40. High-Brightness Indicator LED
1. Component Purpose
On an industrial front panel, ambient light from factory lighting, windows, and other displays can make standard LEDs hard to see. A high-brightness LED (≥80mcd) with a wide viewing angle (≥100°) ensures the indicator is clearly visible from any reasonable position.
Red is the standard color for alert, fault, or warning indicators in industrial equipment.
Required: Red · 1206 · SMD · Vf 1.8–2.4V · 20mA · ≥80mcd · ≥100° viewing · −40°C to +85°C · RoHS
2. How to Find It on DigiKey
Go to DigiKey.com → Optoelectronics → LED Indication - Discrete
Apply these filters:
- Color → Red
- Package / Case → 1206 (3216 Metric)
- Millicandela Rating → 80mcd or higher
- Viewing Angle → 100° or wider
- Mounting Type → Surface Mount
- Part Status → Active
Tip: Series resistor for 12V supply: R = (12V − 2V) / 20mA = 500Ω. Nearest standard value is 470Ω (gives ~21mA) or 510Ω (gives ~19.6mA). Both are fine.
3. Key Specifications & What They Mean
| Specification | Required | Why |
|---|---|---|
| Color | Red | Standard for fault/warning indication. |
| Package | 1206 | Visible front-panel LED size. |
| Forward Voltage | 1.8V to 2.4V | Typical red LED range; for resistor calc. |
| Test Current | 20mA | Standard brightness drive level. |
| Luminous Intensity | ≥80mcd | Bright enough for factory lighting. |
| Viewing Angle | ≥100° | Visible from side angles too. |
| Temp Range | −40°C to +85°C | Indoor industrial range. |
| RoHS | Yes | Compliance required. |
4. Selecting a Safe, Production-Ready Part
The filtered list will show matching parts. Before you pick one, check: Is it Active? Is stock available? Is the manufacturer reputable? Is a datasheet available?
Full checklist: How to Select a Safe, Production-Ready Component — EWskills Guide