component
CT785GR
Public Made by Adomby adom
CT Micro International Transistor, Photovoltaic Output Optoisolators, DIP-4. 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
markdownCT785GR
CT Micro International · Transistor, Photovoltaic Output Optoisolators · DIP-4
CT785GR from CT Micro International, 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 | input | Anode of the GaAs infrared-emitting diode; forward current IF is 60 mA max (1000 mA peak transient, ≤1µs, 300pps) with VF typically 1.2 V at IF=10 mA. |
| 2 | Cathode | input | Cathode of the infrared-emitting diode; reverse voltage VR is limited to 6 V max. |
| 3 | Emitter | passive | Phototransistor emitter; emitter-collector breakdown voltage BVECO is 7 V min. |
| 4 | Collector | passive | Phototransistor collector; collector current is 80 mA max and collector-emitter breakdown voltage BVCEO is 80 V min. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | CT Micro International |
| 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 |
|---|---|---|---|---|---|---|---|
| Isolation voltage | VISO | 5300 | VRMS | 2 | |||
| Total power dissipation | PTOT | 200 | mW | 2 | |||
| Operating temperature | TOPR | -55 | 125 | oC | 2 | ||
| Storage temperature | TSTG | -55 | 150 | oC | 2 | ||
| Soldering temperature | TSOL | 260 | oC | 2 | |||
| Forward current | IF | 60 | mA | 2 | |||
| Peak transient current | IF(TRANS) | 1000 | mA | ≤1μs P.W,300pps | 2 | ||
| Reverse voltage | VR | 6 | V | 2 | |||
| Emitter power dissipation | PD | 100 | mW | 2 | |||
| Detector power dissipation | PC | 150 | mW | 2 | |||
| Collector-Emitter Breakdown Voltage | BVCEO | 80 | V | 2 | |||
| Emitter-Collector Breakdown Voltage | BVECO | 7 | V | 2 | |||
| Collector Current | IC | 80 | mA | 2 | |||
| Forward voltage | VF | 1.2 | 1.3 | V | IF= 10mA | 3 | |
| Reverse Current | IR | 5 | µA | VR= 6V | 3 | ||
| Input Capacitance | CIN | 10 | 30 | pF | f= 1MHz | 3 | |
| Collector-Emitter Breakdown | BVCEO | 80 | V | IC= 100µA | 3 | ||
| Emitter-Collector Breakdown | BVECO | 7 | V | IEC= 100µA | 3 | ||
| Collector-Emitter Dark Current | ICEO | 100 | nA | VCE= 24V, IF= 0mA | 3 | ||
| Collector-Emitter Dark Current (Ta=85°C) | ICEO | 50 | uA | VCE= 24V, IF=0mA, Ta=85˚C | 3 | ||
| Current Transfer Ratio (CT785GR) | CTR | 100 | 300 | % | IF= 5mA, VCE= 5V | 3 | |
| Saturated CTR (CT785GR) | CTR(sat) | 30 | % | IF= 1mA, VCE= 0.4V | 3 | ||
| Collector-Emitter Saturation Voltage | VCE(SAT) | 0.2 | 0.4 | V | IF= 8mA, IC= 2.4mA | 3 | |
| Isolation Capacitance | CIO | 0.25 | 1 | pF | f= 1MHz | 3 | |
| Rise Time | tr | 16 | µs | IC= 2mA, VCE= 2V, RL= 100Ω | 4 | ||
| Fall Time | tf | 16 | µs | IC= 2mA, VCE= 2V, RL= 100Ω | 4 | ||
| Turn-on time | ton | 20 | µs | IC= 2mA, VCE= 2V, RL= 100Ω | 4 | ||
| Turn-off time | toff | 20 | µs | IC= 2mA, VCE= 2V, RL= 100Ω | 4 |
CAD (KiCad official)
- Symbol:
CT785GR - Footprint:
Package_DIP:DIP-4_W7.62mm - 3D model: DIP-4 (KiCad packages3D, STEP)
- 3D model files:
ct785gr-etched.step/ct785gr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ct785gr.step/ct785gr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: CT Micro International datasheet (14 pp, sha256
4d8d604a612b7423, retrieved 2026-10-16, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).