HT3-GRN-T LED Circuit Board Indicator Equivalent & Substitute Parts

Part Overview

The HT3-GRN-T is a 3mm surface mount right-angle LED circuit board indicator manufactured by Bivar Inc. This component is a single green diffused LED with a domed top lens, designed for SMD applications requiring low-voltage indicator functionality. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing production and maintenance applications. Substitute parts must maintain functional equivalence across mounting type, lens configuration, and electrical performance parameters while accommodating minor variations in electrical ratings and availability status.

Substiute Parts

HT3-GRN-T

Bivar Inc.In Stock: 1014HT3-GRN-T Datasheet

Current PartRFQ

SSF-LXH305GD-TR

Lumex Opto/Components Inc.In Stock: 2446SSF-LXH305GD-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HT3-GRN-T are identified based on strict equivalence across the following critical parameters:

Mechanical Compatibility:

• Lens size: 3mm, T-1 form factor
• Lens style: Round with domed top configuration
• Mounting type: Surface mount, right-angle orientation

Optical Compatibility:

• Color: Green wavelength range (560–570nm peak wavelength acceptable)
• Lens type: Diffused, tinted finish

Electrical Compatibility:

• Configuration: Single LED element
• Voltage rating: 2.0–2.2V forward voltage range
• Current rating: 20–30mA operating current range
• Millicandela rating: 25–30mcd brightness range

Compliance Requirements:

• RoHS3 compliance mandatory
• ECCN and HTSUS classification alignment

The substitute part SSF-LXH305GD-TR from Lumex Opto/Components Inc. meets all mechanical, optical, and electrical compatibility criteria within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SSF-LXH305GD-TR

The SSF-LXH305GD-TR is the qualified substitute for the obsolete HT3-GRN-T based on the following engineering criteria:

Compliance Alignment: Both parts maintain ROHS3 compliance and share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, ensuring regulatory equivalence for procurement and export documentation.

Mechanical Equivalence: Identical 3mm T-1 lens form factor, round domed-top configuration, and surface mount right-angle mounting ensure direct PCB footprint compatibility without layout redesign.

Optical Performance: Green wavelength peak variance of 3nm (568nm vs. 565nm) is within standard LED color tolerance specifications. The substitute provides equivalent visual indication with slightly improved brightness (30mcd vs. 25mcd) and wider viewing angle (60° vs. 40°), enhancing visibility in production applications.

Electrical Compatibility: Forward voltage variance of 0.1V (2.1V vs. 2.2V) and current rating reduction (20mA vs. 30mA) are compatible with standard series resistor circuit designs. The lower current rating reduces power dissipation and extends component life in continuous-operation applications.

Availability Advantage: The substitute part is in active production status with 2,336 units in stock, compared to the obsolete HT3-GRN-T with limited remaining inventory (947 units). Transition to the substitute ensures long-term supply chain continuity.

Moisture Sensitivity Improvement: The substitute features MSL 1 (unlimited shelf life) compared to MSL 4 (72-hour limit), reducing storage and handling constraints.

Frequently Asked Questions (FAQ)

Q: Can the SSF-LXH305GD-TR directly replace the HT3-GRN-T without circuit modification?

A: Yes. Both parts share identical mechanical mounting (3mm T-1 surface mount right-angle), lens configuration (round domed-top diffused green), and compatible electrical ratings (2.1V vs. 2.2V forward voltage, 30mA vs. 20mA current). Standard series resistor circuits designed for the HT3-GRN-T operate within specification with the SSF-LXH305GD-TR. The substitute's lower current rating (20mA) reduces power dissipation without affecting indicator function.

Q: What is the significance of the 3nm wavelength difference (568nm vs. 565nm)?

A: The 3nm variance falls within standard LED color tolerance specifications for green indicators. Both wavelengths are perceived as identical green by human vision and meet CIE chromaticity standards for green LEDs. No visual difference is detectable in circuit board indicator applications.

Q: Why does the substitute have a lower current rating (20mA vs. 30mA)?

A: The SSF-LXH305GD-TR is designed for lower-power operation while maintaining equivalent brightness (30mcd vs. 25mcd). This reflects modern LED efficiency improvements. Existing circuits using 30mA operation remain compatible; the substitute simply requires less current to achieve equal or superior brightness. Reducing operating current extends component lifespan and reduces thermal stress.

Q: What is the impact of different packaging formats (bulk vs. Tape & Reel)?

A: The HT3-GRN-T is supplied in bulk packaging, while the SSF-LXH305GD-TR uses Tape & Reel (TR) format. Tape & Reel packaging is standard for automated SMD assembly and provides superior component protection during storage and handling. If manual assembly or bulk handling is required, the TR format can be manually extracted without functional impact.

Q: How does the MSL rating difference affect component handling?

A: The HT3-GRN-T has MSL 4 (72-hour shelf life after moisture exposure), requiring controlled storage conditions. The SSF-LXH305GD-TR has MSL 1 (unlimited shelf life), eliminating moisture sensitivity constraints. This simplifies inventory management and reduces risk of component degradation during storage.

Q: Are there any circuit design considerations when switching from HT3-GRN-T to SSF-LXH305GD-TR?

A: No design changes are required. The 0.1V forward voltage difference (2.1V vs. 2.2V) is negligible in typical 5V or 3.3V indicator circuits with series resistors. The substitute's wider viewing angle (60° vs. 40°) and higher brightness (30mcd vs. 25mcd) improve visibility without requiring circuit modification.

Q: Is the SSF-LXH305GD-TR suitable for high-volume production?

A: Yes. The substitute is in active production status with 2,336 units currently in stock, compared to the obsolete HT3-GRN-T with limited remaining inventory. Active production status ensures long-term availability and consistent supply for ongoing manufacturing requirements.