74S-NWG5H-CG LED Panel Indicator Equivalent & Substitute Parts

Part Overview

The 74S-NWG5H-CG is a PMI panel-mount LED indicator manufactured by Visual Communications Company (VCC). This component is a green LED panel indicator designed for 5V applications with a 0.31" (7.92mm) round panel cutout and PC pin termination. The part is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing system support, maintenance, and new design implementations where this specific part is no longer available from original inventory channels.

Substiute Parts

74S-NWG5H-CG

Visual Communications Company - VCCIn Stock: 109674S-NWG5H-CG Datasheet

Current PartRFQ

6571602103F

DialightIn Stock: 13486571602103F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74S-NWG5H-CG requires functional equivalence based on the following critical parameters:

Electrical Compatibility:

• Voltage rating of 5V (primary operating voltage)
• Current rating of 15mA maximum (design current envelope)
• Green lamp color and peak wavelength of 520nm (optical specification)

Mechanical Compatibility:

• Round panel cutout shape with 0.31" (7.92mm) diameter (physical mounting interface)
• Round lens style with flat top (visual presentation and mounting geometry)
• Panel-mount configuration (installation method)

Regulatory Compliance:

• ROHS3 compliance (environmental and material restrictions)
• EAR99 export classification (trade compliance)
• HTSUS code 8541.41.0000 (tariff classification)

The substitute part 6571602103F from Dialight meets the core electrical requirements (5V, green LED, 520nm wavelength) and regulatory compliance standards. However, mechanical differences exist in panel cutout dimensions (0.69" vs. 0.31"), lens transparency (diffused vs. clear), termination style (wire leads vs. PC pin), and current rating (20mA vs. 15mA). These differences require engineering evaluation for specific application contexts.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Product Status

The 74S-NWG5H-CG is classified as obsolete. The substitute part 6571602103F is active and currently manufactured by Dialight, ensuring long-term availability and supply chain continuity.

Regulatory Compliance

Both components are ROHS3 compliant and classified under EAR99 export control. Both share the identical HTSUS tariff code 8541.41.0000. Substitution does not introduce regulatory compliance issues.

Electrical Compatibility

The 6571602103F operates at the same 5V rating as the original part. The substitute's 20mA maximum current rating exceeds the original 15mA specification, making it electrically compatible with circuits designed for the 74S-NWG5H-CG. The green LED wavelength (520nm) is maintained.

Mechanical and Interface Constraints

The substitute part presents two significant mechanical differences:

1. Panel Cutout Diameter: The 6571602103F requires a 0.69" (17.53mm) cutout versus the original 0.31" (7.92mm). Direct panel mounting is not possible without panel modification or mechanical adapter design.

2. Termination Interface: The 6571602103F uses 6-inch wire leads instead of PC pins. Circuit board connection requires either wire-to-pin soldering, connector adaptation, or PCB redesign.

Optical Characteristics

The original part features a clear lens, while the substitute has a diffused lens. This affects light distribution patterns and may alter the visual appearance of the indicator in the final application.

Recommendation Basis

Selection of the 6571602103F as a substitute is justified by electrical equivalence, regulatory compliance, and active product status. Implementation requires mechanical and interface engineering to accommodate panel cutout diameter differences and termination style conversion. Optical differences should be evaluated against specific application visibility requirements.

Frequently Asked Questions (FAQ)

Q: Can the 6571602103F directly replace the 74S-NWG5H-CG without any modifications?

A: No. While electrically compatible, the 6571602103F requires mechanical modifications. The panel cutout diameter is significantly larger (0.69" vs. 0.31"), and the termination style differs (wire leads vs. PC pins). Panel drilling or adapter design and circuit board connection modification are necessary.

Q: What is the primary reason for seeking a substitute for the 74S-NWG5H-CG?

A: The 74S-NWG5H-CG is classified as obsolete. The 6571602103F is an active product currently manufactured by Dialight, ensuring availability for new production runs and system maintenance.

Q: Are there electrical differences between these two parts?

A: Both operate at 5V with green LED output at 520nm wavelength. The 6571602103F has a higher maximum current rating (20mA vs. 15mA), which is compatible with circuits designed for the original part. No circuit redesign is required from an electrical standpoint.

Q: What is the difference between a clear lens and a diffused lens?

A: A clear lens provides focused, directional light output. A diffused lens scatters light over a wider area, reducing peak brightness but improving visibility from off-axis angles. The 74S-NWG5H-CG has a clear lens with a 45° viewing angle; the 6571602103F has a diffused lens. Application visibility requirements should determine acceptability.

Q: What does the 45° viewing angle on the original part mean?

A: The 45° viewing angle indicates the half-angle at which the LED brightness drops to 50% of its peak value. This is a measure of the light distribution cone. The substitute part's viewing angle specification is not provided in the available data.

Q: Are both parts RoHS compliant?

A: Yes. Both the 74S-NWG5H-CG and 6571602103F are ROHS3 compliant, meeting environmental and material restriction requirements.

Q: What does PC pin termination mean?

A: PC pin termination refers to printed circuit board pins designed for direct insertion into PCB holes or sockets. The 6571602103F uses 6-inch wire leads instead, requiring different connection methods such as soldering to PCB pads or use of terminal connectors.

Q: Can I use an adapter to connect the wire leads of the 6571602103F to a PC pin socket?

A: Adapter solutions are possible but require custom design and validation. The wire lead length (6 inches) and gauge must be compatible with the adapter interface and circuit board layout.

Q: What is the millicandela rating, and why is it important?

A: Millicandela (mcd) measures LED brightness. The 74S-NWG5H-CG is rated at 2400mcd. The 6571602103F millicandela rating is not specified in the available data. Brightness differences may affect application visibility performance.

Q: Are export restrictions different between these two parts?

A: No. Both parts are classified as EAR99 under export control regulations, indicating no specific export licensing requirements beyond standard commercial practices.