The Original 5mm Yellow Diffused LED (Production Quality - Pack of 1000 Pcs) is a commercial-grade through-hole light-emitting diode engineered for high-volume PCB manufacturing, electronic instrumentation, and front-panel status indication. Encapsulated in a standard T-1 3/4 (5mm) yellow-tinted diffused epoxy resin lens, it integrates a high-efficiency GaAsP/GaP (or AlGaInP) semiconductor die that emits a vibrant, uniform 585nm–595nm amber-yellow light across a wide 60° viewing angle without harsh hotspots or central glare. Built with high-conductivity pure copper leadframes for optimal heat dissipation and high-integrity internal gold-wire bonding, these LEDs deliver consistent forward voltage and uniform optical luminous output across large production runs. They are widely utilized in industrial warning panels, standby power indicators, consumer appliances, telecommunication equipment, and educational electronics kits.

Specifications

• Product Type: 5mm (T-1 3/4) Yellow Diffused Through-Hole LED (Pack of 1000 Pieces)
• Lens Type / Appearance: 5mm Round Yellow-Tinted Diffused Epoxy Lens
• Emitted Light Color: Yellow
• Dominant Wavelength (λd): 585 nm to 595 nm (Peak Wavelength λp ≈ 590 nm)
• Semiconductor Material: GaAsP/GaP / AlGaInP
• Luminous Intensity (Iv): 60 mcd to 150 mcd (at IF = 20mA, uniform diffused distribution)
• Viewing Angle (2θ1/2): 60° (Wide-angle diffused emission)
• Forward Voltage Drop (VF): Typ. 2.0V to 2.2V / Max. 2.5V (at IF = 20mA)
• Continuous Forward Current (IF): 20mA (Nominal) / Max. 30mA (Absolute Maximum)
• Peak Pulse Forward Current (IFP): Up to 100mA (1/10 Duty Cycle, 0.1ms Pulse Width)
• Reverse Breakdown Voltage (VR): Min. 5.0V (at IR = 10µA)
• Reverse Leakage Current (IR): Max. 10µA (at VR = 5V)
• Power Dissipation (Pd): 75mW to 100mW (at Ta = 25°C)
• Electrostatic Discharge (ESD) Threshold: Up to 2000V (HBM)
• Lead Pitch / Spacing: Standard 2.54mm (0.1-inch)
• Lead Material & Plating: Pure Copper Alloy with Tin/Silver Electroplating for High Solderability
• Polarity Identification: Longer Lead: Anode (+), Shorter Lead & Flat Lens Rim: Cathode (-)
• Operating Temperature Range (Topr): -40°C to +85°C
• Storage Temperature Range (Tstg): -40°C to +100°C
• Lead Soldering Temperature: 260°C for max. 3 to 5 seconds (at 2mm distance from epoxy base)

Features

• Yellow Diffused Lens Design: Softens direct illumination into an evenly distributed yellow glow across a wide 60° viewing angle, eliminating harsh glare for front-panel warning and status indicators.
• Production-Grade Batch Consistency: Strict binning standards ensure tightly matched forward voltage (VF ~2.1V) and uniform luminous intensity across all 1000 units.
• High-Conductivity Copper Leads: Thick copper alloy leadframes provide efficient thermal conduction away from the semiconductor die, extending operational lifespan.
• Low Forward Voltage Drop: Operates at a low typical forward drop of 2.0V–2.2V, enabling direct driving from 3.3V and 5V microcontroller GPIO rails with minimal series resistance loss.
• Universal 2.54mm DIP Pitch: Standard T-1 3/4 footprint fits seamlessly into solderless breadboards, stripboards, automated PCB insertion equipment, and panel-mount LED clips.

Common Applications

• Industrial Control & Warning Panels: Caution, standby, intermediate state, and system alert pilot indicators.
• Telecom & Networking Hardware: Link activity, data transfer, and standby status indicators on modems and routers.
• Consumer Electronics & Appliances: Standby power lights, heater active indicators, and mode selection monitors.
• Microcontroller & Robotics Projects: Debug status indicators on Arduino, ESP32, Raspberry Pi, STM32, and CH32V boards.
• Signage & Backlighting: Ambient accent lighting and backlighting for custom pushbuttons and instrument dials.

Usage Tips

• Always Use a Current-Limiting Resistor: **Never connect the LED directly across a voltage source without a series current-limiting resistor**, as unconstrained current will destroy the internal LED die immediately.
• Series Resistor Calculation Formula: R_series = (Vsupply - VF) / IF.
  • From a +3.3V GPIO Rail (at IF = 10mA, VF = 2.1V): R = (3.3V - 2.1V) / 0.01A = 120Ω (Standard 120Ω or 150Ω, 1/8W resistor recommended).
  • From a +5.0V Logic Rail (at IF = 15mA, VF = 2.1V): R = (5.0V - 2.1V) / 0.015A = 193Ω (Standard 200Ω or 220Ω, 1/4W resistor recommended).
  • From a +12.0V Supply (at IF = 15mA, VF = 2.1V): R = (12.0V - 2.1V) / 0.015A = 660Ω (Standard 680Ω or 750Ω, 1/4W resistor recommended).
  • From a +24.0V Industrial Rail (at IF = 15mA, VF = 2.1V): R = (24.0V - 2.1V) / 0.015A = 1460Ω (Standard 1.5kΩ, 1/2W power resistor recommended).
• Polarity Identification: Connect the longer lead to the positive rail (Anode +) and the shorter lead to ground or the low-side switch (Cathode -). If leads are already trimmed, the Cathode side is identified by the flat notched edge on the rim of the epoxy base.
• Direct 3.3V MCU Pin Driving: With a ~2.1V forward voltage drop, standard 3.3V microcontrollers (e.g., ESP32, STM32, CH32V) can directly source 5mA–10mA through a 120Ω to 220Ω resistor without overloading output pins.
• Soldering Recommendations: Keep a minimum clearance of 2mm between the soldering iron tip and the bottom of the epoxy body. Limit soldering contact time to under 3–5 seconds at 260°C to protect the internal gold bonding wire from thermal stress.