LTST-C930CBKT Equivalent & Substitute Parts

Part Overview

The LTST-C930CBKT is a blue 470nm LED indication component manufactured by Lite-On Inc., designed for surface mount applications in the 1209 (3224 Metric) package. This discrete LED operates at a typical forward voltage of 3.7V with a test current of 20mA, delivering 180mcd brightness with a 25° viewing angle. The component features a clear, domed round lens with 1.80mm diameter.

The LTST-C930CBKT is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this LED specification.

Key Parameters

Parameter	Value
Manufacturer	Lite-On Inc.
Color	Blue
Wavelength - Dominant	470nm
Wavelength - Peak	468nm
Lens Style	Round with Domed Top
Lens Size	1.80mm Dia
Lens Transparency	Clear
Package / Case	1209 (3224 Metric)
Mounting Type	Surface Mount
Size / Dimension	3.20mm L x 2.40mm W
Height (Max)	2.40mm
Current - Test	20mA
Viewing Angle	25°
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the LTST-C930CBKT is determined by strict alignment of the following parameters:

Color and Wavelength: Blue 470nm dominant wavelength with 468nm peak wavelength
Optical Properties: Clear lens, round domed top configuration, 1.80mm lens diameter, 25° viewing angle
Package Specification: 1209 (3224 Metric) surface mount package
Physical Dimensions: 3.20mm L x 2.40mm W, 2.40mm maximum height
Electrical Operating Conditions: 20mA test current
Environmental Classification: MSL 3 (168 Hours)

The LTST-C930TBKT meets all these criteria and qualifies as a direct substitute. Both components share identical optical, mechanical, and environmental specifications. Variations in forward voltage (Vf) and millicandela rating do not disqualify substitution when the application circuit accommodates the electrical differences.

Parameter Comparison

Parameter	LTST-C930CBKT (Main)	LTST-C930TBKT (Substitute)
Manufacturer	Lite-On Inc.	Lite-On Inc.
Product Status	Obsolete	Active
Color	Blue	Blue
Wavelength - Dominant	470nm	470nm
Wavelength - Peak	468nm	468nm
Lens Style	Round with Domed Top	Round with Domed Top
Lens Size	1.80mm Dia	1.80mm Dia
Lens Transparency	Clear	Clear
Package / Case	1209 (3224 Metric)	1209 (3224 Metric)
Mounting Type	Surface Mount	Surface Mount
Size / Dimension	3.20mm L x 2.40mm W	3.20mm L x 2.40mm W
Height (Max)	2.40mm	2.40mm
Current - Test	20mA	20mA
Viewing Angle	25°	25°
Voltage - Forward (Vf) (Typ)	3.7V	3.4V
Millicandela Rating	180mcd	450mcd
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The LTST-C930TBKT is the qualified substitute for the obsolete LTST-C930CBKT. Selection of the substitute is supported by the following factors:

Product Status: The LTST-C930TBKT carries Active product status, ensuring ongoing availability and manufacturer support, whereas the main part is classified as Obsolete.

Compliance and Certifications: Both components maintain identical REACH Unaffected status and EAR99 ECCN classification. The LTST-C930TBKT additionally carries RoHS3 Compliance certification, providing enhanced environmental regulatory alignment.

Electrical and Optical Compatibility: The substitute maintains identical wavelength specifications (470nm dominant, 468nm peak), lens configuration, and package geometry. The forward voltage difference (3.4V vs. 3.7V) and increased brightness (450mcd vs. 180mcd) are within acceptable substitution parameters for indication applications and require circuit-level evaluation based on specific application requirements.

Supply Chain Continuity: The LTST-C930TBKT maintains significantly higher inventory availability (15,400 pcs vs. 780 pcs), supporting production continuity and reducing procurement risk.

Frequently Asked Questions (FAQ)

Q: Can the LTST-C930TBKT be used as a direct replacement for the LTST-C930CBKT in existing designs?

A: Yes. Both components share identical optical, mechanical, and package specifications. The forward voltage difference (0.3V lower on the substitute) and increased brightness require circuit validation to confirm compatibility with existing current-limiting resistor values and brightness expectations.

Q: What is the primary difference between these two parts?

A: The LTST-C930TBKT features a lower typical forward voltage (3.4V vs. 3.7V) and higher brightness output (450mcd vs. 180mcd). The main part is obsolete; the substitute is in active production.

Q: Are the physical dimensions and package specifications identical?

A: Yes. Both components use the 1209 (3224 Metric) surface mount package with identical dimensions (3.20mm L x 2.40mm W, 2.40mm height) and lens specifications (1.80mm diameter, clear, round domed top).

Q: What packaging options are available for the substitute part?

A: The LTST-C930TBKT is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Q: Are there any compliance or regulatory differences?

A: The LTST-C930TBKT carries RoHS3 Compliance certification in addition to the REACH Unaffected status shared with the main part. Both maintain EAR99 ECCN classification.

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