QTLP652C2TR Red LED 1206 SMD Equivalent & Substitute Parts

Part Overview

The QTLP652C2TR is a red 630nm 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 identification of suitable substitute components essential for ongoing design support and production continuity. The component features a 2V forward voltage, 20mA test current, and 9mcd brightness rating with a 130° viewing angle in a compact 3.20mm × 1.60mm form factor.

Substiute Parts

QTLP652C2TR

onsemiIn Stock: 892QTLP652C2TR Datasheet

Current PartRFQ

156120RS75300

Würth ElektronikIn Stock: 8571156120RS75300 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the QTLP652C2TR is determined by strict alignment of the following critical parameters:

• Package / Case: 1206 (3216 Metric) surface mount configuration
• Mounting Type: Surface Mount, Bottom Entry
• Color: Red
• Voltage - Forward (Vf): 2V nominal
• Current - Test: 20mA
• Lens Configuration: Round with Flat Top, Colorless, Clear transparency
• Lens Size: 1.60mm Dia
• Physical Dimensions: 3.20mm L × 1.60mm W

The substitute part 156120RS75300 from Würth Elektronik meets all mandatory substitution criteria. While this part exhibits higher brightness (60mcd versus 9mcd) and a slightly extended viewing angle (140° versus 130°), these represent performance enhancements rather than incompatibilities. The dominant wavelength shift from 630nm to 624nm remains within the red spectrum classification and does not constitute a functional barrier to substitution in indication applications.

Parameter Comparison

Engineering Selection Recommendations

The 156120RS75300 from Würth Elektronik is a direct functional substitute for the obsolete QTLP652C2TR. The substitute part maintains identical package geometry, mounting configuration, electrical operating parameters (2V forward voltage, 20mA test current), and physical footprint compatibility.

The substitute part carries active product status with ROHS3 compliance certification, providing supply chain continuity and regulatory alignment for new production. The increased brightness rating (60mcd) and extended viewing angle (140°) represent performance improvements suitable for indication applications. The maximum height increase from 1.10mm to 1.40mm remains within typical PCB assembly tolerances for 1206 components.

The MSL rating difference (MSL 1 versus MSL 3) reflects standard moisture handling requirements for the substitute part and does not preclude substitution in standard manufacturing environments with appropriate moisture control protocols.

Frequently Asked Questions (FAQ)

Q: Can the 156120RS75300 be used as a direct replacement for the QTLP652C2TR in existing PCB designs?

A: Yes. Both components share identical 1206 (3216 Metric) package geometry, bottom entry surface mount configuration, and electrical operating parameters (2V forward voltage, 20mA test current). PCB footprints and solder pad layouts are compatible without modification.

Q: What is the significance of the brightness difference between the two parts?

A: The QTLP652C2TR operates at 9mcd while the 156120RS75300 operates at 60mcd. In indication applications, the higher brightness of the substitute part provides enhanced visibility without requiring circuit modifications. If the original design relied on current-limiting resistors calibrated for the lower brightness, the substitute will produce a brighter indication at identical drive currents.

Q: Does the wavelength shift from 630nm to 624nm affect color perception?

A: Both wavelengths fall within the red spectrum classification. The shift from 630nm to 624nm represents a minor adjustment within the red color range and does not constitute a color change. Visual perception of both components will register as red indication.

Q: What is the impact of the 0.30mm height increase?

A: The QTLP652C2TR has a maximum height of 1.10mm while the 156120RS75300 has a maximum height of 1.40mm. This 0.30mm difference is within standard PCB assembly tolerances for 1206 components and does not typically impact board-level clearance or component placement in standard designs.

Q: How does the MSL rating difference affect handling and storage?

A: The QTLP652C2TR carries MSL 1 (Unlimited) while the 156120RS75300 carries MSL 3 (168 Hours). MSL 3 requires moisture control during storage and handling, with a maximum floor life of 168 hours at specified temperature and humidity conditions before reflow soldering. Standard manufacturing environments with moisture control protocols accommodate MSL 3 components without additional process modifications.

Q: Is the substitute part RoHS compliant?

A: Yes. The 156120RS75300 carries ROHS3 compliance certification. The original QTLP652C2TR RoHS status is not specified in the available documentation.