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規格
| 屬性 | 價值 |
| Manufacturer | AOTE |
| Package / Case | DIP-4 |
| Input voltage type | DC |
| Output Type | Phototransistor |
| Number of Outputs | 1 |
| Reverse Voltage | 6V |
| Load Voltage | 80V |
| Current - Output | 50mA |
| Operating Temperature | -55℃~+110℃ |
| Voltage - Forward(Vf) | 1.2V |
| Isolation Voltage(Vrms) | 5kV |
| Rise time | 4us |
| Fall time | 3us |
| Current Transfer Ratio (CTR) Minimum | 80% |
| Current Transfer Ratio (CTR) Maximum / Saturation Value | 600% |
| Vce Saturation(VCE(sat)) | 0.1V@20mA,1mA |
概述
Description
The EL817C is a photocoupler (optoisolator) designed for signal isolation between circuits. It features an infrared LED paired with a phototransistor, providing electrical isolation up to 5kV RMS.
Key Specifications:
- Isolation Voltage: 5kV RMS
- Current Transfer Ratio (CTR): 50-600% (varies by model)
- Input Forward Current (IF): 60mA max
- Output Collector-Emitter Voltage (VCEO): 35V
- Switching Speed: ~4μs (turn-on/off)
Applications:
- Signal isolation in power supplies, PLCs, and industrial controls
- Noise suppression in digital/analog circuits
- Microcontroller interfacing
Package: Typically in a 4-pin DIP (Dual In-line Package).
The EL817C ensures safe, noise-free signal transmission while preventing ground loops and voltage spikes. Always check datasheet specifics for your variant.
Key Specifications:
- Isolation Voltage: 5kV RMS
- Current Transfer Ratio (CTR): 50-600% (varies by model)
- Input Forward Current (IF): 60mA max
- Output Collector-Emitter Voltage (VCEO): 35V
- Switching Speed: ~4μs (turn-on/off)
Applications:
- Signal isolation in power supplies, PLCs, and industrial controls
- Noise suppression in digital/analog circuits
- Microcontroller interfacing
Package: Typically in a 4-pin DIP (Dual In-line Package).
The EL817C ensures safe, noise-free signal transmission while preventing ground loops and voltage spikes. Always check datasheet specifics for your variant.
Equivalent
The EL817C is an optocoupler with a phototransistor output. Equivalent alternatives include:
- PC817 (Sharp)
- LTV817 (Lite-On)
- TLP621 (Toshiba)
- CNY17 (Vishay)
- H11AA1 (Fairchild/ON Semi)
These offer similar specs (CTR ~50-600%, Vceo 35V). Verify pinout and parameters for exact compatibility.
- PC817 (Sharp)
- LTV817 (Lite-On)
- TLP621 (Toshiba)
- CNY17 (Vishay)
- H11AA1 (Fairchild/ON Semi)
These offer similar specs (CTR ~50-600%, Vceo 35V). Verify pinout and parameters for exact compatibility.
Pinout
The EL817C is a 4-pin optocoupler (phototransistor type) with the following pin functions:
1. Anode (Pin 1) – LED positive input.
2. Cathode (Pin 2) – LED negative input.
3. Emitter (Pin 3) – Phototransistor emitter (output ground).
4. Collector (Pin 4) – Phototransistor collector (output signal).
It provides electrical isolation between input and output, commonly used for signal transmission in circuits requiring noise immunity. The current transfer ratio (CTR) varies by model.
1. Anode (Pin 1) – LED positive input.
2. Cathode (Pin 2) – LED negative input.
3. Emitter (Pin 3) – Phototransistor emitter (output ground).
4. Collector (Pin 4) – Phototransistor collector (output signal).
It provides electrical isolation between input and output, commonly used for signal transmission in circuits requiring noise immunity. The current transfer ratio (CTR) varies by model.
Application
The EL817C is a photocoupler (optoisolator) widely used for signal isolation and noise suppression in various applications. Key areas include:
1. Industrial Control – Isolating signals in PLCs, motor drives, and sensors.
2. Power Supplies – Feedback loop isolation in SMPS and inverters.
3. Medical Equipment – Ensuring patient safety by isolating sensitive circuits.
4. Telecommunications – Protecting communication interfaces from surges.
5. Automotive Electronics – Signal isolation in EV chargers and battery management.
6. Consumer Electronics – Isolating digital and analog circuits in appliances.
Its compact design, high isolation voltage (5kV), and reliable performance make it suitable for safety-critical and noise-prone environments.
1. Industrial Control – Isolating signals in PLCs, motor drives, and sensors.
2. Power Supplies – Feedback loop isolation in SMPS and inverters.
3. Medical Equipment – Ensuring patient safety by isolating sensitive circuits.
4. Telecommunications – Protecting communication interfaces from surges.
5. Automotive Electronics – Signal isolation in EV chargers and battery management.
6. Consumer Electronics – Isolating digital and analog circuits in appliances.
Its compact design, high isolation voltage (5kV), and reliable performance make it suitable for safety-critical and noise-prone environments.
Package
The EL817C is a photocoupler (optocoupler) available in a 4-pin DIP (Dual In-line Package). It features a compact, through-hole design with a standard 0.3-inch row spacing, making it suitable for PCB mounting. The package is typically molded in black plastic and includes an infrared LED and a phototransistor for isolation. Common variants may also include surface-mount options like SOP (Small Outline Package).
