component
KPC357NT0CTLD
Public Made by Adomby adom
Cosmo Electronics Transistor, Photovoltaic Output Optoisolators, SOP-4-2.54mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownKPC357NT0CTLD
Cosmo Electronics · Transistor, Photovoltaic Output Optoisolators · SOP-4-2.54mm
KPC357NT0CTLD from Cosmo Electronics, in a SOP-4-2.54mm. 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 input light-emitting diode; the input is rated for a reverse voltage of 6 V and a forward current of 50 mA. |
| 2 | Cathode | passive | Cathode of the input light-emitting diode; the input side is rated for a peak forward current of 1 A and a power dissipation of 70 mW. |
| 3 | Emitter | passive | Emitter of the output phototransistor; the output is rated for a collector-emitter voltage of 80 V and an emitter-collector voltage of 5 V. |
| 4 | Collector | passive | Collector of the output phototransistor; the collector current is rated at 50 mA and the collector power dissipation at 150 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Cosmo Electronics |
| Package | SOP-4-2.54mm |
| 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 |
|---|---|---|---|---|---|---|---|
| Forward current | IF | 50 | mA | 3 | |||
| Peak forward current | IFM | 1 | A | 3 | |||
| Reverse voltage | VR | 6 | V | 3 | |||
| Power dissipation | PD | 70 | mW | 3 | |||
| Collector-Emitter voltage | VCEO | 80 | V | 3 | |||
| Emitter-Collector voltage | VECO | 5 | V | 3 | |||
| Collector current | IC | 50 | mA | 3 | |||
| Collector power dissipation | PC | 150 | mW | 3 | |||
| Total power dissipation | Ptot | 170 | mW | 3 | |||
| Isolation voltage 1 minute | Viso | 3750 | Vrms | 3 | |||
| Operating temperature | Topr | -55 | 115 | ℃ | 3 | ||
| Storage temperature | Tstg | -55 | 125 | ℃ | 3 | ||
| Soldering temperature 10 seconds | Tsol | 260 | ℃ | 10 seconds | 3 | ||
| Current transfer ratio (rank C) | CTR | 200 | 400 | % | IF=5mA, VCE=5V | 4 | |
| Current transfer ratio | CTR | 15 | % | IF=1mA, VCE=5V | 3 | ||
| Reverse current | IR | 10 | uA | VR=4V | 3 | ||
| Collector dark current | ICEO | 0.1 | uA | VCE=20V, IF=0 | 3 | ||
| Collector-Emitter breakdown voltage | BVCEO | 80 | V | Ic=100uA , IF=0 | 3 | ||
| Emitter-Collector breakdown voltage | BVECO | 5 | V | IE=100uA, IF=0 | 3 | ||
| Collector-Emitter saturation voltage | VCE(sat) | 0.1 | 0.3 | V | IF=20mA, Ic=1mA | 3 | |
| Floating capacitance | Cf | 0.6 | 1 | pF | V=0, f=1MHZ | 3 | |
| Forward voltage | VF | 1.2 | 1.4 | V | IF=20mA | 3 | |
| Terminal capacitance | Ct | 30 | 250 | pF | V=0, f=1KHZ | 3 | |
| Response time (Rise) | tr | 5 | 20 | us | Vce=2V,Ic=2mA,RL=100Ω | 3 | |
| Response time (Fall) | tf | 4 | 20 | us | 3 |
CAD (KiCad official)
- Symbol:
KPC357NT0CTLD - Footprint:
Package_SO:SOP-4_3.8x4.1mm_P2.54mm - 3D model: SOP-4-2.54mm (KiCad packages3D, STEP)
- 3D model files:
kpc357nt0ctld-etched.step/kpc357nt0ctld-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);kpc357nt0ctld.step/kpc357nt0ctld.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Cosmo Electronics datasheet (10 pp, sha256
5fe7e7c0b7771dd4, retrieved 2026-10-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).