QTLP9124ZR Equivalent & Substitute Parts Reference

Part Overview

The QTLP9124ZR is a green LED indication component manufactured by Everlight Electronics Co Ltd, configured as a 2.1V discrete surface mount device in a 2-SMD Z-Bend package. This part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain compatibility across optical, electrical, and mechanical parameters while meeting current product availability and compliance requirements.

Substiute Parts

QTLP9124ZR

Everlight Electronics Co LtdIn Stock: 783QTLP9124ZR Datasheet

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EASZ2025GA1

Everlight Electronics Co LtdIn Stock: 1144EASZ2025GA1 Datasheet

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CMD9121VGCTR10

Visual Communications Company - VCCIn Stock: 2181CMD9121VGCTR10 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the QTLP9124ZR are identified based on strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Package configuration: 2-SMD, Z-Bend
• Mounting type: Surface Mount
• Lens size: 1.90mm Dia
• Lens style: Round with Domed Top
• Lens transparency: Clear
• Viewing angle: 25°
• Physical dimensions: 2.50mm L x 2.00mm W
• Height (Max): 3.00mm
• Forward voltage (Vf): 2.1V ±tolerance
• Test current: 20mA

Optical Compatibility Parameters:

• Color: Green (primary specification)
• Wavelength - Peak: 585nm (±tolerance range)
• Millicandela rating: 50mcd

Two substitute parts meet these criteria with documented compatibility:

1. CMD9121VGCTR10 (Visual Communications Company - VCC): Active product status, identical green color, matching 2.1V forward voltage, 50mcd rating, and 2-SMD Z-Bend package. Peak wavelength 565nm falls within acceptable green LED spectrum range. RoHS3 compliant with MSL 3 rating.

2. EASZ2025GA1 (Everlight Electronics Co Ltd): Active product status, same manufacturer as original part, matching 2-SMD Z-Bend package and physical dimensions. Yellow-Green color (573nm dominant wavelength) represents optical variant within green spectrum family. Forward voltage 2V is compatible with 2.1V specification tolerance. RoHS3 compliant.

Parameter Comparison

Engineering Selection Recommendations

CMD9121VGCTR10 Selection Criteria:

This substitute provides the closest electrical and optical match to the QTLP9124ZR. The part maintains identical forward voltage (2.1V), millicandela rating (50mcd), viewing angle (25°), and physical package dimensions. Peak wavelength of 565nm remains within the green LED spectrum classification. Active product status ensures ongoing availability. RoHS3 compliance and MSL 3 rating match the original specification. The Bottom Entry mounting variant does not affect compatibility with standard surface mount assembly processes. This part is suitable for direct substitution in applications where green LED indication at 50mcd intensity is required.

EASZ2025GA1 Selection Criteria:

This substitute offers compatibility through the same manufacturer (Everlight Electronics Co Ltd) and identical 2-SMD Z-Bend package configuration. Forward voltage of 2V is compatible with the 2.1V specification within standard LED tolerance ranges. The Yellow-Green color classification (573nm dominant wavelength, 575nm peak) represents a variant within the green spectrum family. Active product status and RoHS3 compliance support production continuity. MSL 4 rating requires stricter moisture control during storage (72 hours versus 168 hours). This part is suitable for applications where yellow-green indication is optically acceptable as an alternative to pure green.

Compliance Basis:

Both substitute parts carry RoHS3 compliance certification, meeting current environmental and hazardous substance restrictions. ECCN and HTSUS classifications remain consistent across all three parts (EAR99 and 8541.41.0000 respectively), indicating no change in export control or tariff classification.

Frequently Asked Questions (FAQ)

Q: Can CMD9121VGCTR10 be used as a direct replacement for QTLP9124ZR?

A: Yes. The CMD9121VGCTR10 maintains identical electrical parameters (2.1V forward voltage), optical intensity (50mcd), viewing angle (25°), and physical package dimensions (2.50mm L x 2.00mm W, 3.00mm height). The 2-SMD Z-Bend package configuration and surface mount mounting type are identical. Peak wavelength of 565nm falls within the green LED spectrum. The Bottom Entry variant designation does not affect PCB assembly compatibility.

Q: What is the difference between the green and yellow-green options?

A: The QTLP9124ZR and CMD9121VGCTR10 are pure green LEDs with peak wavelengths of 585nm and 565nm respectively. The EASZ2025GA1 is classified as yellow-green with a dominant wavelength of 573nm and peak wavelength of 575nm. Yellow-green LEDs appear visually more yellow-tinted compared to pure green. Selection between these options depends on the specific color requirement of the application. Both wavelength ranges fall within the green spectrum family and share identical package, mounting, and viewing angle specifications.

Q: Are there any voltage compatibility concerns with EASZ2025GA1?

A: The EASZ2025GA1 operates at 2V forward voltage compared to the QTLP9124ZR specification of 2.1V. This 0.1V difference falls within standard LED manufacturing tolerances and is compatible with typical circuit designs that accommodate forward voltage variation. Both parts are tested at 20mA current. Circuit designs should verify that the power supply and current-limiting resistor values accommodate the 2V operating point.

Q: What is the impact of different MSL ratings?

A: The QTLP9124ZR and CMD9121VGCTR10 both carry MSL 3 rating, allowing 168 hours of storage at elevated temperature and humidity before reflow soldering. The EASZ2025GA1 carries MSL 4 rating, which restricts storage to 72 hours under the same conditions. MSL 4 components require more frequent inventory rotation and stricter environmental controls during storage and handling. Selection of EASZ2025GA1 requires implementation of enhanced moisture management procedures.

Q: Are packaging and tape specifications compatible?

A: The QTLP9124ZR is supplied in standard packaging. The CMD9121VGCTR10 is supplied in Tape & Reel (TR) format, which is the standard automated assembly packaging for surface mount components. Both formats contain identical components and are compatible with standard pick-and-place assembly equipment. The EASZ2025GA1 packaging format is not specified in the provided data but uses the same 2-SMD Z-Bend package configuration.

Q: Can these parts be used interchangeably in existing designs?

A: CMD9121VGCTR10 can be used as a direct interchange with no design modifications required. EASZ2025GA1 can be used as an interchange with consideration for the yellow-green color variant and the more restrictive MSL 4 moisture sensitivity level. Both substitute parts maintain the same electrical operating parameters, physical footprint, and mounting requirements as the original QTLP9124ZR.