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Pinout
Key specifications
CAD (KiCad official)
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RPI-441C1

ROHM · Photointerrupters - Slot Type - Transistor Output · DIP-4

RPI-441C1 from ROHM, 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	passive	Anode of the internal infrared LED emitter. Drive with forward current IF (typ. 20 mA, max. 50 mA) through a current-limiting resistor; VF = 1.3 V typ, 1.6 V max at IF = 50 mA. Reverse voltage VR must not exceed 5 V.
2	Cathode	passive	Cathode of the internal infrared LED emitter. Sinks the LED forward current to the return rail. LED power dissipation PD = 80 mW max.
3	Collector	passive	Collector of the internal silicon NPN phototransistor. Typically pulled up to VCC through a load resistor; VCEO max = 30 V, IC max = 30 mA, collector power dissipation PC = 80 mW max. On-state IC = 0.55 mA typ (IF = 20 mA, VCE = 5 V); VCE(sat) ≤ 0.4 V.
4	Emitter	passive	Emitter of the internal silicon NPN phototransistor. Normally tied to GND. Reverse emitter-collector voltage VECO must not exceed 4.5 V. Dark current ICEO ≤ 0.5 µA at VCE = 10 V.

Key specifications

Parameter	Value
Manufacturer	ROHM
Package	DIP-4
Category	Sensor
Pins	4

CAD (KiCad official)

Symbol: RPI-441C1
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: ROHM datasheet (6 pp, sha256 02c7758798e8bd75, retrieved 2026-08-17, tier: manufacturer)
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).