PS2561D-1Y-V-A from RENESAS, 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	Anode of the input GaAs infrared LED. Forward current IF is driven into this pin (typ. 5 mA, absolute max IF = 40 mA DC, IFP = 1 A peak). Forward voltage VF = 1.2 V typ. (1.4 V max) at IF = 10 mA; VR max = 6 V.
2	Cathode	input	Cathode of the input GaAs infrared LED. Return terminal for the LED forward current; combined with pin 1 forms the input side of the photocoupler.
3	Emitter	output	Emitter of the output NPN silicon phototransistor. VECO max = 7 V. Typically tied to the output-side ground/return in the isolated circuit.
4	Collector	output	Collector of the output NPN silicon phototransistor. VCEO max = 80 V, IC max = 50 mA, VCE(sat) = 0.3 V max at IF = 10 mA / IC = 2 mA. CTR = IC/IF = 50-400% (typ. 160%) at IF = 5 mA, VCE = 5 V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

PS2561D-1Y-A
PS2561D-1Y-V-A
PS2561DL-1Y-A
PS2561DL-1Y-V-A
PS2561DL-1Y-F3-A
PS2561DL-1Y-V-F3-A
PS2561DL1-1Y-A
PS2561DL1-1Y-V-A
PS2561DL2-1Y-A
PS2561DL2-1Y-V-A
PS2561DL2-1Y-F3-A
PS2561DL2-1Y-V-F3-A

CAD (KiCad official)

Symbol: PS2561D-1Y-V-A
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: RENESAS datasheet (None pp, sha256 04ff39dc9544e695, 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