Right-Angle Bent-Lead LED: Side-Emitting Indicator Structure & Customization Guide

发布于: 2026-08-12 09:39

设备结构设计中经常遇到这样的问题:PCB是水平安装的,但指示灯需要从机箱侧面出光。重新设计一块竖板成本太高,这时最常用的解法就是——把直插LED的引脚弯成90°,让灯珠本体"躺平"朝侧方发光。这就是弯脚LED灯珠(也称90°弯脚、侧弯脚LED)。

一、弯脚LED解决什么问题?

标准直插LED(F3/F5)垂直插在PCB上,光线朝上。当产品要求:

  • PCB平贴机箱底部,灯从侧壁开孔出光;
  • 灯珠需要探出PCB边缘,对准前面板开孔;
  • 多层板叠放,灯珠需要避让上层结构;

这些场景用90°弯脚LED一次成型,比加转接板、用侧发光贴片都便宜,且直插工艺波峰焊可靠性强。

二、弯脚成型的三个工艺要点

  • 弯脚位置:弯折点必须距胶体根部≥2mm,否则弯折应力会传导到封装内部,造成金线断线隐患。弘呈光电弯脚成型统一采用距胶体3mm标准弯折位。
  • 脚距与尺寸公差:弯脚后引脚间距、灯珠中心到安装面的高度直接决定能否对准面板孔,弘呈弯脚款尺寸公差控制在±0.1mm,支持按图纸定制任意弯脚角度(30°/45°/90°)与折弯尺寸。
  • 成型设备:手工弯脚一致性差,批量必须用模具一次成型,避免引脚根部裂纹和镀层损伤。

三、弯脚LED vs 侧发光贴片,怎么选?

对比项 90°弯脚直插LED 侧发光贴片LED
焊接工艺 波峰焊/手焊 回流焊
机械强度 高(通孔固定) 一般(靠焊盘)
出光高度 可按需定制(弯脚尺寸决定) 固定(贴板面)
单颗成本 略高
适用批量 小批量友好,无开模费 需要匹配PCB设计

四、定制弯脚LED要提供什么?

定制流程很简单:① 提供结构图纸或样品(标明弯折角度、各段尺寸、脚距);② 弘呈光电3天内出样;③ 装机确认后批量供货。F3、F5全颜色(含双色)均可弯脚定制,红绿双色弯脚款是工控面板的高频需求。

弘呈光电(HC-LED)F3/F5弯脚款常备标准90°现货,特殊角度与尺寸支持来图定制,样品申请3天发出。有侧发光结构需求的工程师,可直接带图纸联系我司工程团队评估。

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Frequently Asked Questions (FAQ)

1. Can I get free LED samples from Hongcheng Optoelectronics?

Yes. Dongguan Hongcheng Optoelectronics Co., Ltd. supports sample testing — you can verify electro-optical parameters, dimensions and soldering compatibility before placing bulk orders. To request samples, call +86 139 2571 4318 (WeChat same number) or email sales@led-hc.com with the model and quantity you need.

2. What is the minimum order quantity (MOQ)?

The MOQ for DIP (through-hole) LEDs is 1K (1,000 pcs); for SMD LEDs the MOQ is 3-5K, shipped in tape-and-reel packaging. The MOQ for customized models (special wavelength, brightness or voltage binning) is confirmed per custom solution. Please contact sales for an accurate quotation and MOQ for your model.

3. What are the lead times for samples and mass production?

Sample lead time is typically 3-4 working days; in-stock samples are usually shipped within 2 working days. Mass production lead time is typically 10-15 working days, confirmed according to order quantity and production schedule — please contact sales for an accurate lead time.

4. Are the products RoHS certified?

Yes. All Hongcheng LED diodes are RoHS and CE certified, made with A-grade chips, 99.9% pure gold wire bonding and high-temperature resistant encapsulant — anti-sulfuration and low light decay, meeting the environmental and reliability requirements of home appliance, automotive and industrial equipment applications.

5. Can voltage, wavelength, brightness or color be customized?

Yes. We support binning and customization of brightness, wavelength, voltage and color, and provide OEM services. Our product range covers 0201-5730 SMD LEDs, addressable RGB LEDs with built-in IC, side-emitting LEDs, and 2mm-10mm DIP LEDs, packed in vacuum moisture-proof tape and reel, suitable for automated SMT mounting and reflow soldering.

6. How do I get the product datasheet?

Every model has an official PDF datasheet (electro-optical parameters, dimensions, pad design, tape packaging and reliability test data) — 259 datasheets in total, all free to download with no login required. Browse the datasheet center (https://www.hc-led168.com/datasheets) by series, or download directly from each product page.

7. Is Hongcheng Optoelectronics a factory or a trading company?

Hongcheng Optoelectronics is a member of Guangyu Group — a professional LED diode source manufacturer based in Dongguan, Guangdong, China, with 20+ years of LED packaging experience. Factory-direct sales; over 50% of raw materials are imported from South Korea, Japan and Taiwan, China. Quality and lead time are controlled directly by the factory.