Parts · Transistors

2SA970

Si PNP BJT TO-92 TH.5 circuits use this part.

Datasheet · archived copy from Toshiba; the part is discontinued and the maker no longer publishes it

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
2SA970	200	120 V	100 mA	0.3 W	100 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2SA1335	200	120 V	100 mA	0.2 W	100 MHz	4
2SA1312	200	120 V	100 mA	0.15 W	110 MHz	1
2N5401	60	150 V	600 mA	0.31 W	100 MHz	2
MPSA92	25	300 V	500 mA	0.625 W	50 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
BSS53B	200	120 V	100 mA	0.3 W
2SA1049	200	120 V	100 mA	0.2 W	100 MHz
2SA1049GR	200	120 V	100 mA	0.2 W	100 MHz
2SA1163GR	200	120 V	100 mA	0.2 W	100 MHz
BSS54B	200	200 V	100 mA	0.3 W
2SA941	200	120 V	50 mA	0.3 W	150 MHz
2SA1163	200	120 V	150 mA	0.15 W	100 MHz
BSS55B	200	250 V	100 mA	0.3 W

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Boss HM-2 Heavy Metal Perfboard Verified 2SA970 · 2SC2240 · BF245 · TL072 Boss HM-2 Heavy Metal · 125B	Boss HM-2 Heavy Metal	Distortion	Effects Layouts (blog)	125B	5	—	40
BOSS HM-2 2SA970 · 2SC2240 · 2SK30 · M5216 Boss HM-2	Boss HM-2	Distortion	Experimentalists Anonymous	—	—	—	39
Sweetish Death 2SA970 · 2SC2240 · 2SC732 · 2SK30A Boss HM-2 Heavy Metal	Boss HM-2 Heavy Metal	Distortion	Griffin Effects	—	3	$12.00	68
Boss HM-2 Heavy Metal Vero20×26 Verified 2SA970 · 2SC2240 · BF245 · M5216 Boss HM-2 Heavy Metal · 1590B	Boss HM-2 Heavy Metal	Distortion	Tagboard Effects	1590B	4	—	40
Boss HM-2 Heavy Metal Lite Vero Verified 2SA970 · 2SC2240 · BF245 · M5216 Boss HM-2 Heavy Metal Lite · 1590B	Boss HM-2 Heavy Metal Lite	Distortion	Tagboard Effects	1590B	4	—	33