CMD91-21VRC/TR7 Equivalent & Substitute Parts

Part Overview

The CMD91-21VRC/TR7 is a red LED indication component manufactured by Visual Communications Company (VCC) in a 2-SMD Gull Wing surface mount package. This discrete LED operates at 2V forward voltage with 80 millicandela brightness and a 640nm peak wavelength, designed for standard red indication applications.

The CMD91-21VRC/TR7 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

CMD91-21VRC/TR7

Visual Communications Company - VCCIn Stock: 1124CMD91-21VRC/TR7 Datasheet

Current PartRFQ

QTLP9122GR

Everlight Electronics Co LtdIn Stock: 771QTLP9122GR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMD91-21VRC/TR7 are identified based on strict parametric equivalence across the following critical criteria:

Electrical Parameters: Forward voltage (2V), millicandela rating (80mcd), and peak wavelength in the red spectrum (640nm range)

Optical Parameters: Clear lens transparency, round domed top lens style, 1.90mm lens diameter, and 25° viewing angle

Mechanical Parameters: 2-SMD Gull Wing package configuration, surface mount mounting type, 2.50mm L x 2.00mm W dimensions, and 3.00mm maximum height

Environmental & Compliance Parameters: ROHS3 compliance, MSL 3 rating, and equivalent regulatory classifications

Substitution is valid only when all parameters match the specified tolerances and classifications. The QTLP9122GR from Everlight Electronics Co Ltd meets these criteria as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

The QTLP9122GR from Everlight Electronics Co Ltd is a parametric equivalent substitute for the obsolete CMD91-21VRC/TR7. Both components share identical electrical, optical, and mechanical specifications across all critical parameters.

The primary distinction is product status: CMD91-21VRC/TR7 is obsolete, while QTLP9122GR is active. This status difference makes QTLP9122GR the appropriate selection for new designs, production continuity, and long-term supply chain stability.

Both components maintain ROHS3 compliance and equivalent regulatory classifications (ECCN: EAR99, HTSUS: 8541.41.0000), ensuring compatibility with environmental and trade requirements.

The peak wavelength difference of 5nm (640nm versus 635nm) falls within the standard red LED spectrum and does not constitute a functional limitation for indication applications.

Frequently Asked Questions (FAQ)

Q: Can QTLP9122GR directly replace CMD91-21VRC/TR7 in existing designs?

A: Yes. QTLP9122GR meets all parametric requirements for direct substitution. Identical forward voltage (2V), brightness (80mcd), package configuration (2-SMD Gull Wing), and physical dimensions (2.50mm L x 2.00mm W x 3.00mm H) ensure mechanical and electrical compatibility without circuit modification.

Q: What is the significance of the 5nm wavelength difference (640nm vs 635nm)?

A: Both wavelengths fall within the standard red LED spectrum. The 5nm difference is within typical manufacturing tolerances for red LEDs and does not affect visual appearance or functional performance in indication applications.

Q: Why is product status important for component selection?

A: CMD91-21VRC/TR7 is obsolete, meaning VCC no longer manufactures or supports this component. QTLP9122GR is active, ensuring continued availability, technical support, and supply chain reliability for current and future production runs.

Q: Are there any compliance differences between these components?

A: No. Both components are ROHS3 compliant, carry identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, and share the same MSL 3 rating (168 Hours). Regulatory and environmental requirements are equivalent.

Q: What does the 2-SMD Gull Wing package mean?

A: This describes a surface mount LED package with two solder pads in a gull wing configuration, designed for automated pick-and-place assembly on PCBs. The 2.50mm x 2.00mm footprint and 3.00mm maximum height are standard for this package type.

Q: Is the current test parameter (20mA for QTLP9122GR) a limiting factor?

A: The current test parameter indicates the measurement condition used during manufacturing validation. It does not restrict operating current and does not affect substitution compatibility. Circuit design should follow the forward voltage specification (2V) and application requirements.