AM27SGC03 Equivalent & Substitute Parts Reference

Part Overview

The AM27SGC03 is an active green LED indication component manufactured by Kingbright, designed for surface mount applications in discrete 2-SMD Gull Wing configuration. This part operates at a forward voltage of 2.2V with a test current of 20mA, delivering 100mcd luminous intensity at a dominant wavelength of 568nm. The component features a clear, domed round lens with 1.78mm diameter and 20° viewing angle, housed in a compact 2.21mm × 2.21mm footprint with 2.92mm maximum height.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers while preserving circuit functionality and assembly requirements.

Substiute Parts

AM27SGC03

KingbrightIn Stock: 821AM27SGC03 Datasheet

Current PartRFQ

CMD91-21VGC/TR7

Visual Communications Company - VCCIn Stock: 4366CMD91-21VGC/TR7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AM27SGC03 is determined by strict alignment with the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Color specification: Green optical output
• Forward voltage range: Tolerance within typical circuit design margins (2.1V to 2.2V acceptable for most applications)
• Mounting configuration: Surface Mount, 2-SMD Gull Wing package
• Regulatory compliance: ROHS3 Compliant status maintained
• Moisture sensitivity: MSL 3 classification

Important Compatibility Parameters:

• Lens configuration: Round domed top geometry
• Wavelength alignment: Peak wavelength 565nm (green spectrum)
• Viewing angle: 20° to 25° range maintains directional consistency
• Physical dimensions: Footprint compatibility within SMD assembly tolerances

Identified Substitute: The CMD91-21VGC/TR7 (Visual Communications Company - VCC) meets substitution criteria through equivalent green LED indication functionality, compatible 2-SMD Gull Wing surface mount configuration, matching ROHS3 compliance, and MSL 3 moisture sensitivity classification. Forward voltage of 2.1V operates within acceptable circuit design parameters relative to the AM27SGC03 specification of 2.2V.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - AM27SGC03 (Kingbright): Select the AM27SGC03 when maximum brightness output of 100mcd is required for the application. This part maintains active product status with full ROHS3 compliance and REACH unaffected classification. The 20° viewing angle provides focused light distribution suitable for directed indication applications.

Substitute Selection - CMD91-21VGC/TR7 (VCC): The CMD91-21VGC/TR7 serves as a functional equivalent when the application can accommodate reduced brightness output of 50mcd. This substitute maintains identical regulatory compliance (ROHS3, REACH unaffected, EAR99 classification) and equivalent moisture sensitivity handling requirements. The 25° viewing angle provides broader light distribution compared to the primary part. Forward voltage of 2.1V versus 2.2V introduces negligible circuit impact in standard LED indication circuits with current-limiting resistor design.

Substitution Constraints:

• Brightness reduction from 100mcd to 50mcd must be acceptable for the intended indication function
• Wider viewing angle (25° versus 20°) may affect optical performance in applications requiring narrow directional output
• Dimensional variance (height 3.00mm versus 2.92mm) must be verified against PCB clearance and enclosure constraints
• Both parts maintain identical MSL 3 classification; storage and handling procedures remain unchanged

Frequently Asked Questions (FAQ)

Q: Can the CMD91-21VGC/TR7 directly replace the AM27SGC03 in existing designs?

A: Direct replacement is possible from a mechanical and electrical standpoint. Both components use identical 2-SMD Gull Wing surface mount configuration, operate within compatible forward voltage ranges (2.1V versus 2.2V), and maintain equivalent regulatory compliance. However, the substitute provides 50mcd brightness versus the original 100mcd specification. Applications requiring specific brightness levels must evaluate whether the reduced output is acceptable.

Q: What is the impact of the 0.1V forward voltage difference between these parts?

A: The 0.1V difference (2.2V original versus 2.1V substitute) is negligible in standard LED indication circuits. Current-limiting resistor designs accommodate this variance through normal component tolerances. Circuit voltage supply and resistor selection remain unchanged. No recalculation of circuit parameters is required.

Q: How do the viewing angles differ between these parts?

A: The AM27SGC03 provides a 20° viewing angle, while the CMD91-21VGC/TR7 offers 25°. The substitute's wider viewing angle distributes light over a broader area. Applications requiring narrow, focused light output should retain the original part. Applications tolerating or benefiting from wider light distribution can use the substitute.

Q: Are there any packaging or storage differences?

A: Both parts maintain identical Moisture Sensitivity Level 3 (168 Hours) classification. Storage, handling, and reflow procedures are equivalent. The AM27SGC03 is supplied in standard packaging, while the CMD91-21VGC/TR7 is supplied in Tape & Reel format. Tape & Reel packaging is standard for high-volume surface mount assembly and does not affect component performance.

Q: What are the physical dimension tolerances for PCB footprint compatibility?

A: The AM27SGC03 measures 2.21mm L × 2.21mm W with 2.92mm maximum height. The CMD91-21VGC/TR7 measures 2.50mm L × 2.00mm W with 3.00mm maximum height. These dimensional variations fall within standard SMD assembly tolerances and do not require PCB footprint redesign. Verify clearance for the 3.00mm height in space-constrained applications.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the AM27SGC03 and CMD91-21VGC/TR7 maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification. No regulatory differences exist between these parts.

Q: What is the primary reason to choose the substitute over the original part?

A: The CMD91-21VGC/TR7 substitute is selected when component availability, lead time, or cost considerations favor the VCC manufacturer while the application can accommodate 50mcd brightness output. Electrical compatibility and regulatory compliance are maintained. Brightness performance is the primary technical differentiator.