2.0×3.0×4mm Rectangular Type LED Lamps – One Curved Side Design for Enhanced Light Control

The 2.0×3.0×4mm rectangular type LED lamp, designed with a rectangle body featuring one curved side, is a compact and versatile indicator LED ideal for modern electronic applications. This unique geometry combines the sharp visibility of a rectangular LED with the soft light distribution provided by a semi-curved lens. As a result, the LED delivers excellent optical performance, uniform brightness, and a modern appearance suited for industrial and consumer electronic devices.

Its small size, low power consumption, and reliable through-hole design make it a widely used LED for signaling, instrument panels, portable devices, and control displays.

⭐ Key Features

1. Unique Rectangular Shape With One Curved Side

• One side is flat for tight PCB alignment.

• The curved side enhances the diffusion of light and improves viewing angles.

• Aesthetic visual appearance makes it suitable for display windows and indicator panels.

2. Compact 2.0 × 3.0 × 4mm Size

This miniature package is perfect for:

• Dense PCB layouts

• Compact handheld devices

• Slim indicator windows

• Precision electronic modules

Its small footprint allows designers to save space without sacrificing illumination quality.

3. High Brightness Output

Engineered with efficient LED chips for:

• Strong visibility in various ambient light conditions

• Stable brightness

• Uniform optical performance across the lens surface

Suitable for environments requiring clear and reliable status signaling.

4. Multiple Color Options Available

Common colors include:

• Red

• Green

• Yellow

• Blue

• Bi-color options

This versatility makes it adaptable to different signaling and coding applications.

5. Excellent Light Uniformity

The curved side provides:

• Softer light emission

• Reduced glare

• Enhanced side-view visibility

Ideal for horizontal or angled mounting applications.

6. Low Power, Long Life

• High efficiency means minimal power consumption

• Ideal for battery-operated equipment

• Long lifespan with excellent reliability

7. Through-Hole Mounting for Durability

• Strong mechanical stability

• Suitable for industrial devices exposed to vibration

• Easy to solder and integrate into traditional PCB designs

⭐ Applications of the 2.0×3.0×4mm Rectangular LED

This LED type is widely used across industries due to its brightness, compact size, and clear visibility.

✔ Instrumentation Panels

Perfect for instruments requiring crisp indicators or status LEDs.

✔ Consumer Electronics

Used in products such as:

• Audio devices

• Home appliances

• Charging indicators

• Handheld tools

✔ Industrial Control Systems

Provides reliable signaling for:

• Machine panels

• Control buttons

• Fault indication

✔ Communication Devices

Clear visibility for:

• Network indicators

• Modems

• Signal equipment

✔ Automotive and Transportation Electronics

Suitable for dashboard instrumentation and compact display clusters.

✔ Small Displays and Light Bars

Can be arranged into:

• Multi-LED arrays

• Custom indicators

• Light bars and bar-graph signals

⭐ Benefits of the Rectangular LED with One Curved Side

✔ Improved Viewing Angle

The curved side enhances wide-angle visibility, making it easier to view from different directions.

✔ Aesthetic and Functional

The hybrid rectangular–curved design improves appearance while enhancing optical performance.

✔ Space-Efficient Design

Small package fits perfectly into tight enclosures and compact indicator designs.

✔ High Reliability

Its through-hole structure makes it durable in industrial and high-vibration environments.

✔ Visual Comfort

The curve diffuses light and avoids harsh hotspots seen in typical rectangular LEDs.

⭐ Case Study

A portable medical sensor manufacturer needed an LED indicator with:

• Small footprint

• Soft, uniform illumination

• Clear visibility in bright hospital environments

By integrating the 2.0×3.0×4mm rectangular LED with one curved side, they achieved:

• Higher visual clarity on device status

• Reduced eye strain for clinicians

• Space savings on the PCB

• A cleaner, more modern look for their product

The LED became a standard component in their updated product line.

⭐ User Testimonials

Electronic Design Engineer – USA

“The curved side gives the LED a smoother glow, which looks more premium in our consumer product line.”

Industrial Controls Technician – UK

“Excellent visibility from multiple angles. Very reliable in control panels.”

Hardware Developer – Germany

“The compact size helped us reduce PCB area while still keeping a bright status indicator.”

⭐ Conclusion

The 2.0×3.0×4mm rectangular type LED lamp with one curved side delivers an excellent balance of compact design, bright illumination, and aesthetic appeal. Its enhanced viewing angle, energy efficiency, and rugged reliability make it suitable for a wide range of applications, from industrial control systems to compact consumer electronics.

Whether used as a single indicator or integrated into a bar-graph or multi-LED array, this LED offers dependable performance and modern visual quality.

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