4509 Side-Emitting LED
4509 Side-Emitting RGB LEDs - Hongcheng Optoelectronics LED Manufacturer
Product Overview
The 4509 side-emitting SMD LED is a large SMD light source offering stable side emission, high brightness, a large emitting area, good color consistency, good heat dissipation and easy placement. Suitable for light-guide plates, backlight modules, LED bars and strips, appliance panels, advertising signs, instruments, meters, edge lighting and lighting structures in various electronics. Custom color, brightness, voltage, wavelength and packaging are available to customer requirements.
Key Advantages
• Large side-emitting package: The 4509 package provides a larger emitting area for high-brightness side-emission applications
• High, stable brightness: Bright, uniform emission for volume use in backlight modules, LED bars and strips
• Good heat dissipation: the larger package helps improve product stability
• Wide application range: suits light-guide plates, backlight modules, panel lighting and side-lighting structures
• Easy placement: Supports automated SMT production with efficient soldering
• Customization: Color, brightness, wavelength, voltage, lead frame and packaging can be customized
Applications
• Light guide panels and light pipes
• Backlight modules
• LED bars and strips
• Home appliance control panels
• Advertising signs and lightbox lighting
• Instrument displays
• Edge lighting and decorative lighting
Product Features
Chips: Grade A chips from leading brands in Taiwan and mainland China deliver lasting luminous efficacy, stable output and strong ESD resistance. Withstands two reflow soldering cycles and has passed thermal shock testing.
Gold wire: 99.99% pure gold wire bonding provides good conductivity, rapid heat transfer and strong stability.
Encapsulant: high-quality material resists sulfurization and blue-light degradation, improving brightness and reliability.
Lead frame: gold-plated/silver-plated options offer good thermal conductivity, easy solder wetting and oxidation resistance.
Packaging: Vacuum moisture-resistant packaging; reel/tape packaging is available for automated SMD production.
Category: 4509 Side-emitting
Quick Reference: Key Optoelectronic Parameters (by Emission Color)
Test conditions: See the IF column for test current; ambient temperature 25℃. Data is taken from each model's datasheet. “—” indicates that the datasheet does not specify this item. Download the corresponding PDF for complete specifications.
| Emission Color | Part Number | Forward Voltage VF (V) | Wavelength / Color Temperature CCT | Luminous Intensity Iv (mcd) | Viewing Angle 2θ½ (°) | Test Current IF (mA) | Operating Temperature |
|---|---|---|---|---|---|---|---|
| Red | HC-020T3C-RGB-BBB-LJHL | 1.8~2.4 | 620~625 nm | 400~800 | 120 | 20 | -40 ~ +80℃ |
| Pure Green | 2.8~3.4 | 517~523 nm | 1000~1500 | 120 | 20 | -40 ~ +80℃ | |
| Blue | 2.8~3.4 | 465~470 nm | 300~600 | 120 | 20 | -40 ~ +80℃ |
Related Products
Q: How is the placement orientation of side-emitting LEDs determined?
A: Orient the emitting surface toward the light-entry side of the light guide panel. The first datasheet page includes a placement orientation diagram. Contact our engineering team for stencil aperture and pad design recommendations.
Q: What placement-machine accuracy does this LED require?
A: This 4509 package (4.5×0.9mm) has relatively large pads. A standard high-speed placement machine is sufficient, with no special accuracy requirements. Lead-free reflow soldering is supported (peak ≤260℃/≤3s).
Product Specifications at a Glance
| Product Name | 4509 Side-Emitting LED |
|---|---|
| Package: | SMD Package (Side-emitting) |
| Dimensions | 4.5×0.9mm (4509 package) |
| Mounting: | SMD surface mounting (suitable for reflow soldering) |
| Emission Color | Single-color / RGB Full-color Available |
| Environmental Certification | RoHS |
| Packaging Quantity | 4,000 pcs/reel (taped) |
| Manufacturer | Dongguan Hongcheng Optoelectronics Co., Ltd. |
| Customization: | Custom colors, brightness and wavelength binning, and encapsulants available; confirm details when requesting a quote |
| Detailed Specifications | See the datasheet PDF on this page for complete electrical parameters |
| Minimum Order Quantity (MOQ) | 4K (4,000 pcs, Tape and Reel 1 Reel) |
| Sample Lead Time | Typically 3-4 working days |
| Volume Production Lead Time | Typically 10-15 working days |
💡 Typical Applications: Common applications include PCB status indication, backlighting and ambient lighting. Supports fully automatic SMT assembly and reflow soldering.
Forward Voltage and Wavelength Quick Reference by Color
Voltage varies significantly between colors in the same package. Select current-limiting resistors using the values for the specific color:
| Emission Color | Wavelength Range | Forward Voltage | Chip Material |
|---|---|---|---|
| Red | 620~625nm | 1.8~2.4V | AlGaInP |
| Yellow | 585~595nm | 1.8~2.4V | AlGaInP |
| Orange | 600~610nm | 1.8~2.4V | AlGaInP |
| Standard Green | 565~575nm | 1.8~2.4V | AlGaInP |
| Emerald Green | 520~530nm | 2.8~3.4V | InGaN |
| Blue | 450~470nm | 2.8~3.4V | InGaN |
| White (Neutral White) | Full Spectrum | 3.0~3.4V | InGaN + phosphor |
Ordering and Inquiry Information
SMD models use tape-and-reel packaging (quantity per reel is subject to the corresponding datasheet), with minimum orders in full reels. Sample lead time is typically 3-4 working days; volume production lead time is typically 10-15 working days (subject to order confirmation). For volume pricing, use the inquiry link on this page or phone/WeChat 139 2571 4318. Specify the exact part number and quantity.
Selection Recommendations
Forward voltage varies considerably by color/model (commonly 1.8~3.4V). Calculate current-limiting resistors using the VF range in the selected model's datasheet, and set the reflow profile according to the corresponding datasheet.
Related Reading: LED Indicator Part Number Comparison Table (Complete 2026 Edition) ｜ Datasheet Download Center
Note: The parameters on this page were compiled against product documentation on 2026-09-17. Items not provided in a datasheet are not assigned uniform values. Refer to the datasheet for the relevant part number.
