LTST-020ZBL Equivalent & Substitute Parts

Part Overview

The LTST-020ZBL is a blue 465nm LED indication component manufactured by Lite-On Inc., configured as a 3.2V discrete 2-SMD surface mount right-angle device with 315mcd brightness. This part is classified as obsolete, making substitute identification necessary for ongoing production and maintenance applications. The component features a clear colorless lens with a rectangular flat-top design and 110° viewing angle, suitable for indicator applications requiring blue wavelength emission.

Substiute Parts

LTST-020ZBL

Lite-On Inc.In Stock: 1171LTST-020ZBL Datasheet

Current PartRFQ

APD3224QBC/D-F01

KingbrightIn Stock: 10495APD3224QBC/D-F01 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTST-020ZBL is determined by the following critical parameters:

• Wavelength alignment: Dominant wavelength must remain 465nm (blue spectrum)
• Electrical compatibility: Forward voltage and test current must support existing circuit design
• Package compatibility: 2-SMD, No Lead configuration required for PCB footprint match
• Optical characteristics: Lens transparency (clear) and color (colorless) must be maintained
• Environmental compliance: Moisture sensitivity level and regulatory certifications must meet or exceed original specifications

The APD3224QBC/D-F01 from Kingbright qualifies as a substitute based on matching wavelength (465nm blue), identical package type (2-SMD, No Lead), equivalent MSL rating (3), and compatible electrical parameters within acceptable circuit tolerance ranges.

Parameter Comparison

Engineering Selection Recommendations

The APD3224QBC/D-F01 is available as an active product with confirmed inventory, addressing the obsolescence status of the LTST-020ZBL. Both components maintain identical REACH and ECCN compliance classifications, ensuring regulatory continuity. The substitute demonstrates equivalent MSL rating and package configuration, supporting direct PCB assembly compatibility.

Electrical parameters show a 0.1V forward voltage differential (3.2V vs. 3.3V at 20mA test current), which falls within standard circuit tolerance for LED indication applications. The substitute provides increased brightness output (900mcd vs. 315mcd), which may require circuit-level current limiting adjustment depending on application requirements.

Optical performance differs in viewing angle specification: the substitute provides a narrower 20° viewing angle compared to the original 110° specification. This parameter variance must be evaluated against specific application requirements for indicator visibility and directional light distribution.

Frequently Asked Questions (FAQ)

Q: Can APD3224QBC/D-F01 be used as a direct drop-in replacement for LTST-020ZBL?

A: Package and electrical compatibility support substitution. However, the 0.1V forward voltage increase and significantly narrower viewing angle (20° vs. 110°) require circuit evaluation. The increased brightness output may necessitate current limiting circuit adjustment.

Q: What are the critical parameters for blue LED substitution?

A: Dominant wavelength (465nm), color (blue), lens transparency (clear), package type (2-SMD, No Lead), and electrical test parameters (20mA current, forward voltage tolerance) determine substitution validity.

Q: Does the viewing angle difference affect circuit functionality?

A: Viewing angle impacts indicator visibility characteristics. The substitute's narrower 20° angle concentrates light output compared to the original 110° wide-angle design. Application-specific visibility requirements must be assessed.

Q: Are environmental compliance ratings equivalent?

A: Both components maintain identical MSL 3 (168 Hours) ratings, REACH Unaffected status, and EAR99 ECCN classification, ensuring equivalent environmental and regulatory compliance.

Q: What is the brightness difference between these components?

A: The substitute provides 900mcd output versus the original 315mcd. This 2.86x brightness increase may require circuit-level current adjustment to maintain consistent indicator intensity in the application.

Q: Is the mounting type compatible?

A: Both components use 2-SMD, No Lead surface mount packages. The original specifies right-angle mounting while the substitute specifies standard surface mount orientation. PCB footprint compatibility must be confirmed for the specific application.