Frequently Asked Questions - HC Optoelectronics LED Manufacturer

I. Company & Qualifications

1. What does HC Optoelectronics specialize in? Dongguan HC Optoelectronics Co., Ltd., a member enterprise of Guangyu Group, is a professional LED (Light Emitting Diode) manufacturer located in Dongguan, Guangdong Province with over 20 years of LED packaging experience. We focus on R&D, production and wholesale of SMD LED and DIP LED. We support in-stock supply, customized specifications and OEM service with direct factory sales.
2. What certifications do HC Optoelectronics products obtain? Our products comply with RoHS, CE and other standards. We adopt Grade A chips, 99.9% pure gold wire bonding and high-temperature resistant encapsulation glue. More than 50% of raw materials are imported from South Korea, Japan and Taiwan, China to guarantee consistent performance and long-term reliability of LED beads.
3. Is HC Optoelectronics a factory or a trading company? We are a manufacturing factory instead of a trading firm. We own independent packaging production lines at Guangdong Guangyu Semiconductor Technology Co., Ltd. located in Songhu Zhigu, Songshan Lake. All procedures including die bonding, wire bonding, packaging, sorting and binning are completed in-house, enabling deep customization and direct factory pricing.
4. How can I contact HC Optoelectronics for quotation? Tel / WhatsApp: +86 139 2571 4318 Email: sales@led-hc.com Kindly provide model number or specification requirements, and we promise to send quotation and lead time within 1 working day.

II. Product Selection

5. What are the differences between SMD LED and DIP LED? How to choose? SMD LED features compact size, suitable for automatic SMT assembly and reflow soldering, ideal for high-density and mass production. DIP LED comes with through-hole pins, convenient for manual soldering and maintenance, with more flexible options for viewing angle and power. For mass production and space-limited products such as instruments and electronic devices, SMD LED is recommended. For small-batch production, frequent maintenance or applications requiring bent long pins, DIP LED is a better choice.
6. What is the difference between 0603 and 0805 SMD LEDs? The core difference lies in dimensions: 0603 size is approx. 1.6×0.8mm, while 0805 is approx. 2.0×1.25mm. 0603 saves PCB space for miniaturized products; 0805 has larger power margin and easier soldering. We supply both types in red, yellow, blue, green, orange, white, bi-color and other versions.
7. What is addressable LED? What is the difference between addressable LED and RGB LED? Addressable LED integrates built-in IC driver chips (0807, 1515, 2020, 4020 addressable series etc.). Each single LED can realize dynamic effects such as running light and gradient lighting via programming, working as one independent pixel. Ordinary RGB LED requires external driver circuits to control three color channels separately. Addressable LED is preferred for light strips, pixel screens and ambient lighting; RGB LED is suitable for static indicator lights.
8. What applications are side-emitting LED beads suitable for? Side-emitting LEDs (020, 3010, 3015, 0402, 0602, 0802, 1204, 4509 series etc.) emit light parallel to the PCB board. They are widely used in edge-lit backlight, ultra-thin indicator lights, key backlight and other space-constrained scenarios.
9. How to pair IR transmitter and IR receiver? IR transmitters (5mm round type, 1206 SMD IR transmitter etc.) emit invisible infrared light, while IR receivers (nose type, molded through-hole receiver, 1206 SMD receiver etc.) receive and demodulate infrared signals. When selecting parts, ensure the emission wavelength matches the central wavelength of the receiver. For remote control applications, 940nm transmitters normally match 38kHz receivers. We provide pre-matched IR transmitter & receiver sets.
10. What are the features of Piranha LED? Piranha LED adopts 4-pin through-hole packaging. It achieves better heat dissipation than standard 2-pin DIP LEDs, withstands higher driving current and delivers higher brightness. It is commonly used in automotive lights, signal lights and other high-brightness applications. We supply specifications including 5mm flat-top Piranha LED.
11. Can digital displays be customized? Yes. We offer standard digital tube series and support customization on dimension, luminous color, brightness, common anode / common cathode and pin definition, applicable to instruments, home appliance display panels and other mass-production scenarios.
12. Do you supply LEDs for automotive lighting? Yes. Our automotive LED series includes dedicated beads and modules for motorcycle angel eyes, demon eyes, daytime running lights, side marker lights, as well as finished lamps such as forklift boundary lights. We support selection for 12V / 24V operating voltage platforms.

