LTST-C190CKT Equivalent & Substitute Parts

Part Overview

The LTST-C190CKT is a red LED indication component manufactured by Lite-On Inc., configured as a discrete 0603 (1608 Metric) surface mount device. This part operates at 1.8V forward voltage with a 10mA test current and delivers 10mcd luminous intensity at 638nm dominant wavelength. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

LTST-C190CKT

Lite-On Inc.In Stock: 17278LTST-C190CKT Datasheet

Current PartRFQ

LTST-C190KDKT

Lite-On Inc.In Stock: 718LTST-C190KDKT Datasheet

MFR RecommendedRFQ

BR1111C-TR

Stanley Electric CoIn Stock: 19550BR1111C-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTST-C190CKT is determined by the following critical parameters:

Mandatory Matching Criteria:

• Package / Case: 0603 (1608 Metric)
• Mounting Type: Surface Mount
• Color: Red
• Wavelength range: Red spectrum (638nm–660nm dominant/peak)

Compatible Variation Parameters:

• Voltage - Forward (Vf): Tolerance range 1.7V–1.8V
• Current - Test: 10mA–20mA operational range
• Millicandela Rating: 10mcd–11.7mcd
• Viewing Angle: 130°–141°
• Lens Transparency: Clear or Diffused acceptable
• Height (Max): 0.80mm–0.90mm

Compliance Requirements:

• RoHS3 Compliant
• REACH Unaffected
• MSL rating compatible with storage conditions

Parameter Comparison

Engineering Selection Recommendations

LTST-C190KDKT (Lite-On Inc.)

This part is the manufacturer-recommended substitute from Lite-On Inc. It shares the same base product number (LTST-C190) and maintains identical RoHS3 compliance and MSL rating (3, 168 Hours). The part is currently in active production status, ensuring long-term availability. Detailed electrical and optical parameters are not specified in the available data; however, the shared base product designation indicates functional equivalence within the LTST-C190 series.

BR1111C-TR (Stanley Electric Co)

This substitute meets the core package and mounting requirements (0603/1608 Metric, surface mount). It operates within the acceptable voltage range (1.7V vs. 1.8V) and delivers comparable luminous intensity (11.7mcd vs. 10mcd). The dominant wavelength (647nm) remains within the red spectrum, and peak wavelength (660nm) matches the original. The viewing angle (136°–141°) exceeds the original specification (130°). However, this part carries a higher MSL rating (4, 72 Hours) compared to the original (3, 168 Hours), indicating reduced moisture tolerance during storage. The part is classified as obsolete. Both parts maintain ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can LTST-C190KDKT be used as a direct replacement for LTST-C190CKT?

A: Yes. LTST-C190KDKT is the manufacturer-recommended substitute from Lite-On Inc. and shares the same base product number. Both parts maintain identical RoHS3 compliance and MSL rating (3, 168 Hours). The part is in active production status.

Q: What are the key differences between BR1111C-TR and the original LTST-C190CKT?

A: BR1111C-TR operates at 1.7V forward voltage (0.1V lower than the original 1.8V) and requires 20mA test current (double the original 10mA). The dominant wavelength is 647nm compared to 638nm. The lens is diffused white rather than clear colorless. The MSL rating is higher (4 vs. 3), indicating reduced moisture tolerance. Both parts share the same 0603 package and surface mount configuration.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both LTST-C190KDKT and BR1111C-TR are ROHS3 compliant and REACH unaffected, matching the original part's compliance status.

Q: What is the significance of the MSL rating difference?

A: The original LTST-C190CKT carries MSL 3 (168 Hours), allowing 168 hours of exposure to 85°C/85% RH before baking is required. BR1111C-TR carries MSL 4 (72 Hours), requiring baking after 72 hours of exposure to the same conditions. This affects storage and handling procedures. LTST-C190KDKT maintains the original MSL 3 rating.

Q: Can BR1111C-TR be used in applications requiring the exact 1.8V forward voltage?

A: BR1111C-TR operates at 1.7V forward voltage. Circuit designs dependent on the exact 1.8V specification must account for this 0.1V difference in voltage drop calculations and current limiting resistor values.

Q: Are the optical characteristics of BR1111C-TR compatible with the original?

A: BR1111C-TR uses a diffused white lens compared to the original clear colorless lens. This affects light distribution and intensity profile. The dominant wavelength (647nm) differs from the original (638nm), though both remain in the red spectrum. The viewing angle is wider (136°–141° vs. 130°). Applications sensitive to specific light distribution patterns or wavelength should account for these differences.