Parts · Transistors

BD140

Si PNP BJT TO-126 TH.1 circuit uses this part.

Substitutes Si PNP 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
BD140	40	80 V	1000 mA	12 W	50 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
MPS-U55	50	60 V	2000 mA	8 W	100 MHz	1
2SB596	40	80 V	4000 mA	30 W	3 MHz	1
2SB586	3000	80 V	8000 mA	100 W		1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SA780A	40	80 V	1000 mA	10 W	60 MHz
2SA1008	40	100 V	2000 mA	15 W	50 MHz
KSA5033	40	60 V	1000 mA	10 W
2N6415	40	60 V	4000 mA	15 W	50 MHz
2N6418	40	80 V	3000 mA	15 W	40 MHz
2SA780K	40	100 V	1000 mA	10 W	60 MHz
2N6417	40	100 V	3000 mA	15 W	40 MHz
2N6419	40	100 V	3000 mA	15 W	40 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Reverb Driver and Receiver BD139 · BD140 · LF351 · TL071	—	Reverb	Experimentalists Anonymous	—	3	—	23