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LTST-C191TBKT-5A

Ultra-thin InGaN blue SMD LED, 0603, 470nm dominant, 15mcd, 2.8V, 130° viewing angle, 0.55mm height

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Manufacturer Part：

LTST-C191TBKT-5A

Package：

0603 (1.60 x 0.80 x 0.55 mm)

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Description

Product Overview

The LTST-C191TBKT-5A is an ultra-thin InGaN blue SMD LED manufactured by Lite-On Technology. Packaged in a compact 0603 (1608 metric) chip LED package with an extra-thin profile of only 0.55mm height, this device delivers a typical luminous intensity of 15mcd at 5mA with a dominant wavelength of 470nm to 475nm. Its wide 130-degree viewing angle and water-clear lens make it ideal for backighting, status indication, and general-purpose illumination in space-constrained applications.

Key Specifications

LED Color Blue (InGaN)
Dominant Wavelength 470nm to 475nm
Peak Wavelength 468nm
Luminous Intensity (Typical) 15mcd @ 5mA
Forward Voltage (Typical) 2.8V @ 5mA
Forward Voltage (Max) 3.05V @ 5mA
Continuous Forward Current (Max) 20mA
Peak Forward Current (Max) 100mA (1/10 duty, 0.1ms pulse)
Power Dissipation (Max) 120mW
Viewing Angle 130°
Reverse Current (Max) 100µA @ VR=5V
Spectral Line Half-Width 25nm
Package 0603 (1.60 x 0.80 x 0.55 mm)
Lens Water Clear, Rectangular
Operating Temperature -20°C to +80°C

Features

  • Extra-thin 0.55mm profile ideal for low-clearance designs
  • Ultra-bright InGaN blue chip LED with 15mcd typical intensity
  • Wide 130-degree viewing angle for uniform illumination
  • Compact 0603 (1608 metric) package for space-saving designs
  • IC compatible with low 5mA test current
  • RoHS compliant, green product
  • Compatible with automatic placement equipment and IR reflow soldering
  • Supplied on 8mm tape, 7-inch diameter reels

Applications

  • Backlighting for LCD displays, keypads, and switches
  • Status indication and signal LEDs in consumer electronics
  • General-purpose illumination in portable and handheld devices
  • Industrial equipment front-panel indicators
  • Automotive interior lighting and dashboard indicators

The LTST-C191TBKT-5A from Lite-On Technology is an ultra-thin InGaN blue chip LED designed for applications demanding compact form factors and reliable blue light emission. Featuring a dominant wavelength of 470nm to 475nm and a peak wavelength of 468nm, this LED delivers consistent blue color output with a typical luminous intensity of 15mcd at just 5mA forward current. The ultra-thin 0.55mm package height makes it particularly suitable for low-clearance and space-constrained designs such as thin-profile consumer electronics, wearable devices, and miniaturized instrumentation. The wide 130-degree viewing angle ensures uniform light distribution across the viewing area. Packaged in the industry-standard 0603 (1608 metric) footprint, the LTST-C191TBKT-5A is compatible with standard surface-mount assembly processes and automated pick-and-place equipment.

The LTST-C191TBKT-5A utilizes an InGaN (Indium Gallium Nitride) semiconductor chip as its light-emitting element. When forward-biased at a typical voltage of 2.8V, electrons in the InGaN active layer recombine with holes at the p-n junction, releasing energy as photons in the blue spectrum with a peak emission at 468nm. The water-clear rectangular lens encapsulates the chip and provides optical coupling with a wide 130-degree half-angle, ensuring broad and even light distribution. The device is designed for continuous operation at up to 20mA forward current, with a peak rating of 100mA for pulsed applications. The spectral line half-width of 25nm indicates a relatively narrow emission band, contributing to the vivid and saturated blue color appearance. Proper ESD handling precautions are recommended during assembly, as InGaN LEDs are sensitive to electrostatic discharge.

Pin Name Type Function
1 Anode (+) Input Positive terminal; connect to forward bias supply through current-limiting resistor
2 Cathode (-) Ground Negative terminal; connect to circuit ground
  • LCD display backlighting in smartphones, tablets, and portable electronics requiring thin-profile blue LEDs
  • Status and indicator LEDs on consumer electronics front panels, routers, and set-top boxes
  • Keypad and switch backlighting in industrial control panels and handheld instruments
  • General illumination in wearable devices and fitness trackers with height constraints
  • Interior automotive lighting including dashboard indicators and cabin ambient lighting
Manufacturer Part Number Package Notes
Lite-On LTST-C191TBKT 0603 Same LED, standard tape packaging without -5A suffix
Samsung SPHWH2D3N01YE4 0603 Blue LED, 470nm, similar form factor
Kingbright APHHS1005QBDZGKC 0402 Smaller footprint alternative, blue 470nm
Rohm SML-D12M1WT86 0603 Blue LED, 468nm, similar package
Vishay VLMU1500-GS08 0603 Blue LED, 470nm, comparable performance
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Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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