RS2103XH from Jiangsu RUNIC Tech, in a SOT-23-6. 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	IN	input	Digital control input, TTL/CMOS compatible. Selects switch state: logic 0 turns NO OFF and NC ON; logic 1 turns NO ON and NC OFF. V_IH ≥ 1.5 V @ 5 V (1.3 V @ 3.3 V); V_IL ≤ 0.6 V @ 5 V (0.5 V @ 3.3 V). Input leakage ≤ 1 µA. Must not be left floating.
2	V+	power_in	Positive power supply, 1.8 V to 5.5 V. Absolute max V+ to GND is -0.3 V to 7.0 V. Supply current ≤ 1 µA. Bypass to GND with a local decoupling capacitor.
3	GND	power_in	Device ground / negative supply reference. All analog and digital signals are referenced to this pin.
4	NC	passive	Normally-Closed switch terminal (analog signal). Connected to COM when IN = 0. Signal range 0 V to V+, R_ON ≈ 0.6 Ω (typ) at 5 V, continuous current ±500 mA (peak ±800 mA). Bidirectional analog/digital signal path.
5	COM	passive	Common (pole) terminal of the SPDT switch. Routed to NC when IN = 0 and to NO when IN = 1. Signal range 0 V to V+, R_ON ≈ 0.6 Ω (typ), ±500 mA continuous.
6	NO	passive	Normally-Open switch terminal (analog signal). Connected to COM when IN = 1. Signal range 0 V to V+, R_ON ≈ 0.6 Ω (typ), ±500 mA continuous. Bidirectional analog/digital signal path.

Key specifications

Parameter	Value
Manufacturer	Jiangsu RUNIC Tech
Package	SOT-23-6
Category	Interface
Pins	6

Ordering variants

Same part, different packaging or reel option.

RS2103XH
RS2103XC6
RS2103XM

CAD (KiCad official)

Symbol: RS2103XH
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`rs2103xh.step`	97 KB	You want the bare part, or you mark your own boards.
`rs2103xh-etched.step`	1.8 MB	You want the part with `RS2103XH` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 445 faces against 117 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Jiangsu RUNIC Tech datasheet (12 pp, sha256 0a7943196ac72aaf, 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