LTST-C191KRKT
Manufacturer
Model
LTST-C191KRKT
Category
The Lite-On LTST-C191KRKT is a compact 631nm red LED designed for reliable status indication across industrial and consumer electronics. Its 0603 packaging and 20mA forward current make it suitable for space-constrained applications, while the -55°C to +85°C operating range ensures robust performance in extreme environments. The 130° viewing angle and 75mW output provide clear visual feedback in control panels and devices. Engineers should prioritize proper soldering techniques and thermal management to maximize lifespan, and consider alternative models with higher viewing angles or optical intensity for specialized needs.
Reference Pricing
Reference Stock
Specifications
| Forward Current | 20mA |
| Forward Voltage | 2.0V - 2.4V |
| Lifetime | 1000 hours |
| Luminous Color | AlInGaP Red |
| Luminous Efficiency | 54.0 mcd |
| Operating Temperature Range | -55°C to + 85°C |
| Package Material | I.C. compatible |
| Package Type | 0603 |
| Radiation Angle | 130° |
| Rated Voltage | 75mW |
Function And Role
Core Function
LED indication and status signaling
Key Characteristics
- 20mA forward current
- 631nm peak wavelength
- 54mcd luminous intensity
- 130° viewing angle
- 75mW power rating
- 2V forward voltage
- -55°C to +85°C operating temperature range
- colorless transparent lens
Application Domains
Basic Scenarios
- Appliance status indicators
- Equipment power indicators
- Consumer electronics
- Industrial control panels
Extended Scenarios
- Automotive dashboard displays
- Medical device indicators
- Optical communication links
- Environmental monitoring systems
Precautions
| Soldering | Use 300-350°C soldering temperature with 3-5 seconds contact time |
| Current Limit | Max 25mA continuous current (reduces lifespan beyond 20mA) |
| Voltage Limit | Max 2.5V reverse voltage (risk of destruction) |
| Thermal Management | Thermal resistance 35°C/W requires proper heat sinking |
| Storage | Store in <10% relative humidity, <40°C environment |
| Risk Warnings |
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Alternative Model Params
- Forward current (18-22mA)
- Wavelength (625-635nm range)
- Viewing angle (120-140°)
- Power (50-100mW)
- Voltage (1.8-2.2V)
- Operating temperature (-40°C to +100°C)
Design Recommendations
| Layout | Place 10-15mil clearance from heat sources |
| Thermal | Use 0.3mm thick copper pad for heat dissipation |
| Compatibility | Verify with 0603 footprint designs |
| Testing | Validate at 85°C/85% RH for 1000 hours |
Market Positioning
| Strengths |
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| Weaknesses |
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