Parts · Transistors

BC549

Si NPN BJT TO-92 TH.40 circuits use this part. Listed as: BC549c preferred; TO-92 Inline Wide-large-solderpads.

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
BC549	110	30 V	100 mA	0.5 W	200 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
BC548A	110	30 V	100 mA	0.5 W	200 MHz	2
BC547A	110	45 V	100 mA	0.5 W	200 MHz	4
BC548	110	30 V	100 mA	0.5 W	300 MHz	13
2N2222	100	30 V	800 mA	0.5 W	250 MHz	129
BC547	110	50 V	100 mA	0.5 W	300 MHz	34
ZTX384	100	30 V	100 mA	0.45 W	150 MHz	1
TIS92	100	40 V	400 mA	0.625 W		4
PN4124	120	25 V	200 mA	0.625 W	170 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
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
2N5107	100	30 V	500 mA	0.36 W	200 MHz
BC452	110	30 V	100 mA	0.3 W	150 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
CornyKloneBuff BC549 Klon Centaur · 1590LB	Klon Centaur	Utility	delyk PCBs	1590LB	—	—	14
Cornish TB-83 Treble Booster Vero12×9 Verified BC549 Cornish TB-83 Treble Booster	Cornish TB-83 Treble Booster	Boost	Dirtbox Layouts	—	—	—	14
Fjord Fuzz Berserk V1 Vero15×12 Verified 2N3704 · 2N4123 · BC549 Fjord Fuzz Berserk V1	Fjord Fuzz Berserk V1	Fuzz	Dirtbox Layouts	—	3	—	20
Fjord Fuzz Embla V1 Vero13×10 Verified BC549 Fjord Fuzz Embla V1	Fjord Fuzz Embla V1	Boost	Dirtbox Layouts	—	2	—	15
VFE 5:00 Fuzz Vero20×19 Unverified BC549 · MPSA18 VFE 5:00 Fuzz	VFE 5:00 Fuzz	Distortion	Dirtbox Layouts	—	4	—	40
Vitalka Crotalus Atrox Vero21×16 Verified BC549 · TL072 Vitalka Crotalus Atrox	Vitalka Crotalus Atrox	Preamp / Amp-in-a-box	Dirtbox Layouts	—	4	—	31
Bigger Muff 2N5088 · BC549 Big Muff Pi and Muff Fuzz boost, two effects in one PCB · 1590BB2	Big Muff Pi and Muff Fuzz boost, two effects in one PCB	Fuzz	Dirt Monger Instruments	1590BB2	4	CA$12.00	63
Distortion H BC549 · TL072 · TL074 Distortion H · 1590BBS	Distortion H	Distortion	Dirt Monger Instruments	1590BBS	7	CA$16.50	88
Boss SG-1 Slow Gear Perfboard Verified 2SK30A · BC549 · TL071 Boss SG-1 Slow Gear · 1590B	Boss SG-1 Slow Gear	Utility	Effects Layouts (blog)	1590B	2	—	34
Cornish Buffer Perfboard Verified BC549 Cornish Buffer · 1590A	Cornish Buffer	Utility	Effects Layouts (blog)	1590A	—	—	16
Cornish G-2 Perfboard Verified BC549 Cornish G-2 · 1590B	Cornish G-2	Utility	Effects Layouts (blog)	1590B	3	—	37
Exar OD-2 Perfboard Verified BC549 · BC560 · J113 Exar OD-2	Exar OD-2	Overdrive	Effects Layouts (blog)	—	3	—	22
One-Knob Noise Gate Perfboard Verified BC549 · BS170 One-Knob Noise Gate · 1590A	One-Knob Noise Gate	Noise Gate	Effects Layouts (blog)	1590A	1	—	16
Light Metal Effects Penfold Ring Mod 4001BE · 4016BE · 741 · BC549	—	Distortion	Experimentalists Anonymous	—	—	—	89
Mini Synth like Super DF-2 Page 1 4013 · 4016 · 4046 · BC549	—	Ring Mod / Synth	Experimentalists Anonymous	—	1	—	76
