BAS70 from hongjiacheng, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	A	passive	Anode of the Schottky barrier diode. Forward current flows from anode (pin 1) to cathode (pin 3). Max forward voltage 410 mV at IF = 1 mA, 1000 mV at IF = 15 mA.
2	NC	unconnected	No internal connection on the single BAS70 variant in SOT-23. Left floating on the die; may be tied to the anode or cathode on the PCB to improve heat sinking.
3	K	passive	Cathode of the Schottky barrier diode. Denoted by the cathode line marking on the package. Reverse breakdown 70 V; reverse leakage IR < 0.2 µA at VR = 50 V.

Key specifications

Parameter	Value
Manufacturer	hongjiacheng
Package	SOT-23
Category	Diodes
Pins	3

Ordering variants

Same part, different packaging or reel option.

BAS70
BAS70R1
BAS70-04
BAS70-05
BAS70-06

CAD (KiCad official)

Symbol: BAS70
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: hongjiacheng datasheet (3 pp, sha256 0de8e09689f216a5, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF