LTST-C930UBKT Equivalent & Substitute Parts

Part Overview

The LTST-C930UBKT is a blue LED indication component manufactured by Lite-On Inc., designed for discrete surface mount applications. This part operates at 3.8V forward voltage with a dominant wavelength of 466nm and delivers 60mcd luminous intensity. The product is currently obsolete, making identification of compatible substitute components essential for ongoing design support and production continuity.

Substiute Parts

LTST-C930UBKT

Lite-On Inc.In Stock: 857LTST-C930UBKT Datasheet

Current PartRFQ

APD3224QBC/D-F01

KingbrightIn Stock: 10495APD3224QBC/D-F01 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTST-C930UBKT is determined by the following critical parameters:

Physical Compatibility: Package dimensions (3.20mm L x 2.40mm W x 2.40mm H max) and mounting type (Surface Mount) must match to ensure PCB layout compatibility.

Optical Characteristics: Blue color specification with dominant wavelength in the 460-470nm range maintains functional equivalence for indication applications.

Electrical Parameters: Forward voltage (Vf) tolerance and test current (20mA) define circuit compatibility. Substitute parts must operate within acceptable voltage ranges for the application circuit.

Luminous Intensity: Millicandela rating determines visibility performance. Substitutes with equal or greater brightness maintain or improve functional performance.

Environmental Compliance: Moisture Sensitivity Level (MSL) and regulatory certifications (REACH, RoHS) must meet or exceed the original specification.

The APD3224QBC/D-F01 qualifies as a substitute based on matching physical dimensions, surface mount configuration, blue wavelength specification, compatible electrical parameters, and superior luminous intensity with active product status.

Parameter Comparison

Engineering Selection Recommendations

The APD3224QBC/D-F01 is the designated substitute for the obsolete LTST-C930UBKT based on the following factors:

Product Status: The APD3224QBC/D-F01 maintains active product status with 10,391 units in stock, ensuring long-term availability compared to the obsolete LTST-C930UBKT.

Physical Compatibility: Both components share identical footprint dimensions (3.20mm L x 2.40mm W x 2.40mm H max) and surface mount configuration, enabling direct PCB layout compatibility without redesign.

Optical Equivalence: Dominant wavelength separation of 1nm (466nm vs 465nm) falls within standard blue LED specification tolerances for indication applications.

Electrical Compatibility: Forward voltage difference of 0.5V (3.8V vs 3.3V) requires circuit evaluation. Applications with series resistor current limiting accommodate this variance. Direct voltage-source applications may require resistor adjustment.

Performance Enhancement: The APD3224QBC/D-F01 delivers 900mcd versus 60mcd, providing 15x greater luminous intensity while maintaining identical test current (20mA). This enhancement improves visibility without circuit modification in current-limited designs.

Regulatory Compliance: Both components meet MSL 3 (168 Hours) moisture sensitivity requirements. The APD3224QBC/D-F01 carries ROHS3 compliance certification, exceeding the original specification.

Frequently Asked Questions (FAQ)

Q: Can the APD3224QBC/D-F01 replace the LTST-C930UBKT directly without circuit modification?

A: Physical and optical compatibility is confirmed. Electrical compatibility depends on circuit design. Current-limiting designs (series resistor) accommodate the 0.5V forward voltage difference. Voltage-source applications require resistor recalculation to maintain specified test current.

Q: What is the significance of the 900mcd versus 60mcd brightness difference?

A: The APD3224QBC/D-F01 provides substantially higher luminous intensity. In current-limited circuits, this improves visibility without additional power consumption. In voltage-source circuits, resistor adjustment may be necessary to maintain original brightness if required by application specification.

Q: Are the package dimensions truly identical?

A: Both components measure 3.20mm L x 2.40mm W x 2.40mm H maximum. The LTST-C930UBKT uses 1209 (3224 Metric) package designation, while the APD3224QBC/D-F01 uses 2-SMD, No Lead designation. These represent equivalent physical specifications for the same footprint.

Q: Does the 5° viewing angle difference (25° vs 20°) affect compatibility?

A: The APD3224QBC/D-F01 has a narrower viewing angle. Applications requiring wide-angle visibility should evaluate this parameter. For standard indication applications with centered viewing, this difference is typically acceptable.

Q: What is the impact of the 1nm wavelength difference (466nm vs 465nm)?

A: This 1nm separation is within standard blue LED specification tolerances and produces no perceptible color difference in indication applications. Both wavelengths fall within the blue spectrum range.

Q: Is the APD3224QBC/D-F01 available in the same packaging format?

A: The APD3224QBC/D-F01 is available in Cut Tape (CT) and Digi-Reel packaging. The LTST-C930UBKT packaging format is not specified in the provided data. Confirm packaging requirements with procurement specifications.