EL3083

EL3083 is an optocoupler (optical isolator) from Everlight. It provides galvanic isolation between input and output using a LED on the input side and a phototransistor on the output side in a 4-pin package. The LED side is driven with a current-limited input; light triggers the transistor, isolating grounds and allowing safe signal transfer from a low-voltage control side to a high-voltage or noisy side. Typical pinout (DIP-4): pins 1–2 LED anode/cathode; pins 3–4 transistor emitter/collector. The output side usually requires a pull-up resistor and can switch loads up to a few tens of milliamps. Applications: isolating microcontroller signals from high-voltage circuits, isolated sensors, power-supply control, motor controllers, and any place you need galvanic isolation. Advantages: protects circuits from voltage spikes, reduces ground loops, simple interface. Limitations: CTR varies with temperature/aging; limited speed and output current; ensure CTR and isolation ratings meet your needs by checking the datasheet. Not a high-speed device; choose based on IF, CTR, and isolation voltage.

EL3083 is a single-channel optocoupler (Everlight). Key features:
- 1-channel, LED input with phototransistor output (NPN)
- DIP-4 package (lead spacing 2.54 mm; standard through-hole)
- Optical isolation between input and output: up to about 5 kV RMS
- Current Transfer Ratio (CTR): typically 50–600% at IF ≈ 5 mA (varies with temperature and device)
- Input LED forward current (IF) max ≈ 60 mA
- Output suitable for logic-level/signal isolation with low saturation
- Operating temperature: commonly -40 to +85 °C
- Applications: MCU/signal isolation, data coupling, power-supply regulation, digital isolation networks.

EL3083 is a phototransistor-output optocoupler packaged in an 8-pin DIP (through‑hole) package.

EL3083 is a 4-pin optocoupler (photocoupler). It has:
- Input: pins 1 (anode) and 2 (cathode) for the LED
- Output: pins 3 (emitter) and 4 (collector) for the phototransistor
It provides electrical isolation between input and output.

- Manufacturer: Everlight Electronics Co., Ltd. (Everlight)
- Kind of company: A Taiwan-based multinational electronics manufacturer that designs and produces optoelectronic components, including LEDs, displays, and optocouplers (optical isolators).

Application areas of EL3083:
- Galvanic isolation between low-voltage logic and high-voltage/high-current circuits
- Signal coupling and level shifting for microcontrollers and digital ICs
- Isolated feedback in switch-mode power supplies and isolated DC-DC converters
- Interfacing sensors, switches, and actuators in industrial automation
- Noise immunity and ground-loop protection
- Use in safety-critical medical/industrial equipment
- Driving small transistors or relays via the phototransistor output with proper bias

EL3083 is a phototransistor optocoupler. Common cross‑references (transistor-output optocouplers) include:
- Sharp PC817
- Lite-On LTV‑817 (LTV‑817A)
- Fairchild/Vishay 4N25, 4N35
- Vishay ILD213/ILD214
- Everlight EL817
Note: CTR and speed vary by part; verify datasheets for current transfer ratio, speed, and pinout when replacing.