3mm LED Diode with 38mm Long Leads – Compact Indicator LED for Deep Panels & Precision Mounting

The 3mm LED diode with 38mm long leads is a compact, high-brightness indicator designed for applications where standard short-lead LEDs cannot reach. Its extended 38mm lead length enables effortless installation through thick or multi-layer panels, mechanical housings, offset PCB mounting, and custom wiring layouts.

This LED is widely used by electronics manufacturers, engineers, and equipment designers who need a dependable and flexible through-hole indicator for industrial, commercial, and consumer electronic devices.

With excellent brightness, low power consumption, and precision-formed long pins, this LED provides consistent performance in both high-volume production and custom prototype applications.

⭐ Key Features

1. Compact 3mm Round LED Package

The classic 3mm LED diode format is ideal for tight spaces and high-density PCBs.
Benefits include:

• Small footprint

• Precise, focused light output

• Compatibility with a wide range of indicator housings

2. Extra-Long 38mm Leads

The standout feature of this device is its 38mm extended lead length, providing unmatched installation flexibility:

• Easily passes through thick plastic or metal panels

• Suitable for hand-bent shaping and offset mounting

• Allows front-panel indication even when PCBs are placed deep inside equipment

• Perfect for breadboards and prototyping setups

These long leads prevent the need for additional wiring or adapters.

3. Multiple Lens Options

Available in:

• Water clear

• Diffused

• Color-tinted clear

Each lens option supports different lighting requirements—from high-intensity brightness to soft, uniform glow.

4. High Brightness, Low Current

Advanced LED chips deliver:

• Strong illumination

• Low energy consumption

• Compatibility with microcontrollers, driver ICs, and low-voltage circuits

Ideal for battery-powered devices or low-power systems.

5. Durable, High-Quality Build

Made from:

• Heat-resistant epoxy resin

• Corrosion-protected extended leads

• Shock-resistant lens structure

Ensuring long life even in demanding applications.

6. Fully ROHS-Compliant

Meets environmental and international safety standards for global production and export.

⭐ Applications

The 3mm LED diode with 38mm long leads is engineered for installations requiring extra reach or flexible mounting geometry.

✔ Industrial Control Equipment

• Status indicators

• Warning lights

• Machine monitoring

Long leads allow LEDs to reach through metal enclosures and protective housings.

✔ Consumer Electronics

• Home appliances

• Compact displays

• Portable devices

The 3mm size fits compact designs while offering strong visibility.

✔ Telecommunications

• Signal indication

• Network equipment status lights

• Panel-mounted interface indicators

✔ Automotive & Transportation Electronics

• Dashboard add-ons

• Internal indicator modules

• Custom switches

✔ R&D Labs and Prototyping

Ideal for:

• Breadboards

• Rapid wiring

• Testing circuits

• Adjustable positioning

The long leads are easy to bend without breaking.

⭐ Benefits & Advantages

✔ Greater Mechanical Flexibility

38mm long leads provide extended reach, making this LED suitable for:

• Thick panels

• Deep chassis mounting

• Multi-board assemblies

✔ Improved Heat Dissipation

The longer pins act as mini heat spreaders, improving thermal stability.

✔ Easier Handling & Assembly

Extra lead length allows:

• Convenient soldering

• Firm gripping during assembly

• Customized lead shaping

✔ High Reliability in Harsh Environments

The LED maintains consistent brightness and reliability across:

• Temperature variations

• Mechanical stress

• Continuous operation

✔ Ideal for Low-Current Applications

Maintains strong visibility even with energy-saving designs.

⭐ Case Study: Control Panel OEM

A European manufacturer building compact control stations required LEDs that could pass through a 15–20mm thick aluminum front panel while the PCB sat deep inside the enclosure.

Standard LEDs were too short, requiring costly extensions and manual wiring. After switching to the 3mm LED diode with 38mm long leads, they achieved:

• 40% faster assembly time

• No more custom lead extensions

• Higher consistency in LED alignment

• Reduced wiring errors

This upgrade significantly improved their production efficiency.

⭐ User Testimonials

Electronics Engineer – Germany
“These 3mm LEDs with 38mm leads solved all our deep-panel mounting issues. Easy to solder and very reliable.”

DIY Prototyper – USA
“Perfect for breadboard layouts and custom projects. The long leads make shaping and alignment simple.”

Industrial Equipment Maker – Singapore
“Excellent brightness and durable pins. Works flawlessly even in high-vibration control cabinets.”

⭐ Conclusion

The 3mm LED diode with 38mm long leads is a compact yet powerful indicator LED designed for engineering flexibility. With superior brightness, extended leads, and exceptional mounting freedom, it is an ideal choice for industrial control systems, deep panel designs, custom electronics, and prototyping environments.

If your project demands a small LED with long reach, stable performance, and easy installation, this model is one of the best solutions available.