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• Pure HTML table syntax for all tables
• No horizontal rules, concluding statements, or external references
• Output ready for direct web Markdown editor paste

Structure I will follow exactly:

1. Page Title (# with full model number)
2. Part Overview
3. Key Parameters (HTML table)
4. Substitute Part Grouping Explanation
5. Parameter Comparison (HTML table)
6. Engineering Selection Recommendations
7. Frequently Asked Questions (FAQ)

I have all the information I need:

• Main Part: 3GT-201-S (Bivar Inc., Obsolete status)
• Substitute Part: 3GC-201-S (Bivar Inc., Active status)

Generating the reference page now:

Equivalent & Substitute Parts for Bivar 3GT-201-S

Part Overview

The Bivar 3GT-201-S is a 3mm through-hole green LED indicator with a clear lens, rated at 40 millicandela. This component is obsolete and no longer manufactured. The 3GC-201-S serves as the direct manufacturer equivalent, providing identical optical and electrical characteristics while maintaining current production status and component availability.

Substiute Parts

3GT-201-S

Bivar Inc.In Stock: 7683GT-201-S Datasheet

Current PartRFQ

3GC-201-S

Bivar Inc.In Stock: 11853GC-201-S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3GC-201-S qualifies as a direct equivalent to the 3GT-201-S based on the following critical parameters that determine substitutability:

• Optical Characteristics: Identical millicandela rating (40mcd), color (green), lens transparency (clear), and peak wavelength (568nm)
• Electrical Specifications: Matching forward voltage (2.1V) and test current (20mA)
• Mechanical Compatibility: Same lens style (round with domed top), lens size designation (3mm, T-1), mounting type (through hole), and radial package configuration
• Environmental Rating: Identical moisture sensitivity level (1 - Unlimited)
• Compliance: Both components carry the same ECCN (EAR99) and HTSUS classifications

The primary difference is product status: the 3GT-201-S is obsolete while the 3GC-201-S is actively manufactured and available in production quantities.

Parameter Comparison

Engineering Selection Recommendations

The 3GC-201-S is the direct manufacturer substitute for the obsolete 3GT-201-S. Selection of the 3GC-201-S is based on:

• Product Availability: The 3GT-201-S is obsolete with no ongoing production. The 3GC-201-S remains in active manufacturing with 1109 units currently in stock.
• Electrical and Optical Parity: All critical electrical parameters (forward voltage, test current) and optical specifications (brightness, color, wavelength, viewing angle) are identical.
• Mechanical Compatibility: Through-hole mounting, radial package configuration, and lens characteristics ensure direct form and fit compatibility in existing PCB designs. The height difference (5.10mm versus 6.58mm) falls within typical tolerance ranges for LED indicator installations.
• Compliance Status: The 3GC-201-S carries ROHS3 compliance certification, representing current regulatory standards. Both parts share identical ECCN and HTSUS classifications.
• Supply Chain Position: As an active part from the original manufacturer, the 3GC-201-S offers long-term availability and cost stability compared to obsolete inventory sources.

Frequently Asked Questions (FAQ)

Q: Can the 3GC-201-S replace the 3GT-201-S in all applications? A: Yes. The electrical, optical, and mechanical parameters are identical across all specification categories critical to LED indicator function. Both components are from the same manufacturer and share the same base electrical performance (2.1V forward voltage, 20mA test current, 40mcd brightness, 568nm wavelength).

Q: What is the significance of the lens color difference (green versus colorless)? A: The lens transparency rating is clear for both parts, meaning both allow light transmission. The lens color designation does not affect the optical output characteristics or brightness rating, which are identical at 40mcd. This difference reflects only the material designation and does not impact functional equivalence.

Q: Does the height difference of 1.48mm affect compatibility? A: The 3GC-201-S has a maximum height of 6.58mm compared to 5.10mm for the 3GT-201-S. This difference remains within the mechanical tolerance range for 3mm through-hole LED installations on standard PCB designs. Placement height in indicator applications typically accommodates this variation without design modification.

Q: Are there any supply chain or lead time advantages? A: The 3GC-201-S is actively manufactured by Bivar Inc. with 1109 units in current stock, contrasting with the obsolete 3GT-201-S. Active production status ensures reliable availability and pricing stability for ongoing and future production runs.

Q: What compliance standards apply to the 3GC-201-S? A: The 3GC-201-S carries ROHS3 compliance certification, meeting current environmental and material restrictions. Both the original and substitute parts share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications for export and tariff purposes.

Q: Should PCB designs be modified to use the 3GC-201-S? A: No PCB design modifications are required. The radial through-hole package, lens size (3mm T-1), and mounting configuration are identical between both parts. The component can be installed using existing PCB footprints and assembly procedures without changes.