行业组件数据 · 2026

发光二极管(用于光耦)/线圈(用于继电器)

LED for opto-isolators or coil for relays - key components enabling electrical isolation and switching in industrial control systems.

技术定义与适配语境
典型 发光二极管(用于光耦)/线圈(用于继电器) 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

In opto-isolators, the LED (Light Emitting Diode) converts electrical signals into light signals to provide electrical isolation between input and output circuits. In relays, the coil is an electromagnetic component that generates a magnetic field when energized, causing mechanical contacts to open or close for circuit switching. Both serve as the actuating elements in their respective isolation and switching devices.

组件规格

定义
In opto-isolators, the LED (Light Emitting Diode) converts electrical signals into light signals to provide electrical isolation between input and output circuits. In relays, the coil is an electromagnetic component that generates a magnetic field when energized, causing mechanical contacts to open or close for circuit switching. Both serve as the actuating elements in their respective isolation and switching devices.
工作原理
For opto-isolator LEDs: Electrical current flows through the LED, causing it to emit infrared or visible light. This light is detected by a phototransistor or photodiode on the isolated side, converting it back to an electrical signal. For relay coils: When voltage is applied, current flows through the coil windings, creating an electromagnetic field that attracts an armature, mechanically moving contacts to open or close circuits.
材料
LED: Gallium arsenide (GaAs) or gallium arsenide phosphide (GaAsP) semiconductor materials with aluminum-gallium-arsenide (AlGaAs) for infrared types. Coil: Copper or aluminum wire windings with enamel insulationwound around a ferromagnetic core (typically iron or ferrite).
Response Time
LED: <10μs, Coil: 5-20ms
Coil Resistance
50-5000Ω
Isolation Voltage
2500-5000Vrms
Coil Voltage Rating
5-240V DC/AC
LED Forward Current
10-50mA
LED Forward Voltage
1.2-2.2V
Operating Temperature
-40°C to +85°C
标准
ISO 9001IEC 60747-5UL 508DIN EN 61810

行业分类与别名

发光二极管(用于光耦)/线圈(用于继电器) 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Overvoltage or voltage spikes->LED burnout or coil insulation breakdown->Implement surge protection devices, use components with higher voltage ratings
Continuous operation at maximum current->Thermal degradation and reduced lifespan->Design with adequate cooling, implement duty cycle limitations
Mechanical vibration or shock->Coil winding damage or connection failure->Use vibration-resistant mounting, epoxy encapsulation

工业生态与工程逻辑

0
Coil overheating due to continuous energization
1
LED degradation over time reducing light output
2
Insulation breakdown in high-voltage applications
3
Contact welding in relays due to inrush currents

合规与检测

tolerance
LED forward voltage: ±0.2V, Coil resistance: ±10%, Isolation voltage: Tested at 150% of rated voltage for 1 minute
test method
IEC 60747-5 for opto-isolators, IEC 61810 for relays, including dielectric strength test, insulation resistance measurement, and operational life testing

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the main difference between LED in opto-isolators and coils in relays?

LEDs in opto-isolators use light for electrical isolation without physical contact, while relay coils use electromagnetic force to mechanically operate contacts for circuit switching.

Can LED opto-isolators and relay coils operate in high-temperature environments?

Yes, industrial-grade components typically operate from -40°C to +85°C, with some specialized versions rated up to +125°C for extreme conditions.

What maintenance is required for these components?

LEDs in opto-isolators require minimal maintenance as solid-state devices. Relay coils may require periodic inspection for insulation degradation and contact wear in high-cycle applications.

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CNFX Industrial Component Index · 电气设备制造

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