QTLP670CSTR Red LED 2-PLCC Equivalent & Substitute Parts

Part Overview

The QTLP670CSTR is an active red LED indication component manufactured by Everlight Electronics Co Ltd, designed for surface mount applications in 2-PLCC packaging. This discrete LED operates at 2V forward voltage with a 65mcd brightness rating and 632nm dominant wavelength, suitable for standard indicator applications requiring clear lens visibility and 120° viewing angle. The component is ROHS3 compliant and maintains active product status with 1044 units in current inventory.

Substitute parts are identified to address supply chain continuity, inventory availability, or specific application requirements where electrical and mechanical parameters remain compatible within defined tolerances.

Substiute Parts

QTLP670CSTR

Everlight Electronics Co LtdIn Stock: 1146QTLP670CSTR Datasheet

Current PartRFQ

AA3528SESK/J3

KingbrightIn Stock: 24671AA3528SESK/J3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the QTLP670CSTR are identified based on strict compatibility across the following critical parameters:

Package and Mechanical Compatibility: Both the main part and substitute must use 2-PLCC packaging with identical physical dimensions (3.20mm L x 2.80mm W, 2.10mm max height), round flat-top lens style, and 2.40mm lens diameter to ensure PCB footprint compatibility and mechanical fit.

Optical and Electrical Compatibility: Red color classification with wavelength in the 625-640nm range (dominant wavelength 625-632nm) ensures visual indication consistency. Forward voltage tolerance of 2.0-2.2V at 20mA test current maintains circuit compatibility with standard LED driver circuits. Viewing angle of 120° and clear lens transparency are required for consistent optical performance.

Surface Mount Configuration: All substitute parts must be surface mount components suitable for automated assembly processes.

Regulatory Compliance: ROHS3 compliance and MSL 3 rating are maintained across all qualified substitutes to ensure regulatory and environmental compatibility.

The substitute part AA3528SESK/J3 from Kingbright meets all critical substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - QTLP670CSTR (Everlight Electronics): This component is the specified part with active product status and confirmed inventory of 1044 units. It meets all ROHS3 compliance requirements and MSL 3 specifications. Selection is appropriate for applications requiring the specified 65mcd brightness rating and 632nm dominant wavelength.

Substitute Selection - AA3528SESK/J3 (Kingbright): This component qualifies as a direct substitute based on identical package, mechanical dimensions, and electrical operating parameters. The substitute maintains ROHS3 compliance and identical MSL 3 rating. The higher brightness rating of 450mcd versus 65mcd represents an increase in light output; this characteristic must be evaluated against specific application requirements. The forward voltage of 2.2V versus 2.0V falls within acceptable tolerance for standard LED driver circuits. Inventory availability of 24600 units provides supply chain advantage. Both components are active products with current manufacturing status.

Compliance Verification: Both parts maintain ROHS3 compliance and identical moisture sensitivity specifications, ensuring regulatory and environmental compatibility in equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can AA3528SESK/J3 be used as a direct replacement for QTLP670CSTR in existing PCB designs?

A: Yes. Both components use identical 2-PLCC packaging with matching physical dimensions (3.20mm L x 2.80mm W, 2.10mm height) and footprints. PCB layout compatibility is confirmed. The 0.2V increase in forward voltage (2.2V versus 2.0V) is within standard tolerance for LED driver circuits and does not require circuit redesign.

Q: What is the difference in brightness between these two parts?

A: The AA3528SESK/J3 provides 450mcd brightness compared to 65mcd for the QTLP670CSTR. This represents a 6.9x increase in light output. Applications requiring the lower brightness specification of the original part should account for this difference in visual intensity.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both QTLP670CSTR and AA3528SESK/J3 are ROHS3 compliant and maintain identical MSL 3 (168 Hours) moisture sensitivity ratings. Regulatory and environmental compliance is equivalent.

Q: What is the wavelength difference between these LEDs?

A: The QTLP670CSTR has a dominant wavelength of 632nm while the AA3528SESK/J3 has 625nm. Both fall within the red spectrum range and share an identical peak wavelength of 640nm. The 7nm difference in dominant wavelength produces a visually imperceptible color shift in standard red indication applications.

Q: Can these parts be used interchangeably in automated assembly processes?

A: Yes. Both components are surface mount devices in 2-PLCC packaging with identical dimensions and mounting characteristics. Automated pick-and-place equipment and reflow soldering processes are compatible with both parts without modification.

Q: What are the storage and handling requirements for these components?

A: Both parts carry MSL 3 rating with 168-hour floor life. Components must be stored in moisture-controlled environments and handled according to ESD precautions. Tape & Reel packaging is standard for both parts.

Q: Is the 0.2V forward voltage difference significant for circuit design?

A: The forward voltage difference of 0.2V (2.0V to 2.2V) is within normal tolerance for LED indicator circuits. Standard LED driver designs accommodate this range without requiring circuit modifications. Verify specific driver specifications if operating near voltage limits.