25	14
Dark Side of the Fuzz BC109	Skreddy Pedals Lunar Module	Fuzz	Five Cats Pedals	—	5	£4.50	37
One Knob Fuzz Guitar PCB BC108 · BC109	Colorsound 1-Knob Fuzz DAM Meathead DAM Meathead - Dark Dr.Tony.Balls 1966 Black Arts Toneworks Ritual Fuzz	Fuzz	Five Cats Pedals	1590A	1	£15.00	17
One Knob Fuzz Guitar PCB BC108 · BC109	Colorsound 1-Knob Fuzz DAM Meathead DAM Meathead - Dark Dr.Tony.Balls 1966 Black Arts Toneworks Ritual Fuzz	Fuzz	Five Cats Pedals	1590A	1	£4.00	17
Aceed Noir Fuzz BC109	Black Acid	Fuzz	Fuzz Dog	1590B	2	£26.40	15
Mutantes Fuzz BC109	Regulus VIII fuzz	Fuzz	Fuzz Dog	1590B	1	£27.60	19
One Knob Fuzz BC108 · BC109	Colorsound One Knob Fuzz / Ritual / Fuzzbud / Meathead	Fuzz	Fuzz Dog	1590B	1	£21.60	12
Schaller Fuzz BC109	Schaller Fuzz	Fuzz	Fuzz Dog	1590B	2	£24.00	16
Vintage Pow - Colorsound Overdriver / Power Boost 7660SEPA · BC109	Colorsound Overdriver / Power Boost	Fuzz	Fuzz Dog	1590B	4	£33.60	41
ColorTone Overdriver v3 BC109	—	Overdrive	GuitarPCB	—	1	$7.95 out	14
D.S.O.T.M. Fuzz v4 Best Floyd Era Fuzz PCB BC109	—	Fuzz	GuitarPCB	—	4	$8.95 out	35
One Knob Fuzz v2 BC108 · BC109	—	Fuzz	GuitarPCB	—	1	$5.95 out	15
Moon Lander BC109	Lunar Deluxe (Fuzz Face)	Fuzz	JMK PCBs	—	2	$10.00 out	29
Cosmopolitan AC127 · BC109 · BS170	Skreddy Screwdriver	Fuzz	Madbean	1590B	5	$10.00	41
Dark Grime BC109	EFE Black Dust	Fuzz	Mask Audio Electronics	1590G	1	$4.00	17
Das Schallert Ordentlich BC109	Schaller Fuzz (silicon version)	Fuzz	Moonn Electronics	—	2	€4.50	16
Third Eye BC109	Arbiter Treble and Bass Face	Boost	Moonn Electronics	—	3	€4.50	26
Wabern BC109	Schaller Tremolo	Vibrato / Chorus	Moonn Electronics	—	2	€5.50	32
Powersound Overdrive BC109	Colorsound Overdriver	Fuzz	PedalPCB	125B	4	$12.00	36