LTW-815C4 Equivalent & Substitute Parts

Part Overview

The LTW-815C4 is a white LED indication component manufactured by Lite-On Inc., designed for through-hole radial mounting applications. This part operates at a forward voltage of 3.5V with a test current of 20mA, delivering 85 millicandela brightness with a 130° viewing angle. The component features a 3.00mm diameter round lens with flat top and clear colorless transparency.

The LTW-815C4 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

LTW-815C4

Lite-On Inc.In Stock: 954LTW-815C4 Datasheet

Current PartRFQ

LTW-87HD4B

Lite-On Inc.In Stock: 1117LTW-87HD4B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTW-815C4 is determined by the following critical parameters:

• Color: White
• Lens Transparency: Clear colorless
• Mounting Type: Through hole radial configuration
• Lens Style: Round with flat top
• Manufacturer: Lite-On Inc.
• Viewing Angle: 130°

The LTW-87HD4B qualifies as a substitute based on matching these core parameters. While the substitute part exhibits variations in forward voltage (3.3V vs. 3.5V), millicandela rating (140mcd vs. 85mcd), lens size designation (T-1 vs. 3.00mm), and height (3.95mm vs. 4.60mm), these differences remain within acceptable tolerance ranges for equivalent LED indication functionality in through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

The LTW-87HD4B is an active production component manufactured by Lite-On Inc. and carries ROHS3 compliance certification, making it suitable for applications requiring regulatory adherence. The substitute part operates at a lower forward voltage (3.3V) compared to the original LTW-815C4 (3.5V), which may require circuit design verification to ensure proper current limiting and brightness performance.

The LTW-87HD4B delivers increased brightness output (140mcd vs. 85mcd) while maintaining identical viewing angle (130°) and test current (20mA) specifications. The reduced maximum height (3.95mm vs. 4.60mm) and improved moisture sensitivity rating (MSL 1 vs. MSL 2) represent design enhancements in the substitute part.

Frequently Asked Questions (FAQ)

Q: Can the LTW-87HD4B directly replace the LTW-815C4 in existing designs?

A: The LTW-87HD4B shares the same color, lens transparency, mounting type, and viewing angle as the LTW-815C4. However, the forward voltage difference (3.3V vs. 3.5V) and increased brightness (140mcd vs. 85mcd) require circuit-level evaluation to confirm compatibility with existing current-limiting resistor values and brightness requirements.

Q: What are the physical differences between these parts?

A: The LTW-87HD4B is shorter (3.95mm maximum height) compared to the LTW-815C4 (4.60mm maximum height). Both parts use through-hole radial mounting with round flat-top lens geometry. The lens size designation differs (T-1 vs. 3.00mm diameter), though both maintain compatible form factors for standard LED mounting applications.

Q: Why is the LTW-815C4 classified as obsolete?

A: The LTW-815C4 is no longer in active production. The LTW-87HD4B represents the current-generation equivalent from Lite-On Inc., offering improved specifications including active product status, ROHS3 compliance, and enhanced moisture sensitivity rating.

Q: Are there compliance differences between these parts?

A: The LTW-87HD4B carries ROHS3 compliance certification. The LTW-815C4 compliance status is not specified in available documentation. Both parts share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications.