0805 SMD LED Specifications: Forward Voltage, Current, Brightness & Reflow Profile (2026)
An 0805 SMD LED measures 2.0 × 1.25 mm and is typically driven at 5–10 mA. Forward voltage depends on color: 1.8–2.4 V for red and yellow, 2.8–3.4 V for green, blue, and white. Standard parts carry a 120° viewing angle and survive lead-free reflow at 260 °C peak for up to 10 seconds. The full parameter tables, a worked resistor calculation, soldering limits, and a 0603/1206 comparison are below. All values are typical industry figures — confirm against the Hongcheng HC-0805 series datasheet before design freeze.
0805 Package Dimensions and Land Pattern
The "0805" code comes from the imperial footprint: 0.08 × 0.05 inch, which converts to 2.0 × 1.25 mm. It is one of the most common packages for panel indicators, backlighting, and status lights because it balances board space against easy handling.
| Parameter | Typical Value |
|---|---|
| Length × Width | 2.0 × 1.25 mm (0805 imperial) |
| Height | 0.8 mm (lens-dependent, 0.6–1.1 mm range) |
| Terminal type | Bottom or side solder pads |
| Recommended pad size | 1.0–1.2 mm per pad (see datasheet land pattern) |
| Viewing angle | 120° (diffused lens) / 30–60° (water-clear options) |
Always design the PCB footprint from the land pattern in the manufacturer datasheet rather than a generic library — pad geometry varies slightly between suppliers and directly affects tombstoning risk during reflow.
Electrical Characteristics by Color
Forward voltage (VF) is set by the chip material: AlGaInP chips (red, orange, yellow) run lower; InGaN chips (green, blue, white) run higher. Design from the min/max range, not the typical value.
| Color | Dominant Wavelength / CCT | VF @ 10 mA (min–max) | Typical Luminous Intensity @ 10 mA |
|---|---|---|---|
| Red | 620–625 nm | 1.8–2.4 V | 60–180 mcd |
| Yellow / Amber | 588–592 nm | 1.8–2.4 V | 50–150 mcd |
| Yellow-Green | 565–575 nm | 1.8–2.4 V | 15–60 mcd |
| Green (InGaN) | 520–525 nm | 2.8–3.4 V | 150–450 mcd |
| Blue | 465–470 nm | 2.8–3.4 V | 50–180 mcd |
| White | 6000–6500 K (cool) | 2.8–3.4 V | 200–600 mcd |
Values are typical ranges per the Hongcheng HC-0805 series datasheet family; exact bins are listed per part number. Absolute maximum forward current is typically 20 mA — do not design at the maximum; 5–10 mA (or 2–5 mA for low-current versions) is the correct design point.
Drive Circuit Design
Current-limiting resistor calculation
An LED must never connect to a voltage rail directly. The series resistor is:
R = (Vcc − VF) / IF
Worked example — red 0805 on a 12 V industrial rail:
- VF = 2.0 V (typical red), IF = 10 mA
- R = (12 − 2.0) / 0.01 = 1000 Ω → choose the standard value 1 kΩ
- Resistor power: P = I² × R = 0.01² × 1000 ≈ 0.10 W → use a 0.25 W (1/4 W) resistor
For long wire runs or hot environments, drive at 7–9 mA instead of the full 10 mA to add margin for the LED's negative temperature coefficient.
Low-current versions for battery devices
Standard indicator LEDs are binned at 10 mA, but low-current 0805 versions reach usable brightness at 2–5 mA. For battery-powered or energy-harvesting designs, specify the low-current bin explicitly — a standard part driven at 2 mA will look dim and inconsistent.
PWM dimming
0805 indicator LEDs dim cleanly with PWM at 1–20 kHz. Keep the peak current at the rated IF (do not overdrive peaks to "average out" brightness), and avoid frequencies below ~200 Hz where flicker becomes visible on camera or to sensitive users.
Soldering and Reliability
Lead-free reflow profile
Industrial-grade 0805 SMD LEDs are rated for standard lead-free reflow:
| Profile Stage | Limit |
|---|---|
| Preheat | 150–180 °C for 60–120 s |
| Ramp rate | ≤ 3 °C/s |
| Peak temperature | 260 °C maximum |
| Time above 255 °C | ≤ 10 s |
| Reflow passes | 2 maximum |
Moisture sensitivity (MSL)
SMD LED packages absorb moisture that can delaminate the package during reflow ("popcorning"). Check the MSL level on the reel label (typically MSL 2a–3). If the floor life has been exceeded, bake reels per the datasheet (commonly 60–70 °C for 12–24 h) before mounting.
Anti-sulfurization for harsh environments
In environments with sulfur compounds (rubber seals, industrial atmospheres, outdoor cabinets), silver-plated lead frames can blacken and kill light output. For these applications, specify an anti-sulfurization package and 99.99% gold-wire bonding — both are standard options in the Hongcheng industrial-grade 0805 series.
0805 vs 0603 vs 1206: Quick Decision Table
| Parameter | 0603 | 0805 | 1206 |
|---|---|---|---|
| Size (mm) | 1.6 × 0.8 | 2.0 × 1.25 | 3.2 × 1.6 |
| Typical max IF | 5–10 mA | 5–10 mA | 5–10 mA (20 mA max) |
| Thermal margin | Lowest | Medium | Highest |
| Hand soldering / rework | Difficult | Manageable | Easy |
| Board space | Smallest | Medium | Largest |
| Typical use | Dense boards, wearables | Industrial indicators, panels | Legacy designs, high-power indicators |
Rule of thumb: if your design is not space-constrained, 0805 is the safest default — enough thermal margin for industrial panels, and still hand-reworkable during prototyping.
How to Order / Free Samples
Hongcheng Optoelectronics manufactures the HC-0805 series in Dongguan, China, with A-grade chips and 99.99% gold-wire bonding as standard. We support:
- Custom wavelength and brightness bins — specify your target window and we bin to it
- Free samples for design validation, with matching datasheet
- OEM/ODM customization — special lens colors, low-current bins, anti-sulfurization builds
- Batch consistency guarantee — single-bin supply for production runs
📋 Need samples or a bulk quote? Tel/WeChat: +86 139 2571 4318 | Email: sales@led-hc.com | Download the HC-0805 datasheet
FAQ
What is the forward voltage of an 0805 red LED?
A red 0805 LED has a forward voltage of 1.8–2.4 V at the standard 10 mA test current, with 2.0 V typical. Use the min–max range from the datasheet, not the typical value, when calculating your current-limiting resistor.
Can 0805 LEDs be hand-soldered?
Yes, with care. The 0805 package is the smallest SMD LED most technicians can hand-solder comfortably. Tack one pad first, use a fine-tip iron at 300–320 °C, and keep contact under 3 seconds per pad. For volumes beyond prototypes, use reflow.
What resistor do I need for an 0805 LED on 12 V?
For a red 0805 (VF ≈ 2.0 V) at 10 mA: R = (12 − 2.0) / 0.01 = 1000 Ω, so use a standard 1 kΩ, 0.25 W resistor. For green, blue, or white (VF ≈ 3.0 V): R = (12 − 3.0) / 0.01 = 900 Ω, so use 910 Ω, 0.25 W.
Are 0805 LEDs RoHS compliant?
Yes. Hongcheng 0805 SMD LEDs are RoHS and REACH compliant, lead-free reflow compatible, and manufactured under ISO9001 quality management. Compliance documents are available with the datasheet pack.
What is the difference between diffused and water-clear 0805 LEDs?
A diffused (milky) lens scatters light into a wide 120° viewing angle with soft, even appearance — best for panel indicators viewed from any direction. A water-clear lens concentrates light into a narrower 30–60° beam with higher on-axis intensity — best for focused status lights and light-pipe inputs.
