4N25 80V Photovoltaic Output Optoisolator (Manufacturer : EVERLIGHT Electronics )

Description

4N25 80V Photovoltaic Output Optoisolator (Manufacturer : EVERLIGHT Electronics ) The 4N25 is a single-channel optoisolator that employs an infrared LED paired with a silicon phototransistor to transfer electrical signals while providing galvanic isolation. In this device, the LED emits photons when driven by an input current; these photons traverse an internal gap and strike the base emitter region of the phototransistor, producing a proportional collector current. This optical coupling ensures that high-voltage or noisy input circuits remain electrically separated from sensitive output circuitry, enhancing system reliability and safety. Packaged in a compact 6-pin dual-in-line (DIP) format, the 4N25 features wide lead spacing for improved creepage distance and is also offered in surface-mount variants for high-density layouts. Internally, pins 1–2 connect to the infrared LED anode and cathode, while pins 4–5 serve as the emitter and collector of the output phototransistor (pin 6 is the base, typically left open). When an input current of up to 60 mA flows through the LED, the phototransistor switches on, allowing currents up to the device’s maximum collector-emitter rating of 80 V to pass. Designed for harsh environments, the 4N25 withstands repetitive isolation tests at 5 kV rms and operates across –55 °C to +110 °C. Its robust construction meets UL, VDE, CSA, and multiple international approvals, making it ideal for industrial power-supply regulators, digital logic interfaces, and microprocessor signal isolation. Features: Available in standard and surface-mount 6-pin DIP packages (4N25, 4N26, 4N27, 4N28 series). High isolation voltage: 5 000 V rms. Creepage distance > 7.62 mm. Operating temperature range: –55 °C to +110 °C. Compact dual-in-line package; surface-mount options available. Pb-free and RoHS compliant. Specifications: Parameter Symbol Rating Unit Forward current: IF 60 mA Peak forward current (t = 10 µs): IFM 1 A Reverse voltage: VR 6 V LED power dissipation (TA = 25 °C): PD 100 mW Collector–Emitter voltage: VCEO 80 V Collector–Base voltage: VCBO 80 V Emitter–Collector voltage: VECO 7 V Emitter–Base voltage: VEBO 7 V Output power dissipation (TA = 25 °C): PC 150 mW Total power dissipation: PTOT 200 mW Isolation voltage (AC, 1 min, 40–60% RH): VISO 5 000 V rms Operating temperature: TOPR –55 to +110 °C Storage temperature: TSTG –55 to +125 °C Soldering temperature (10 s max): TSOL 260 °C Applications: Power supply regulators. Digital logic inputs. Microprocessor inputs. Package Contents: 1x 4N25 80V Photovoltaic Output Optoisolator (Manufacturer : EVERLIGHT Electronics ) Data sheet

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