AT817C-FeH-DE from AOTE, in a DIP-4. 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	Anode	input	LED anode of the input-side GaAs infrared emitter. Drive with forward current IF (max 50 mA DC, 1000 mA pulsed 1 us); typical VF ~1.2 V at IF=20 mA. Use a series current-limiting resistor.
2	Cathode	input	LED cathode of the input-side infrared emitter. Reverse voltage rated to VR=6 V max. Return path for the LED drive current.
3	Emitter	output	Emitter of the output-side NPN silicon phototransistor. Typically tied to the output-side ground/reference. VECO breakdown 6 V max.
4	Collector	output	Collector of the output-side NPN phototransistor. Sinks collector current IC (max 50 mA) modulated by the LED photocurrent. BVCEO >= 80 V; VCE(sat) typ 0.1 V (max 0.2 V) at IF=20 mA, IC=1 mA.

Key specifications

Parameter	Value
Manufacturer	AOTE
Package	DIP-4
Category	Optoisolators
Pins	4

Ordering variants

Same part, different packaging or reel option.

AT817C-FeH-DE-CuH-D
AT817C-FeH-DE
AT817C-FeH-DE-CuH-DE
AT817C-FeH-DE-CuH-S
AT817C-FeH-S
AT817C-FeH-DE-CuH-M
AT817C-FeH-M

CAD (KiCad official)

Symbol: AT817C-FeH-DE
Footprint: Package_DIP:DIP-4_W7.62mm
3D model: DIP-4 (KiCad packages3D, STEP)

Provenance

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

Datasheet: AOTE datasheet (12 pp, sha256 6b8be713aab0a028, 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