# CY4N35

**OCIC** · Transistor Output Optocoupler · DIP-6

CY4N35 from OCIC, in a DIP-6. 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 GaAs LED input; forward current max 60 mA, forward voltage 1.2 V typ to 1.5 V max at IF=10 mA. |
| 2 | CATHODE | passive | Cathode of the infrared LED input; reverse voltage max 6 V. |
| 3 | N/C | unconnected | No internal connection. |
| 4 | EMITTER | passive | Emitter of the output phototransistor; emitter-collector voltage max 7 V. |
| 5 | COLLECTOR | passive | Collector of the output phototransistor; collector-emitter voltage max 30 V and collector-base voltage max 70 V. |
| 6 | BASE | passive | Base of the output phototransistor; collector-base voltage max 70 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | OCIC |
| Package | DIP-6 |
| Category | Optocoupler |
| Pins | 6 |

## 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 |  |  | 60 | mA | Ta=25C | 1 |
| Reverse voltage | VR |  |  | 6 | V | Ta=25C | 1 |
| Peak forward current | IF(pk) |  |  | 3 | A | 300 µs, 2% duty cycle | 1 |
| Input power dissipation | PD |  |  | 120 | mW | Ta=25C; derate 1.14 mW/°C above 25°C | 1 |
| Output power dissipation | PC |  |  | 150 | mW | Ta=25C; derate 1.76 mW/°C above 25°C | 1 |
| Collector-emitter voltage | VCEO |  |  | 30 | V | Ta=25C | 1 |
| Collector-base voltage | VCBO |  |  | 70 | V | Ta=25C | 1 |
| Emitter-collector voltage | VECO |  |  | 7 | V | Ta=25C | 1 |
| Total power dissipation | Ptot |  |  | 270 | mW | Ta=25C; derate 2.94 mW/°C above 25°C | 1 |
| Operating temperature | Topr | -40 |  | 100 | °C |  | 1 |
| Storage temperature | Tstg | -40 |  | 125 | °C |  | 1 |
| Junction temperature | TJ | -40 |  | 125 | °C |  | 1 |
| Soldering temperature | Tsol |  |  | 260 | °C | 10 seconds | 1 |
| Forward voltage | VF |  | 1.2 | 1.5 | V | IF=10mA | 2 |
| Reverse current | IR |  |  | 10 | µA | VR=6V | 2 |
| Collector dark current | ICEO |  |  | 50 | nA | VCE=10V | 2 |
| Base dark current | ICBO |  |  | 20 | nA | VCE=10V | 2 |
| Collector-emitter breakdown voltage | BVCEO | 30 |  |  | V | IC=0.1mA, IF=0 | 2 |
| Collector-base breakdown voltage | BVCBO | 70 |  |  | V | IC=0.1mA, IF=0 | 2 |
| Emitter-collector breakdown voltage | BVECO | 7 |  |  | V | IE=100µA, IF=0 | 2 |
| Current transfer ratio | CTR | 100 |  |  | % | IF=10mA, VCE=10V | 2 |
| Current transfer ratio at low temperature | CTR | 40 |  |  | % | IF=10mA, VCE=10V, TA=-55°C | 2 |
| Current transfer ratio at high temperature | CTR | 40 |  |  | % | IF=10mA, VCE=10V, TA=+100°C | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 0.3 | V | IF=10mA, IC=0.5mA | 2 |
| Isolation voltage | VISO | 4170 |  |  | VRMS | t=1 Minute | 2 |
| Isolation capacitance | CISO |  | 0.2 |  | pF | VI-O=0V, f=1MHz | 2 |
| Collector-emitter capacitance | CCE |  | 8 |  | pF | VCE=0, f=1MHz | 2 |
| Turn-on time | TON |  | 2 | 10 | µs | VCE=10V, IC=2mA, RL=100Ω | 2 |
| Turn-off time | TOFF |  | 2 | 10 | µs | VCE=10V, IC=2mA, RL=100Ω | 2 |

## CAD (KiCad official)

- Symbol: `CY4N35`
- Footprint: `Package_DIP:DIP-6_W7.62mm`
- 3D model: DIP-6 (KiCad packages3D, STEP)
- 3D model files: `cy4n35-etched.step` / `cy4n35-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cy4n35.step` / `cy4n35.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [OCIC datasheet](docs/cy4n35-datasheet.pdf) (7 pp, sha256 `012c4b84b238348f`, retrieved 2026-11-02, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/cy4n35-datasheet.pdf)