Parts · Transistors

BC517

Si NPN Darlington BJT.4 circuits use this part. Listed as: BJT.

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
BC517	30000	30 V	400 mA	0.625 W	120 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N5306	7000	25 V	300 mA	0.4 W	60 MHz	14
2N5308	7000	40 V	300 mA	0.4 W	60 MHz	5
KSP13	5000	30 V	500 mA	0.625 W	125 MHz	3
2N6429	400	45 V	200 mA	0.625 W	100 MHz	1
2N3704	300	30 V	800 mA	0.36 W	100 MHz	2
2N6428	200	50 V	200 mA	0.625 W	100 MHz	2
2N3415	180	25 V	500 mA	0.36 W		1
ECG123A	200	40 V	800 mA	0.5 W	300 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC1754	30000	40 V	500 mA	0.625 W	150 MHz
BFX67	35000	60 V	500 mA	0.5 W
MPSW45	25000	40 V	1000 mA	1 W	100 MHz
MPSW45G	25000	40 V	1000 mA	1 W	100 MHz
MPSW45A	25000	50 V	1000 mA	1 W	100 MHz
MPSW45AG	25000	50 V	1000 mA	1 W	100 MHz
MPSW45ARLRAG	25000	50 V	1000 mA	1 W	100 MHz
MPSW45AZL1G	25000	50 V	1000 mA	1 W	100 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Death by Audio Supersonic Fuzz Gun w. osc ctrl Vero16×10 Verified BC517 · MPSA06G Death By Audio Supersonic Fuzz Gun	Death By Audio Supersonic Fuzz Gun	Fuzz	Dirtbox Layouts	—	6	—	20
Maestro Brassmaster Vero27×19 Verified BC337 · BC517 Maestro Brassmaster	Maestro Brassmaster	Fuzz	Dirtbox Layouts	—	3	—	44
Melody Malfunction BC517 · MPSA06 Death By Audio Soundwave Breakdown 2 · 1590B	Death By Audio Soundwave Breakdown 2	Fuzz	Effects Layouts	1590B	1	$6.00	22
Fuzz Blaster 2N5089 · BC517 Death By Audio Supersonic Fuzz Gun · 1590BB	Death By Audio Supersonic Fuzz Gun	Fuzz	PCB Guitar Mania	1590BB	6	€9.90 out	27