LTL-3233A Equivalent & Substitute Parts

Part Overview

The LTL-3233A is a green diffused through-hole LED manufactured by Lite-On Inc., designed for indication applications with a dominant wavelength of 569nm. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The LTL-3233A operates at 2.1V forward voltage with a test current of 20mA and features a rectangular lens with flat top configuration measuring 7.10mm x 2.40mm.

Substiute Parts

LTL-3233A

Lite-On Inc.In Stock: 849LTL-3233A Datasheet

Current PartRFQ

LTL-433G

Lite-On Inc.In Stock: 18246LTL-433G Datasheet

MFR RecommendedRFQ

HLMP-0301

Broadcom LimitedIn Stock: 7721HLMP-0301 Datasheet

MFR RecommendedRFQ

HLMP-0301-C0000

Broadcom LimitedIn Stock: 945HLMP-0301-C0000 Datasheet

MFR RecommendedRFQ

HLMP-0504

Broadcom LimitedIn Stock: 1302HLMP-0504 Datasheet

MFR RecommendedRFQ

HLMP-0504-B0000

Broadcom LimitedIn Stock: 772HLMP-0504-B0000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LTL-3233A is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Green (569nm dominant wavelength)
• Mounting Type: Through Hole
• Package / Case: Radial
• Lens Transparency: Diffused
• Lens Style: Rectangle with Flat Top
• Forward Voltage (Vf): 2.1V nominal
• Test Current: 20mA

Substitute Categories:

Category 1 - Same Manufacturer, Same Color (Lite-On Inc.): The LTL-433G is a direct Lite-On equivalent offering the same green wavelength (569nm), forward voltage (2.1V), and through-hole radial package. This part is active and in production, providing the most direct replacement path.

Category 2 - Alternative Manufacturer, Different Color (Broadcom Limited): The HLMP-0504, HLMP-0504-B0000, HLMP-0301, and HLMP-0301-C0000 are Broadcom alternatives. The HLMP-0504 series maintains green color (569nm) with compatible through-hole radial packaging. The HLMP-0301 series differs in color (red, 626nm) and forward voltage (1.9V), representing a functional alternative only where color change is acceptable in the application.

All substitute parts maintain through-hole radial mounting, diffused lens transparency, and rectangular lens geometry. Forward voltage variations range from 1.9V to 2.2V, requiring circuit verification for applications with strict voltage tolerance requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LTL-433G

The LTL-433G is the preferred substitute for the LTL-3233A. Both parts are manufactured by Lite-On Inc., share identical green wavelength specifications (569nm dominant, 565nm peak), and operate at the same 2.1V forward voltage. The LTL-433G is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. The primary design consideration is the reduced millicandela rating (3.7mcd versus 6.3mcd), which affects brightness output. Lens size differs slightly (5.00mm x 2.00mm versus 7.10mm x 2.40mm), and viewing angle increases to 140°. These differences are acceptable for most indication applications where the original brightness specification is not critical.

Secondary Recommendation: HLMP-0504 or HLMP-0504-B0000

The Broadcom HLMP-0504 series maintains green color (569nm) and through-hole radial packaging with ROHS3 compliance. Forward voltage is 2.2V, representing a 0.1V increase from the LTL-3233A. Millicandela ratings are lower (2.6mcd for HLMP-0504, 1.6mcd for HLMP-0504-B0000). Viewing angle is reduced to 100°. These parts are suitable where Broadcom sourcing is preferred or where Lite-On alternatives are unavailable.

Alternative Consideration: HLMP-0301 or HLMP-0301-C0000

The Broadcom HLMP-0301 series differs in color (red, 626nm) and forward voltage (1.9V). These parts are functional alternatives only in applications where color change from green to red is acceptable. The lower forward voltage (1.9V) may require circuit adjustment. Millicandela ratings are significantly lower (2.1mcd for HLMP-0301, 1.3mcd for HLMP-0301-C0000).

Compliance Considerations:

All active substitute parts carry ROHS3 compliance certification. The LTL-3233A product status is obsolete; all recommended substitutes are active in production, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the LTL-433G directly replace the LTL-3233A without circuit modification?

A: The LTL-433G operates at the same 2.1V forward voltage and 20mA test current as the LTL-3233A, allowing direct substitution in most circuits. However, the reduced brightness (3.7mcd versus 6.3mcd) may be noticeable in applications requiring high visibility. Lens size and viewing angle differences are typically not circuit-critical for indication applications.

Q: What is the impact of forward voltage differences between substitutes?

A: The LTL-433G maintains 2.1V matching the original part. The HLMP-0504 series operates at 2.2V, a 0.1V increase. The HLMP-0301 series operates at 1.9V, a 0.2V decrease. For circuits with fixed current-limiting resistors, these voltage variations affect brightness output but do not prevent operation. Circuits with strict voltage tolerance requirements should prioritize the LTL-433G.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts use through-hole radial mounting with rectangular diffused lenses. Lens dimensions vary: LTL-433G uses 5.00mm x 2.00mm, while Broadcom parts use 7.31mm x 2.35mm. These differences may affect PCB layout and mechanical fit. Verify lens size compatibility with your application's physical constraints.

Q: What is the brightness difference between the LTL-3233A and substitute parts?

A: The LTL-3233A provides 6.3mcd. The LTL-433G provides 3.7mcd (59% of original). The HLMP-0504 provides 2.6mcd (41% of original). The HLMP-0504-B0000 provides 1.6mcd (25% of original). The HLMP-0301 series provides 2.1mcd and 1.3mcd respectively. Applications requiring the original brightness specification may not be satisfied by these substitutes.

Q: Can I use the red HLMP-0301 series in place of the green LTL-3233A?

A: The HLMP-0301 series is functionally compatible in terms of mounting, package, and electrical operation. However, the color change from green (569nm) to red (626nm) is a significant functional difference. Use this substitute only in applications where color change is acceptable or where the indication function does not depend on specific wavelength.

Q: What is the viewing angle impact of using HLMP-0504 instead of LTL-3233A?

A: The LTL-3233A provides a 130° viewing angle. The HLMP-0504 provides a 100° viewing angle, a 30° reduction. This narrower viewing angle may affect visibility in applications requiring wide-angle indication. The LTL-433G provides a 140° viewing angle, exceeding the original specification.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts (LTL-433G, HLMP-0504, HLMP-0504-B0000, HLMP-0301, HLMP-0301-C0000) carry ROHS3 compliance certification. The original LTL-3233A does not specify RoHS status. For applications requiring RoHS compliance, all recommended substitutes meet this requirement.