10mm Round Top Red LED - Ultra Bright

The 10mm red led has many great uses.

In stock

SKU
10MMROUNDTOPLEDRED
Color
Red
Size
10mm Round Top Clear
$0.45
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Description / 10mm Round Top Red LED - Ultra Bright

The 10mm Red LED (Round Top, Clear) is the standard through-hole LED for power-on indicators, brake/tail light accents, model railroad stop signals, alarm and fault LEDs. Clear lens with a focused 20-30 Degrees beam — bright and directional, the classic DIP LED that fits every breadboard, panel bezel, and holder on the market.

The 10mm (T-3¼) head is the largest standard DIP LED — visible from a distance, designed for panel-mount bezels, G-scale model railroad, and any application where the LED needs to command attention.

Size10mm (T-3 1/4)
Forward Voltage1.8-2.2v
Brightness8,000-10,000mcd
Viewing Angle20-30 Degrees
LensClear — focused beam
PackageT-3 1/4 through-hole DIP
Drive Current20mA typical

Common applications

  • Power-on and status indicators: The universal "on" signal. Breadboard prototyping, enclosure builds, equipment panels.
  • Model railroad signals: Block signal stop aspect, grade crossing heads, yard limit indicators. Clear lens for focused, directional signal visibility.
  • Automotive accent: Brake indicator, taillight accent, dashboard warning LED relamp. 12V with appropriate resistor.
  • Christmas light replacement: Replace burnt-out C7/C9 string light bulbs with LEDs — cooler running, longer lasting.
  • Guitar pedal indicator: Red is the standard "effect active" color across all DIY stompbox communities.

Standard T-3 1/4 through-hole footprint. Fits all 10mm LED holders, bezels, and panel-mount clips. Add a current-limiting resistor matched to your supply voltage — see our LED Resistor Calculator for the exact value.

Need a wider beam? See our Diffused LEDs for soft glow applications.

Resistor quick reference (20mA):
SupplyResistorRating
5V150Ω1/4W
9V360Ω1/4W
12V510Ω1/4W
15V*680Ω1/2W
18V820Ω1/2W

*Use 15V instead of 12V for vehicle/alternator sources to account for charging voltage (13.8–14.4V).

Full LED Resistor Calculator → for other voltages, series strings, and parallel configurations. Or skip the math with our 20mA Current Limiter (2–45V DC).

Frequently Asked Questions

Yes. Standard LEDs require a current-limiting resistor matched to your power supply voltage. Use our LED Resistor Calculator at /blog/led-resistor-calculator.html to find the exact value.
Clear lens LEDs produce a focused, directional beam (15-30 degrees) — bright when viewed head-on. Diffused lens LEDs scatter light evenly for a soft glow visible from all angles. Use clear for signals and indicators; use diffused for ambient lighting and props where the LED is visible.
Yes. Connect through a current-limiting resistor (typically 220-330 ohm for 5V) to any digital output pin. The LED Resistor Calculator can help you find the exact value for your setup.

DC power recommended: LEDs are designed for DC. Running on AC will cause flickering and reduce lifespan. If you're using a low-voltage AC source — such as a model railroad transformer output or DCC track voltage — convert it to DC first with a bridge rectifier.

Also available: 8mm (smaller)

Sold individually (1 LED per quantity ordered).

PCB Design: KiCad footprint: LED_THT:LED_D10.0mm (built-in with KiCad). EasyEDA: search “LED_D10.0mm” in the built-in library. Download KiCad files ↓

Specifications are sourced from manufacturer data and may be updated without notice. While we work to keep product information accurate, always verify critical parameters against the manufacturer's datasheet for production designs. Found an error or discrepancy? Let us know — we genuinely appreciate the correction.

More Information

Size 10mm Round Top Clear
Color Red
Luminosity/Brightness 8,000-10,000 mcd
Forward Voltage 1.8-2.2v
Current 20mA
Wavelength 620-625nm
Viewing Angle 20-30 Degrees
Mount Style Through Hole (DIP)
Lens Color Clear
LED Brightness Class Super/Ultra/Extreme
Documentation Link Documentation: 10mm Round Top Red LED Datasheet / Specifications

Customer Images

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