ACS711ELCTR-12AB-T from Allegro MicroSystems LLC, in a SOP-8. 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	IP+	passive	Terminal for current being sensed (positive side of the internal copper conduction path). Pins 1 and 2 are fused internally and must be tied together on the PCB. Working voltage between the IP+/IP- side and IC side is rated to 100 VAC peak or VDC (basic isolation).
2	IP+	passive	Terminal for current being sensed (positive side of the internal copper conduction path). Fused internally with pin 1; tie both externally to carry the primary current.
3	IP-	passive	Terminal for current being sensed (negative/return side of the internal copper conduction path). Fused internally with pin 4; tie both externally. Primary conductor resistance is ~1.2 mΩ for the LC package.
4	IP-	passive	Terminal for current being sensed (negative/return side of the internal copper conduction path). Fused internally with pin 3; tie both externally.
5	GND	power_in	Signal ground terminal for the IC (isolated from the IP+/IP- current path).
6	FAULT	output	Overcurrent fault output, active low, open-drain style requiring an external pull-up (RPU ≥ 1 kΩ, typ. to VCC). Trips and latches when
7	VIOUT	output	Analog output voltage, ratiometric to VCC, with positive slope proportional to current flowing from IP+ to IP-. Quiescent output is VCC/2 at IP=0 A; sensitivity is 110 mV/A (typ) for the 12AB variant. Drives up to CLOAD=1 nF with RLOAD ≥ 15 kΩ.
8	VCC	power_in	Device power supply terminal. Operates from 3 to 5.5 V single supply (3.3 V nominal); ICC ~4 mA typ, 5.5 mA max. Bypass with 0.1 µF (CBYP) to GND close to the pin.

Key specifications

Parameter	Value
Manufacturer	Allegro MicroSystems LLC
Package	SOP-8
Category	Sensor
Pins	8

Ordering variants

ACS711ELCTR-12AB-T
ACS711ELCTR-12AB-TKLCTR-12AB-T
ACS711ELCTR-12AB-TELCTR-25AB-T
ACS711ELCTR-12AB-TKLCTR-25AB-T
ACS711ELCTR-12AB-TEEXLT-31AB-T
ACS711ELCTR-12AB-TKEXLT-31AB-T
ACS711ELCTR-12AB-TEEXLT-15AB-T
ACS711ELCTR-12AB-TKEXLT-15AB-T

CAD (KiCad official)

Symbol: ACS711ELCTR-12AB-T
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`acs711elctr-12ab-t.step`	122 KB	You want the bare part, or you mark your own boards.
`acs711elctr-12ab-t-etched.step`	2.6 MB	You want the part with `ACS711ELCTR-12AB-T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 664 faces against 147 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: Allegro MicroSystems LLC datasheet (18 pp, sha256 6fb6310c420b9503, 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