Equivalent & Substitute Parts for 3SGD-F Green LED T-1 Through Hole

Part Overview

The 3SGD-F is a green diffused LED indicator manufactured by Bivar Inc., designed for discrete indication applications in through-hole mounting configurations. This component operates at 2.1V forward voltage with a 30mcd brightness rating and features a 3mm T-1 form factor with a diffused green lens. The 3SGD-F is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain compatibility with the original electrical specifications, mechanical form factor, and mounting requirements while offering active product status and current availability.

Substiute Parts

3SGD-F

Bivar Inc.In Stock: 10283SGD-F Datasheet

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3SGC-F

Bivar Inc.In Stock: 11543SGC-F Datasheet

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1254SYGD/S530-E2

Everlight Electronics Co LtdIn Stock: 10071254SYGD/S530-E2 Datasheet

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SLI-343M8G3F

Rohm SemiconductorIn Stock: 2287SLI-343M8G3F Datasheet

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SLI-343P8G3F

Rohm SemiconductorIn Stock: 15941SLI-343P8G3F Datasheet

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SSL-LX3054SUGD

Lumex Opto/Components Inc.In Stock: 752SSL-LX3054SUGD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3SGD-F are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility:

• Forward voltage (Vf) within 0.1V tolerance of 2.1V nominal
• Test current of 20mA
• Green color emission (wavelength range 560nm to 575nm)
• Diffused lens transparency for uniform light distribution

Mechanical Compatibility:

• 3mm T-1 form factor lens size
• Through-hole radial mounting configuration
• Maximum height within 5.60mm envelope
• Round domed lens style

Regulatory & Availability:

• Active product status preferred for long-term supply assurance
• RoHS3 compliance for environmental standards
• Moisture sensitivity level MSL 1 for unlimited shelf life

The substitute parts identified maintain these core parameters while offering improved availability and active manufacturer support compared to the obsolete 3SGD-F.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SLI-343P8G3F (Rohm Semiconductor)

The SLI-343P8G3F offers the closest electrical compatibility with the 3SGD-F. Forward voltage of 2.2V is within acceptable tolerance of the original 2.1V specification. The part maintains 20mA test current, diffused green lens transparency, and 3mm T-1 form factor. With 22mcd brightness rating, it closely matches the original 30mcd specification. The SLI-343P8G3F carries active product status, ROHS3 compliance, and unlimited MSL rating, ensuring long-term supply availability and regulatory compliance. Inventory of 15,920 units provides production security.

Secondary Substitute: SSL-LX3054SUGD (Lumex Opto/Components Inc.)

The SSL-LX3054SUGD maintains electrical compatibility with 2.2V forward voltage and 20mA test current. The diffused green lens and 3mm T-1 form factor match the original mechanical requirements. At 60mcd brightness, this part exceeds the original 30mcd rating, suitable for applications requiring enhanced visibility. The 60° viewing angle provides wider light distribution compared to the original 35°. ROHS3 compliance and active product status support regulatory requirements and supply continuity.

Alternative Substitute: 3SGC-F (Bivar Inc.)

The 3SGC-F from the same manufacturer as the original part maintains identical electrical specifications (2.1V Vf, 20mA test current) and mechanical form factor (3mm T-1, through-hole radial). The primary difference is clear lens transparency instead of diffused, resulting in higher brightness (50mcd versus 30mcd) with narrower viewing angle (20° versus 35°). This part is suitable only for applications where clear lens characteristics are acceptable. Active product status and ROHS3 compliance ensure regulatory alignment.

Not Recommended: 1254SYGD/S530-E2 (Everlight Electronics)

While this part shares the through-hole radial mounting and diffused lens characteristics, it is classified as yellow-green (573nm dominant wavelength, 575nm peak) rather than pure green. The 160mcd brightness significantly exceeds the original specification. This part is suitable only for applications where yellow-green color emission is functionally equivalent to green.

Frequently Asked Questions (FAQ)

Q: Can the 3SGC-F substitute for the 3SGD-F in all applications?

A: The 3SGC-F maintains identical electrical specifications (2.1V, 20mA) and mechanical form factor. The primary difference is lens transparency: 3SGC-F has a clear lens versus the diffused lens of the 3SGD-F. Clear lenses produce higher brightness (50mcd) with narrower viewing angle (20°). Substitution is valid only if the application accepts these optical characteristics.

Q: What is the voltage tolerance for substitute parts?

A: The 3SGD-F operates at 2.1V nominal forward voltage. Substitute parts with 2.2V forward voltage (SLI-343M8G3F, SLI-343P8G3F, SSL-LX3054SUGD) are within acceptable tolerance for series-resistor-limited LED circuits. Circuit design must account for the 0.1V difference in voltage drop.

Q: Are all substitute parts RoHS3 compliant?

A: SLI-343M8G3F, SLI-343P8G3F, 3SGC-F, and SSL-LX3054SUGD are confirmed ROHS3 compliant. The 1254SYGD/S530-E2 RoHS status is not specified in available data. Verify RoHS compliance with the supplier for the Everlight part if regulatory compliance is required.

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

A: Diffused lenses scatter light uniformly across a wider viewing angle with lower peak brightness. Clear lenses concentrate light in a narrower viewing angle with higher peak brightness. The 3SGD-F uses a diffused lens (35° viewing angle, 30mcd). Substitute parts maintain diffused characteristics except the 3SGC-F, which uses a clear lens (20° viewing angle, 50mcd).

Q: Can the 1254SYGD/S530-E2 yellow-green LED replace the green 3SGD-F?

A: The 1254SYGD/S530-E2 emits yellow-green light (573nm dominant, 575nm peak) rather than pure green (568nm). This part is suitable only if the application accepts yellow-green color emission as functionally equivalent to green. The significantly higher brightness (160mcd versus 30mcd) may also require circuit redesign.

Q: Which substitute offers the best brightness match to the original 3SGD-F?

A: The SLI-343P8G3F (22mcd) provides the closest brightness match to the original 30mcd specification. The SSL-LX3054SUGD (60mcd) and 3SGC-F (50mcd) offer higher brightness suitable for applications requiring enhanced visibility.

Q: Are all substitute parts available in through-hole radial configuration?

A: All identified substitute parts are through-hole radial mounted with 3mm T-1 form factor or equivalent 3mm diameter lens size. Mechanical compatibility is confirmed across all substitutes.

Q: What is the maximum height difference between the 3SGD-F and substitute parts?

A: The 3SGD-F has a maximum height of 5.30mm. Substitute parts range from 5.20mm (1254SYGD/S530-E2) to 5.60mm (SLI-343M8G3F, SLI-343P8G3F). All parts fit within standard through-hole PCB clearance envelopes.