HOT 
EL357
EVERLIGHT
Part number
Yes. EL357 by EVERLIGHT is available for RFQ. Submit your required quantity and our team will confirm real-time stock, lead time, and volume pricing.
Pricing for EL357 can vary by order quantity, market availability, date code, packaging, and delivery destination. Request a quote to receive the latest volume pricing.
EL357 is a EVERLIGHT Optocouplers / Photocouplers with Maximum Collector Emitter Saturation Voltage:: 200 mV and Maximum Collector Emitter Voltage:: 80 V. Review the product details or submit an RFQ if you need confirmation before purchase.
Our sales team usually responds within 24 hours after receiving your RFQ. The quote may include stock status, unit price, lead time, shipping options, and available alternatives.
If stock is confirmed, in-stock parts can usually ship within 1–2 business days. Final lead time depends on quantity, stock source, and delivery destination.
Yes. If EL357 is unavailable, obsolete, or does not meet your required lead time, we can help check similar EVERLIGHT Optocouplers / Photocouplers parts or compatible alternatives.
Looking for Pricing? Contact us for volume pricing.
Fast Dispatch: Ships in 5-7 days(in-stock parts within 1-2 days)
Unishop Global Export: 1-7 days, $40.00
Guaranteed Delivery: Door-to-door in 30 days
Compliant Worldwide Shipping: DHL, FedEx, SF, and UPS.
IMPORTANT NOTICE
Quotations are subject to stock availability and may vary with market conditions. Prices and lead times are not guaranteed until a purchase order is confirmed. Ensure your contact details are correct to avoid delays in response.
The Everlight Electronics EL357 is a 4-pin SOP phototransistor optocoupler designed to provide electrical isolation and signal transmission between circuits with different voltage potentials. It integrates an infrared light-emitting diode (LED) input stage and a phototransistor output stage inside a compact surface-mount package.
The EL357 series provides high isolation voltage, stable current transfer characteristics, and reliable switching performance, making it suitable for industrial control systems, power supplies, communication equipment, measurement instruments, and consumer electronics requiring signal isolation.
With a compact SOP-4 package, RoHS-compliant construction, and multiple CTR (Current Transfer Ratio) options, the EL357 is widely used as a cost-effective alternative to traditional optocouplers such as PC817 series devices in general-purpose isolation applications.
EL357
| Segment | Description |
|---|---|
| EL | Everlight Electronics optoelectronic product family |
| 357 | Phototransistor optocoupler series |
Key parameters:
| Feature | Description |
|---|---|
| Device Type | Phototransistor Optocoupler |
| Input | Infrared LED |
| Output | Phototransistor |
| Isolation Voltage | 3750Vrms |
| Package | SOP-4 |
| Application | Signal Isolation |
| Advantage | Description |
|---|---|
| High Isolation Capability | Provides 3750Vrms isolation for safe signal transmission |
| Cost-Effective Design | Provides reliable isolation at competitive cost |
| Compact Package | SOP-4 package supports space-saving PCB designs |
| Wide CTR Options | Multiple CTR grades enable flexible circuit design |
| High Compatibility | Common replacement option for general-purpose optocouplers |
| Safety Certification | Supports UL and VDE safety requirements |
| Reliable Performance | Suitable for industrial and consumer applications |
| Mature Technology | Based on proven optocoupler architecture |
| Manufacturer | Product Family | Positioning |
|---|---|---|
| Everlight | EL357 Series | General-purpose SOP-4 phototransistor optocoupler |
| Sharp | PC817 Series | Widely used low-cost isolation optocoupler |
| Toshiba | TLP181 Series | Compact transistor-output optocoupler |
| Vishay | VOS617 Series | Industrial signal isolation optocoupler |
The Everlight EL357 is positioned as a reliable and economical phototransistor optocoupler solution for engineers requiring electrical isolation, compact packaging, and stable signal transmission performance in industrial, power, and consumer electronics applications.
The EL357 provides 3750Vrms electrical isolation between the input LED and output phototransistor, allowing safe signal transmission between circuits operating at different voltage levels.
Advantages:
Typical applications:
The EL357 uses an infrared LED coupled with a phototransistor output stage, providing a simple and reliable method for electrical signal isolation.
Advantages:
Typical applications:
The EL357 series supports multiple current transfer ratio grades ranging from 50% to 600%, allowing designers to select suitable versions according to system requirements.
Advantages:
Typical applications:
The EL357 is available in a small 4-pin SOP package, suitable for automated PCB assembly and compact electronic designs.
Advantages:
The EL357 provides stable switching characteristics for low-frequency signal transmission and control applications.
Advantages:
The EL357 series supports safety certifications including UL and VDE approvals, improving suitability for applications requiring electrical isolation compliance.
Advantages:
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