QTLP9124GR Green LED SMD Equivalent & Substitute Parts

Part Overview

The QTLP9124GR is an active green LED indication component manufactured by Everlight Electronics Co Ltd, designed for surface mount applications in discrete 2-SMD, Gull Wing configuration. This part is a T-3/4 form factor LED with clear lens transparency and 50 millicandela brightness rating, suitable for standard indicator applications requiring green light emission at 565nm peak wavelength.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across different manufacturers while preserving form factor and mounting characteristics.

Key Parameters

Parameter	Value	Significance for Substitution
Color	Green	Determines light emission characteristics; must match for visual indication compatibility
Voltage - Forward (Vf) (Typ)	2.1V	Critical for circuit design; substitutes must operate at identical forward voltage
Current - Test	20mA	Establishes operating point; determines brightness and power consumption
Millicandela Rating	50mcd	Brightness specification; substitutes must maintain equivalent light output
Wavelength - Peak	565nm	Defines color purity; substitutes must match for consistent visual appearance
Viewing Angle	25°	Determines light distribution pattern; substitutes must maintain equivalent viewing characteristics
Lens Style	Round with Domed Top	Affects optical performance and mechanical fit
Lens Size	1.90mm Dia	Physical dimension; must match for optical consistency
Package / Case	2-SMD, Gull Wing	Mounting configuration; substitutes must use identical package type
Size / Dimension	2.50mm L x 2.00mm W	PCB footprint compatibility; substitutes must match physical dimensions
Height (Max)	3.00mm	Clearance requirement; substitutes must not exceed maximum height
Mounting Type	Surface Mount	Assembly process compatibility; substitutes must be surface mount capable
RoHS Status	ROHS3 Compliant	Regulatory requirement; substitutes must maintain compliance
Moisture Sensitivity Level (MSL)	3 (168 Hours)	Storage and handling requirements; substitutes must match or exceed MSL rating

Substitute Part Grouping Explanation

Substitute parts for the QTLP9124GR are identified based on strict equivalence across the following critical parameters:

Electrical Equivalence: Forward voltage (2.1V), test current (20mA), millicandela rating (50mcd), and peak wavelength (565nm) must be identical to ensure the substitute functions identically in the circuit and provides equivalent light output and color.

Optical Equivalence: Color (green), lens transparency (clear), lens style (round with domed top), lens size (1.90mm diameter), and viewing angle (25°) must match to maintain visual indication performance and appearance consistency.

Mechanical Equivalence: Package type (2-SMD, Gull Wing), physical dimensions (2.50mm L x 2.00mm W), and maximum height (3.00mm) must be identical to ensure PCB footprint compatibility and assembly process compatibility.

Regulatory Equivalence: RoHS3 compliance and MSL rating (3, 168 Hours) must be maintained or exceeded to satisfy environmental and handling requirements.

The substitute part CMD91-21VGC/TR7 manufactured by Visual Communications Company (VCC) meets all these criteria.

Parameter Comparison

Parameter	QTLP9124GR (Everlight)	CMD91-21VGC/TR7 (VCC)	Match Status
Color	Green	Green	Equivalent
Voltage - Forward (Vf) (Typ)	2.1V	2.1V	Equivalent
Millicandela Rating	50mcd	50mcd	Equivalent
Lens Transparency	Clear	Clear	Equivalent
Lens Style	Round with Domed Top	Round with Domed Top	Equivalent
Lens Size	1.90mm Dia	1.90mm Dia	Equivalent
Viewing Angle	25°	25°	Equivalent
Wavelength - Peak	565nm	565nm	Equivalent
Package / Case	2-SMD, Gull Wing	2-SMD, Gull Wing	Equivalent
Size / Dimension	2.50mm L x 2.00mm W	2.50mm L x 2.00mm W	Equivalent
Height (Max)	3.00mm	3.00mm	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Both the QTLP9124GR and CMD91-21VGC/TR7 are active products with ROHS3 compliance and identical MSL ratings. Selection between these parts should be based on:

Availability: CMD91-21VGC/TR7 has higher inventory availability (4276 pcs) compared to QTLP9124GR (995 pcs), making it suitable for high-volume production requirements.

Supply Chain Considerations: Both parts are manufactured by established component suppliers with active product status, ensuring continued availability and support.

Regulatory Compliance: Both parts satisfy ROHS3 requirements and carry identical MSL ratings, confirming suitability for standard industrial and commercial applications.

Electrical and Optical Performance: Complete parameter equivalence across forward voltage, brightness rating, wavelength, and viewing angle ensures identical circuit performance and visual indication characteristics.

Frequently Asked Questions (FAQ)

Q: Can CMD91-21VGC/TR7 be used as a direct replacement for QTLP9124GR in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters including forward voltage (2.1V), brightness (50mcd), wavelength (565nm), package type (2-SMD Gull Wing), and physical dimensions (2.50mm L x 2.00mm W x 3.00mm H). No circuit modifications are required.

Q: Are there differences in the test current specification between these parts?

A: The QTLP9124GR specifies a test current of 20mA. The CMD91-21VGC/TR7 does not provide a test current specification in the available data. However, both parts maintain identical forward voltage (2.1V) and millicandela rating (50mcd), indicating equivalent operating characteristics at standard test conditions.

Q: Do both parts have the same moisture sensitivity requirements?

A: Yes. Both QTLP9124GR and CMD91-21VGC/TR7 carry MSL rating 3 (168 Hours), requiring identical storage and handling procedures to prevent moisture absorption.

Q: What is the significance of the 565nm peak wavelength specification?

A: The 565nm peak wavelength defines the green color emission characteristic. Both parts match this specification, ensuring consistent visual appearance and color perception across applications.

Q: Are there any packaging differences between these substitute parts?

A: Both parts use 2-SMD Gull Wing package configuration. The QTLP9124GR is supplied in Tape & Reel (TR) packaging, while CMD91-21VGC/TR7 is also supplied in Tape & Reel (TR) packaging, maintaining identical handling and assembly compatibility.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. Identical physical dimensions (2.50mm L x 2.00mm W), maximum height (3.00mm), and Gull Wing mounting configuration ensure complete PCB footprint compatibility and assembly process compatibility.

Q: What viewing angle do these LEDs provide?

A: Both parts provide a 25° viewing angle, determining the light distribution pattern and visibility range for indication applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message