3535 Flat-Top SMD LED
3535 Flat SMD LEDs - Hongcheng Optoelectronics LED Manufacturer
Product Overview:
The 3535 is a high-brightness top-emitting SMD LED with a 3.5×3.5mm package, featuring high brightness, good heat dissipation, stable light output and long service life.
Key Advantages:
- 3535 standard package with concentrated top emission
- High-brightness output with uniform light color and good consistency
- Good heat dissipation for prolonged stable operation
- White, red, green, blue and other colors available
- Brightness, color temperature, wavelength and voltage binning available
- Suitable for automated SMT production and reflow soldering
Applications:
- LED luminaires, spotlights, downlights and bulb lamps
- Automotive lighting, daytime running lights and auxiliary lighting
- Outdoor illumination, landscape lighting and advertising light sources
- Industrial lighting, machine vision and instrumentation
- High-power backlight modules and specialty lighting
Product Features:
Chips: A-grade chips from leading brands in Taiwan and mainland China provide high brightness, low lumen depreciation, stable output and strong ESD resistance.
Gold wire: 99.99% pure gold wire bonding provides good conductivity and rapid heat transfer, improving product reliability.
Encapsulant: high-quality material resists high temperatures, sulfurization and lumen depreciation, providing uniform light output.
Lead frame: A highly thermally conductive lead frame provides good heat dissipation, easy solder wetting and oxidation resistance.
Packaging: Vacuum moisture-resistant tape packaging, with reel shipment available for automated SMD production.
Category: Large SMD LED Series
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 | Optical Output (see values for units) | Viewing Angle 2θ½ (°) | Test Current IF (mA) | Operating Temperature |
|---|---|---|---|---|---|---|---|
| Red | HC-LDS-3535-G45-630C | 2~2.4 | 625~635 nm | 50~80 lm | 120 | 500 | -20~+60℃ |
| Yellow | HC-LDS-3535-G45-595C | 2~2.4 | 590~600 nm | 40~50 lm | 120 | 500 | -20~+60℃ |
| Blue | HC-LDS-3535-S4046-455C | 3~3.4 | 450~460 nm | 40~45 lm | 120 | 500 | -20~+60℃ |
| Red | HC-H1T3535RGB-C-C2 | 2~2.4 | 620~625 nm | 15~22 lm | 120 | 150 | -40 ~ +80℃ |
| Pure Green | 2.8~3.2 | 520~525 nm | 30~40 lm | 120 | 150 | -40 ~ +80℃ | |
| Blue | 2.8~3.2 | 455~460 nm | 5~10 lm | 120 | 150 | -40 ~ +80℃ |
3535 Flat-Top SMD LED An SMD LED indicator in a 3535 package (3.5×3.5mm), with a forward voltage of 1.8~3.4V (depending on emission color) and 20mA-class drive. Supports fully automated placement and reflow soldering. Supplied directly by Dongguan Hongcheng Optoelectronics Co., Ltd. (an international member of Guangyu Group, with over 20 years of LED packaging experience). Uses A-grade chips and 99.99% pure gold wire bonding, with RoHS certification. Free samples and custom brightness bins, color-temperature bins and tape-and-reel packaging are available. Download the datasheet PDF on this page for complete electrical specifications and mounting dimensions.
Q: Can mid-power LEDs such as 2835/3014 be connected directly to 220V?
A: No. These LEDs are low-voltage 2-3.4V devices and require a constant-current driver supply. We can provide driver matching advice and support for complete luminaire solutions.
Q: What placement-machine accuracy does this LED require?
A: This product uses a 3535 package (3.5×3.5mm) with relatively large pads. Standard high-speed placement machines are adequate, with no special equipment accuracy requirements. Supports lead-free reflow soldering (peak ≤260℃/≤3s).
Product Specifications at a Glance
| Product Name | 3535 Flat-Top SMD LED |
|---|---|
| Package: | SMD package |
| Dimensions | 3.5×3.5mm |
| Mounting: | SMD surface mounting (suitable for reflow soldering) |
| Emission Color | Single-color / RGB Full-color Available |
| Environmental Certification | RoHS |
| Packaging Quantity | 1,000 pcs/reel (tape-and-reel) |
| 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) | 1K (1,000 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 LED luminaires, spotlights, downlights and bulbs, automotive lighting, daytime running lights and auxiliary lighting, outdoor illumination, landscape lighting and advertising light sources, industrial lighting, machine vision and instrumentation.
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 |
Q: What power ratings are available for 3535 high-power LEDs?
A: Models in production cover 1W~3W (such as 2W red, 3W white and RGB 1.5W), with ceramic/EMC lead frames. Aluminum-core PCB heat dissipation and constant-current drive are required.
Ordering and Inquiry Information
Tape-and-reel packaging contains 1,000 pcs per reel. Minimum order quantity: 1K (1,000 pcs; full reels only). 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.
