L-53SGC LED Lamp Specifications and Features: Comprehensive Guide for SA Makers

Overview: What is the L-53SGC LED Lamp?

The L-53SGC is a widely used 5mm through-hole green LED, popular among South African students, hobbyists, and professionals for indicator circuits, panels, and development boards. Manufactured by Lite-On and distributed via component partners like Communica, its robust specs and reliability make it a staple in electronics labs and classrooms.

Key Specifications Table

Electrical & Optical Standards

• Typical operating voltage: 2.0 - 2.2 V at 20 mA
• Maximum continuous forward current: 30 mA
• Reverse voltage (max): 5 V (avoid exceeding to prevent breakdown)
• Standard lead orientation: long lead = anode (+), short lead = cathode (-)

For most microcontroller and breadboard applications, the L-53SGC works reliably with standard indicator resistor values and can be easily paired with GPIO outputs from 3.3 V or 5 V logic sources.
If you're sourcing for education or prototyping in South Africa, consider Communica's stocks of Lite-On and compatible brands, with VAT-invoiced supply and branch collection options.

Basic Application Example & Pinout

Here's a simple diagram showing how to connect the L-53SGC in series with a current-limiting resistor to a microcontroller output:

(Vcc)
  |
 [R]  (e.g. 150Ohm)
  |
 [LED: L-53SGC] (long lead = anode, short = cathode)
  |
GND

For a 5 V supply, a 150 Ohm resistor gives about 20 mA of current (see calculation below). For 3.3 V logic, adjust the resistor value for the desired brightness and safe current.

Resistor Value Calculation Example

To ensure long LED lifetime and proper brightness, always use a current-limiting resistor. The value can be calculated with Ohm's Law:

Formula:

R = (Vsupply - VF) / IF

Example (South Africa context):
For a common 5 V breadboard PSU:

• Supply voltage (V_supply): 5 V
• LED forward voltage (V_F): 2.1 V (typical for L-53SGC)
• Desired LED current (I_F): 20 mA (0.02 A)

R = (5 V - 2.1 V) / 0.02 A = 145 Ohm
Choose the next highest standard resistor value: 150 Ohm (the LED will run safely and visibly bright).

Troubleshooting & Best Practices

• LED not lighting? Double-check polarity: the longer lead is positive (anode).
• If brightness is very low, check your resistor value-it may be too high.
• Avoid exceeding 30 mA, as excess current will shorten life or immediately damage the LED.
• On group projects or larger panels, consider series vs parallel wiring and individual resistors for uniform brightness.

Popular Applications

• Board indicators and status lights in microcontroller kits (Arduino, Raspberry Pi GPIO)
• Panel mount indicators for test rigs or field boxes
• Education breadboard prototyping in STEM curricula
• Industrial maintenance replacements for legacy panels

For further exploration, browse Communica's LED range or view Lite-On and compatible brands in stock for quick procurement.

Sources

• Lite-On L-53SGC Official Datasheet (PDF)
• Communica - LEDs Category
• Communica Branches & Trading Hours
• 5mm LED Reference Guide - SparkFun