component
4N25M
Public Made by Adomby adom
onsemi Transistor, Photovoltaic Output Optoisolators, DIP-6. 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
markdown4N25M
onsemi · Transistor, Photovoltaic Output Optoisolators · DIP-6
4N25M from onsemi, 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 gallium arsenide infrared emitting diode (LED input side), which is driven to control the phototransistor output. |
| 2 | CATHODE | passive | Cathode of the gallium arsenide infrared emitting diode (LED input side), completing the LED drive path between pins 1 and 2. |
| 3 | NC | unconnected | No connection; this pin is not internally connected and is left unused in the package. |
| 4 | EMITTER | passive | Emitter of the silicon phototransistor output, which conducts in response to light from the internal LED. |
| 5 | COLLECTOR | passive | Collector of the silicon phototransistor output, pulled toward the supply through the external load to produce the output signal. |
| 6 | BASE | passive | Base of the phototransistor, which may be left open for light-only operation or biased through an external resistor to set sensitivity and speed. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | DIP-6 |
| Category | Optoisolators |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
4N25M - Footprint:
Package_DIP:DIP-6_W7.62mm - 3D model: DIP-6 (KiCad packages3D, STEP)
- 3D model files:
4n25m-etched.step/4n25m-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);4n25m.step/4n25m.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (13 pp, sha256
dc8d7bad2bb14e07, retrieved 2026-10-09, 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).