Mini Synth like Super DF-2 Page 4 4013 · 4016 · 4046 · BC549	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	76
Mini Synth like Super DF-2 Page 5 4013 · 4016 · 4046 · BC549	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	75
Misc Vibrato Effect page 2 1458 · BC549	—	Vibrato / Chorus	Experimentalists Anonymous	—	2	—	15
Transistor headphone amplifier BC549 · BC559	—	Other	Experimentalists Anonymous	—	—	—	14
Buffer Up BC549 Pete Cornish LD1 · 1590A	Pete Cornish LD1	Utility	Five Cats Pedals	1590A	—	£4.50	18
Cream Buff guitar signal buffer BC549 LD-1 · 1590A	LD-1	Utility	Fuzz Dog	1590A	—	£16.80	17
Cream Buffer Board-Mount BC549 LD-1 · 1590A	LD-1	Utility	Fuzz Dog	1590A	—	£21.60	16
May 83 Treble Boost BC549 TB83 · 1590B	TB83	Boost	Fuzz Dog	1590B	1	£19.20	16
Signal Sloth 741 · BC549 · LM741 Boss SG-1 Slow Gear · 1590B	Boss SG-1 Slow Gear	Delay	Fuzz Dog	1590B	2	£46.80	56
Fiery Red Horse BC549 · MPSA18 · NE555 Saturated Fuzz · 1590B	Saturated Fuzz	Fuzz	Madbean	1590B	6	—	38
Treble booster BC549 May 83 Treble booster	May 83 Treble booster	Boost	PCBWay: Glory to Ukraine	—	1	—	16
Procrastinator 2SK30A · BC549 · TL071 Boss SG-1 Slow Gear · 125B	Boss SG-1 Slow Gear	Other	PedalPCB	125B	2	$8.00	59
Pete Cornish Input Buffer BC549 Cornish Buffer	Cornish Buffer	Utility	Revolution Deux	—	—	—	13
Pete Cornish LD-1 Buffer Vero BC549 Cornish Buffer	Cornish Buffer	Utility	Revolution Deux	—	—	—	13
KDLA A Modulated Delay with Adjustable LFO Shape and Extended Delay Time 7805 · BC549 · LM7805 · TL072	—	Delay	Scientific Guitarist	—	4	—	45
MLS-5+ A 5-loop, MIDI-Controlled Switcher 6N138 · 7805 · 7805TV · BC549 1032L	—	Utility	Scientific Guitarist	1032L	—	—	126
Spare Room Reverb Phenomenal Reverb Powers, Itty Bitty Pedalboard Space 78L05Z · BC549 · DIP16 · TL072 1590A	—	Reverb	Scientific Guitarist	1590A	1	—	85
Triplicator Stereo Triple Tracker with Effects Loops 7805 · 7805T · BC549 · ES56033E	—	Other	Scientific Guitarist	—	10	—	130
CBS Arbiter Doubler Vero19×17 Verified BC549 CBS Arbiter Doubler	CBS Arbiter Doubler	Fuzz	Tagboard Effects	—	3	—	29
Cornish Buffer Vero14×9 Verified BC549 Cornish Buffer	Cornish Buffer	Utility	Tagboard Effects	—	—	—	16
Emma ReezaFRATzitz RF1 Vero22×19 Verified BC549 · CD4069 · CD4069UB EMMA ReezaFRATzitz · 1590B	EMMA ReezaFRATzitz	Distortion	Tagboard Effects	1590B	4	—	21
Joyo Roll Boost Vero9×8 Verified BC549 Joyo Roll Boost	Joyo Roll Boost	Boost	Tagboard Effects	—	1	—	10
Lovetone Big Cheese Vero20×16 Verified BC549 · TL072 Lovetone Big Cheese	Lovetone Big Cheese	Fuzz	Tagboard Effects	—	3	—	31
MI Audio Boost & Buff Tagboard Verified BC549 MI Audio Boost 'n' Buff V1	MI Audio Boost 'n' Buff V1	Boost	Tagboard Effects	—	1	—	9
Tube Driver1590BB 40106N · 7806 · 78L05ACZ · BC549 Chandler Tube Driver · 1590BB	Chandler Tube Driver	Overdrive	TH Custom Effects	1590BB	4	€14.55	51