QTLP652C3TR Yellow 590nm LED Indication - 1206 SMD Equivalent & Substitute Parts

Part Overview

The QTLP652C3TR is a yellow 590nm LED indication component manufactured by onsemi in a 1206 (3216 Metric) surface mount package with bottom entry configuration. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The component operates at 2V forward voltage with a 20mA test current and provides 5mcd luminous intensity with a 130° viewing angle.

Substiute Parts

QTLP652C3TR

onsemiIn Stock: 928QTLP652C3TR Datasheet

Current PartRFQ

156120YS75300

Würth ElektronikIn Stock: 7894156120YS75300 Datasheet

SimilarRFQ

APTL3216SYCK

KingbrightIn Stock: 12551APTL3216SYCK Datasheet

SimilarRFQ

QTLP652C3TR

onsemiIn Stock: 928QTLP652C3TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QTLP652C3TR is determined by the following mandatory parameters:

• Color: Yellow
• Wavelength - Dominant: 590nm (±5nm tolerance acceptable)
• Voltage - Forward (Vf) (Typ): 2V
• Current - Test: 20mA
• Package / Case: 1206 (3216 Metric)
• Mounting Type: Surface Mount

The identified substitute parts meet these core electrical and mechanical requirements. Variations in millicandela rating, viewing angle, and product status are secondary considerations that do not disqualify substitution but may affect circuit performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both 156120YS75300 (Würth Elektronik) and APTL3216SYCK (Kingbright) are active product alternatives to the obsolete QTLP652C3TR. Both substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The 156120YS75300 provides higher luminous intensity (80mcd) with a wider viewing angle (140°) and maintains bottom entry mounting configuration. The APTL3216SYCK offers significantly higher luminous intensity (350mcd) with a narrower viewing angle (70°) and standard surface mount configuration without bottom entry specification.

Height variation exists between options: the original part and APTL3216SYCK measure 1.10mm maximum height, while 156120YS75300 measures 1.40mm maximum height. Moisture sensitivity differs, with the original part rated MSL 1 (Unlimited) compared to MSL 3 (168 Hours) for both substitutes.

Frequently Asked Questions (FAQ)

Q: Can the 156120YS75300 directly replace the QTLP652C3TR?

A: Yes. Both parts share identical forward voltage (2V), test current (20mA), dominant wavelength (590nm ±1nm), package (1206), and surface mount bottom entry mounting. The 156120YS75300 is active and ROHS3 compliant. Height difference is 0.30mm (1.40mm vs 1.10mm), which may require PCB layout verification for clearance-critical applications.

Q: Can the APTL3216SYCK directly replace the QTLP652C3TR?

A: Yes. Both parts share identical forward voltage (2V), test current (20mA), dominant wavelength (590nm), package (1206), and height (1.10mm). The APTL3216SYCK is active and ROHS3 compliant. Mounting type differs: APTL3216SYCK is standard surface mount without bottom entry specification. Viewing angle is narrower (70° vs 130°), which affects light distribution characteristics.

Q: What is the significance of the wavelength difference between 589nm and 590nm?

A: The wavelength difference of 1nm between 156120YS75300 (589nm dominant) and the original part (590nm dominant) is within acceptable tolerance for yellow LED indication applications and produces visually indistinguishable color output.

Q: How does the millicandela rating difference affect substitution?

A: The original QTLP652C3TR provides 5mcd, while 156120YS75300 provides 80mcd and APTL3216SYCK provides 350mcd. Higher millicandela ratings produce brighter indication. Circuit design must accommodate increased brightness through resistor adjustment or current limiting modifications if the original design relied on the lower 5mcd output.

Q: What is the impact of viewing angle differences?

A: The original part provides 130° viewing angle. The 156120YS75300 offers 140° (wider), while APTL3216SYCK offers 70° (narrower). Viewing angle affects the angular range over which the LED appears bright. Applications requiring wide-angle visibility should prioritize 156120YS75300 or the original specification.

Q: Are there packaging or moisture sensitivity concerns?

A: The original part is rated MSL 1 (Unlimited), while both substitutes are rated MSL 3 (168 Hours). MSL 3 requires moisture bake-out procedures if components are exposed to humidity for extended periods before reflow soldering. Packaging format differs: original is unspecified, 156120YS75300 is Tape & Reel, and APTL3216SYCK is Chip LED format.