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Generated by kicad-footprint-generator · KiCad file format 20260206

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K10101C

Cosmo Electronics · Transistor, Photovoltaic Output Optoisolators · DIP-4

K10101C from Cosmo Electronics, in a DIP-4. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	Anode	passive	Anode of the infrared emitting diode; the input forward current IF is rated at 50 mA max, peak forward current IFM at 1 A max, and reverse voltage VR at 6 V max.
2	Cathode	passive	Cathode of the infrared emitting diode; the same input ratings apply (IF 50 mA max, IFM 1 A max, VR 6 V max).
3	Emitter	passive	Emitter of the phototransistor detector; the emitter-collector voltage VECO is rated at 6 V max.
4	Collector	passive	Collector of the phototransistor detector; the collector-emitter voltage VCEO is rated at 80 V max and the collector current IC at 50 mA max.

Key specifications

Parameter	Value
Manufacturer	Cosmo Electronics
Package	DIP-4
Category	Optoisolators
Pins	4

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Current transfer ratio, rank C (classification table)	CTR	200		400	%		4
Current transfer ratio	CTR	15			%	IF=1mA, VCE=5V	3
Operating temperature	Topr	-55		115	℃		3
Storage temperature	Tstg	-55		125	℃		3
Forward voltage	VF		1.2	1.4	V	IF=20mA	3
Peak forward voltage	VFM			3	V	IFM=0.5A	3
Reverse current	IR			10	μA	VR=4V	3
Collector dark current	ICEO			0.1	μA	VCE=20V, IF=0	3
Collector-emitter saturation voltage	VCE(sat)		0.1	0.2	V	IF=20mA, IC=1mA	3
Floating capacitance	Cf		0.6	1	pF	V=0, f=1MHz	3
Response time (Rise)	tr		4	18	μs	VCE=2V, IC=2mA, RL=100Ω	3
Response time (Fall)	tf		3	18	μs	VCE=2V, IC=2mA, RL=100Ω	3
Forward current	IF			50	mA	Ta=25℃	3
Peak forward current	IFM			1	A	Ta=25℃	3
Reverse voltage	VR			6	V	Ta=25℃	3
Power dissipation	PD			70	mW	Ta=25℃	3
Collector-emitter voltage	VCEO			80	V	Ta=25℃	3
Emitter-collector voltage	VECO			6	V	Ta=25℃	3
Collector current	IC			50	mA	Ta=25℃	3
Collector power dissipation	PC			150	mW	Ta=25℃	3
Total power dissipation	Ptot			200	mW	Ta=25℃	3
Isolation voltage	Viso			5000	Vrms	1 minute	3
Soldering temperature	Tsol			260	℃	10 seconds	3

CAD (KiCad official)

Symbol: K10101C
Footprint: Package_DIP:DIP-4_W7.62mm
3D model: DIP-4 (KiCad packages3D, STEP)
3D model files: k10101c-etched.step / k10101c-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); k10101c.step / k10101c.glb are the bare package body.

Provenance

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

Datasheet: Cosmo Electronics datasheet (11 pp, sha256 f9353fab22ed40cc, retrieved 2026-10-16, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF