Parts · Transistors

KSP13

Si NPN Darlington BJT TO-92 TH.3 circuits use this part. Listed as: Darlington BJT transistor, NPN; Darlington BJT transistor, NPN, TO-92; arlington BJT transistor, NPN.

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
KSP13	5000	30 V	500 mA	0.625 W	125 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
BC517	30000	30 V	400 mA	0.625 W	120 MHz	4
2N3704	300	30 V	800 mA	0.36 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
2SC1852	160	50 V	1000 mA	0.625 W	100 MHz	1
2SD1616A	135	60 V	1000 mA	0.75 W	100 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SC1472B	5000	30 V	300 mA	0.5 W	50 MHz
BSP51	5000	60 V	500 mA	1.5 W	150 MHz
BSP52	5000	80 V	500 mA	1.5 W	150 MHz
BSP52T1	5000	80 V	500 mA	1.5 W	150 MHz
BSP52T3	5000	80 V	500 mA	1.5 W	150 MHz
BCX38C	6000	60 V	800 mA	1 W
2SC4169	4000	50 V	1200 mA	1 W
BCX86	4000	25 V	500 mA	0.5 W	80 MHz

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Octahedron Octave Fuzz 2N3906 · KSP13 Roger Mayer Octavia · 125B	Roger Mayer Octavia	Fuzz	Aion FX	125B	3	$12.50	54
Straylight Chorus/Vibe 2N5087 · 2N5088 · 2N5089 · 78L15 Shin-ei Uni-Vibe · 1590BBS	Shin-ei Uni-Vibe	Vibrato / Chorus	Aion FX	1590BBS	5	$16.00	133
Straylight Mini Chorus/Vibe 2N5088 · 2N5089 · 78L15 · KSP13 Shin-ei Uni-Vibe · 125B	Shin-ei Uni-Vibe	Vibrato / Chorus	Aion FX	125B	3	$16.00	123