3GTL-S Equivalent and Substitute Parts

Part Overview

The 3GTL-S is a green LED indicator in a 3mm T-1 through-hole radial package, manufactured by Bivar Inc. This component is rated at 1.8V forward voltage with a 7.5mcd brightness rating and 30° viewing angle. The product status is obsolete, requiring identification of functionally equivalent alternatives for ongoing system support and new designs. Substitute parts must maintain electrical compatibility, mechanical fit, and optical characteristics suitable for green LED indication applications.

Substiute Parts

3GTL-S

Bivar Inc.In Stock: 11003GTL-S Datasheet

Current PartRFQ

HLMP-1790

Broadcom LimitedIn Stock: 24317HLMP-1790 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The HLMP-1790 qualifies as a substitute based on the following matching parameters:

Mechanical Compatibility: Both parts use identical 3mm T-1 lens size, radial package configuration, and through-hole mounting. Mechanical fit is preserved across PCB layouts and mechanical assemblies.

Electrical Parameters: Both operate at similar forward voltages (1.8V vs. 1.9V) with identical test current specifications (2mA). The 0.1V difference falls within normal operational tolerance for indicator applications.

Optical Characteristics: Both are green LEDs with similar spectral output in the 565-569nm range. While the HLMP-1790 features a diffused lens versus the 3GTL-S clear lens, both are suitable for discrete green LED indication.

Compliance and Status: The HLMP-1790 is active in production with ROHS3 compliance and REACH unaffected status, whereas the 3GTL-S is obsolete. This ensures ongoing supply chain availability.

Key Substitution Parameters: Color, lens size, package type, mounting method, operating voltage range, test current, and wavelength compatibility.

Parameter Comparison

Engineering Selection Recommendations

The HLMP-1790 serves as the primary substitute for the obsolete 3GTL-S. Selection is justified by:

Production Status: The HLMP-1790 is an active product with current manufacturing support, addressing the supply constraints of the discontinued 3GTL-S.

Compliance Certifications: The HLMP-1790 carries ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for modern applications.

Mechanical and Electrical Compatibility: Identical package dimensions and through-hole mounting enable direct substitution in existing designs. Forward voltage and test current specifications are compatible within standard operational limits.

Circuit Integration: Designs currently using the 3GTL-S can transition to the HLMP-1790 without circuit modifications. Standard series resistor calculations for 2mA operation at 1.8-1.9V forward voltage remain applicable.

Frequently Asked Questions (FAQ)

Q: Can the HLMP-1790 replace the 3GTL-S in existing circuit designs? A: Yes. Both components share identical 3mm T-1 radial package geometry, through-hole mounting, and compatible electrical characteristics (1.8V vs. 1.9V Vf, 2mA test current). Direct mechanical and electrical substitution is supported.

Q: How does the forward voltage difference (1.8V vs. 1.9V) affect circuit operation? A: The 0.1V difference is within normal operational tolerance for indicator LED circuits. Series resistor values calculated for the original 1.8V specification will function with the 1.9V HLMP-1790 without circuit modifications.

Q: What is the impact of the diffused lens on the HLMP-1790 versus the clear lens specification? A: The HLMP-1790 features a diffused lens, which provides broader light distribution compared to a clear lens. This is compatible with green LED indication applications and may provide improved visibility at wider viewing angles.

Q: Why does the HLMP-1790 have lower millicandela rating (2.3mcd vs. 7.5mcd)? A: The millicandela difference is offset by the increased viewing angle (50° vs. 30°) on the HLMP-1790. The diffused lens distributes light over a wider area, reducing peak intensity while maintaining suitable brightness for indication purposes across broader viewing angles.

Q: Are there any compliance or supply chain considerations when switching to the HLMP-1790? A: The HLMP-1790 is ROHS3 compliant and REACH unaffected, meeting modern regulatory standards. As an active Broadcom Limited product with inventory in stock, long-term supply availability is assured.

Q: What package formats are available for the HLMP-1790? A: The HLMP-1790 is supplied in bulk packaging. The component maintains the standard T-1 (3mm) radial configuration for through-hole PCB assembly.

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