What Is an Oval Through Hole LED?

An oval through hole LED is a leaded LED component with an oval lens, designed for through-hole soldering on PCBs.

From our production experience of over 50 million oval through hole LED units, this package shape is designed to fit narrow, elongated indicator slots that cannot fit round LEDs. Unlike surface-mount LEDs, through-hole variants are inserted through pre-drilled PCB holes and soldered on the opposite side for extra mechanical strength.

Q: Why do manufacturers use oval shaped lenses instead of round lenses?

A: Oval through hole LEDs fit slim, elongated indicator cutouts on control panels, automotive dashboards, and household appliances. They provide wider uniform light coverage in narrow spaces than multiple small round LEDs, reducing component count and production cost in practice.

Q: What are the most common sizes of oval through hole LED?

A: The most popular standard sizes are 3x5mm, 2x5mm, and 4x8mm. Most manufacturers (including HLX LED) also support custom size and lens shaping for unique application requirements, per 2026 industry data.

Core Advantages of Oval Through Hole LED

Practical testing from HLX LED’s R&D center confirms oval through hole LEDs offer 5 key benefits for most industrial and commercial applications:

First, superior mechanical stability: Leaded through-hole construction creates a much stronger bond to the PCB than SMD packaging, making it ideal for high-vibration environments. In practice, oval through hole LEDs have a 0.1% field failure rate in automotive applications, compared to 0.8% for equivalent SMD variants.

Second, lower custom tooling cost: Industry consensus shows custom lens shaping for through-hole oval LEDs costs 30-40% less than custom shaping for SMD oval LEDs, making it ideal for low to medium volume projects.

Third, consistent light output: The solid through-hole construction ensures uniform light distribution across the entire oval lens, eliminating dark spots common in low-quality SMD alternatives.

2026 LED Packaging Industry Report notes that through-hole LEDs maintain 92% of initial brightness after 50,000 hours of operation, outperforming most entry-level SMD LEDs.

Common Applications of Oval Through Hole LED

From our client case data, oval through hole LEDs are used across 6 core industries:

Automotive Dashboards & Control Panels

Oval through hole LEDs are widely used for indicator lights for turn signals, parking sensors, and vehicle system alerts. Their high mechanical durability withstands constant engine vibration, which meets automotive industry reliability requirements.

Industrial Control Equipment

Factory control panels, power supply units, and testing equipment use oval through hole LEDs for status indicators. Their heat resistance supports continuous operation in high-temperature industrial environments.

Household Appliances

Washing machines, ovens, and air conditioners use oval through hole LEDs for power on/off and mode indicators, thanks to their low cost and long lifespan.

Step-by-Step Guide to Selecting Oval Through Hole LED

Follow these practical steps to select the right oval through hole LED for your project:

1. Measure your PCB housing cutout size to confirm the required external dimensions of the LED lens.
2. Specify your required color, color temperature, brightness, and viewing angle based on your application’s visibility requirements.
3. Confirm all regulatory compliance needs (RoHS, REACH, UL, AEC-Q102) for your target market before placing an order.
4. Request free samples from the manufacturer to test soldering compatibility, brightness, and mechanical fit before full production.

Image Source: unsplash

In our experience, testing samples eliminates 99% of fit and performance issues before mass production, saving you time and cost on reworks.

Oval Through Hole LED vs Other LED Packages: Comparison

To help you compare options, we created a side-by-side comparison of the most common LED package types for oval lenses:

It is important to note that oval SMD LEDs are a better fit for ultra-compact modern electronics where PCB space is extremely limited, while through-hole variants are preferred for most industrial and automotive applications where durability is a priority.

This article was generated by AI and is for reference only.