HX811RDB4RG from HANSCHIP semiconductor, in a SOT-143. 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	GND	power_in	Ground / negative supply return (电源负极端). Connect to system ground.
2	VRESET	output	Reset output (复位输出端). Open push-pull output that is driven LOW when VCC < Vth (2.63 V typ for the 'R' option) or when MR is low, and released HIGH after the Trp reset delay (typ 500 ms). VOL ≤ 0.5 V at ISINK = 3.2 mA; VOH ≥ 0.8·VCC at ISOURCE = 500 µA.
3	MR	input	Manual reset / enable input (使能控制端), active-low. Driving MR low forces VRESET low; releasing MR high starts the Trp reset-delay timer. VIH ≥ 0.7·VCC, VIL ≤ 0.2·VCC; minimum pulse width tMR = 10 µs; input pull-current IMR up to 25 µA at VCC = 6 V.
4	VCC	power_in	Positive supply input (电源正极端) and monitored rail. Operating range 1.0 V to 6.0 V; absolute maximum 6.5 V. Quiescent current ICCH ≈ 1 µA typ (5 µA max) when MR = VCC; standby ICCL up to 32 µA when MR = GND.

Key specifications

Parameter	Value
Manufacturer	HANSCHIP semiconductor
Package	SOT-143
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

HX811RDB4RG

CAD (KiCad official)

Symbol: HX811RDB4RG
Footprint: Package_TO_SOT_SMD:SOT-143
3D model: SOT-143 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`hx811rdb4rg.step`	75 KB	You want the bare part, or you mark your own boards.
`hx811rdb4rg-etched.step`	2.0 MB	You want the part with `HX811RDB4RG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 500 faces against 87 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: HANSCHIP semiconductor datasheet (7 pp, sha256 9e8fa2884ee6b7fc, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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