III. Technical Parameters

13. What is the working voltage of LED beads? Forward voltage varies by color: Red, yellow, yellow-green: approx. 1.8–2.4V Blue, pure green, white: approx. 2.8–3.4V The exact forward voltage (Vf), rated current, brightness and wavelength shall refer to the official datasheet of corresponding model. 259 datasheets are available for free download on our website: https://www.hc-led168.com/en/datasheets-2
14. What is LED sorting and binning? Discrepancies exist in brightness and wavelength after LED production. Sorting and binning classify LEDs into different groups according to brightness and wavelength ranges. We perform sorting and binning for every batch to ensure consistent brightness and color within one shipment. Customized bin ranges are available upon client request.
15. What is the recommended soldering temperature for LED beads? SMD LEDs: adopt reflow soldering. Peak temperature shall not exceed 260°C with duration within 10 seconds. DIP LEDs: manual soldering temperature below 300°C, single-point soldering time ≤3 seconds. Keep proper distance between solder joint and encapsulation. Detailed soldering profile is listed in corresponding datasheets.
16. Are LEDs sensitive to static electricity? How to implement ESD protection? Yes. GaN-based chips including blue, white and green LEDs are especially vulnerable to ESD. Workshops should equip anti-static wristbands, ESD mats and ion fans. LEDs must be stored in anti-static packaging. Our products reach HBM ESD resistance of 2000V, yet standard ESD operation procedures are still required.
17. What is the service life of LED beads? Under rated current and favorable heat dissipation conditions, the theoretical service life of LED beads can exceed 50,000 hours. Light decay depends on chip quality, encapsulation glue and operating current. We utilize Grade A chips and high-temperature resistant encapsulation materials to avoid yellowing and discoloration during long-term operation.
18. Where can I download LED datasheets? Our datasheet center provides free PDF datasheets for all 259 models, including optoelectronic parameters, dimension drawings, pad layout, tape & reel packaging and reliability test data. No login required: https://www.hc-led168.com/en/datasheets-2

IV. Customization & Service

19. Can luminous color, brightness and wavelength of LED beads be customized? Yes. We support customization on luminous color, brightness range, wavelength scope, epoxy color (transparent / milky white / colored), pin length and bent pin forming (such as F3/F5 90° bent pins). Customized color temperature or chromaticity coordinates for white LEDs are also available.
20. What is the process for customized LED beads?
21. Provide specifications (dimension, color, brightness, wavelength, voltage)
22. We evaluate requirements and provide solution & quotation
23. Prototype sampling upon confirmation
24. Sample verification
25. Mass production
26. Sorting, binning and outgoing inspection Sampling lead time: 3–4 working days.
27. What is the Minimum Order Quantity (MOQ)? MOQ for DIP LED: 1,000 PCS MOQ for SMD LED: 3,000–5,000 PCS Standard models in stock accept small-batch orders.
28. Can I get free samples? Yes. We offer free sample service for pre-production verification before bulk order. Contact us via Tel / WhatsApp +86 139 2571 4318 or email sales@led-hc.com with required model and quantity. Free sample limit: 100 PCS.
29. What is the typical delivery lead time? In-stock standard models can be shipped promptly. Lead time for customized products depends on customization details and quantity, normally 7–10 working days, subject to formal contract.
30. Do you support OEM service? Yes. We provide OEM service. We can customize packaging and labels in accordance with brand owners’ requirements, and supply test reports and certification documents for export.

V. Purchasing & After-sales

25. How to obtain LED quotation? Send us model number (or dimension, color, brightness requirements) and estimated order quantity via Tel / WhatsApp +86 139 2571 4318 or email sales@led-hc.com. Direct factory pricing with tiered discount for bulk purchase.
26. What if quality defects are found on LED beads? Every batch undergoes full inspection and sampling test before shipment, with inspection report attached. If quality issues are found after receipt, please contact us timely. We provide 2-year warranty, and support replacement or replenishment according to contract terms.
27. How to guarantee LED consistency for bulk orders? Bulk orders will be delivered within the same bin group with sorting data provided. For long-term orders requiring cross-batch consistency, we can lock bin ranges and reserve samples for comparison to ensure follow-up batches match initial samples.
28. Can you provide technical support for product selection? Yes. Our engineering team can recommend suitable package type, brightness and driving parameters according to your product application (indicator, backlight, lighting, display). We also assist in solving application problems related to soldering, static protection and light decay.

VI. Special Specifications & Compliance

35. Do you offer custom through-hole LED indicator lamps? Yes. We provide custom through-hole LED indicator lamps (DIP LED) in 2mm, 3mm, 5mm, 8mm and 10mm round and straw-hat packages. Emitting color, brightness bin, wavelength, lens type (clear or diffused), lead length and lead forming can all be customized. Standard MOQ is 1K pcs with factory-direct pricing.
36. Do you have SMD side view multi-color indicator LEDs? Yes. Our side view SMD LED series includes bi-color and RGB multi-color options, designed as SMD side view multi-color indicator LEDs for instrument panels and control boards, supplied in tape-and-reel packing for automatic SMT assembly.
37. Do you have signal indicator LED diodes for industrial panels? Yes. Our signal indicator LED diodes and industrial panel status LEDs are widely used in industrial control equipment, power supplies and HMI panels. Both through-hole and SMD packages are available, built with A-grade chips and 99.9% pure gold wire bonding for long-term reliability.
38. Are your products RoHS compliant and halogen free? Our products comply with RoHS requirements. Halogen-free molding compounds are available on request, and we provide material declarations and third-party test reports. For PFAS-related compliance documents, please contact our engineering team at +86 139 2571 4318 (Tel / WhatsApp). All third-party test reports (RoHS, REACH 253 SVHC, POPs, TSCA, Halogen Free) are free to download on our Download Materials page.
39. Do you have low current SMD LED indicators? Yes. We offer low current SMD LED indicator solutions for battery-powered and low-power devices. Please refer to each model's datasheet for the minimum driving current and corresponding brightness, or contact our engineering team for selection support. For a side-by-side comparison of all SMD indicator models and parameters, see our 2026 Complete LED Lamp Bead Model & Parameter Guide.

Cannot find your answer? Tel / WhatsApp: +86 139 2571 4318 Email: sales@led-hc.com Datasheet Center: https://www.hc-led168.com/en/datasheets-2