LTL-307ENF-D Equivalent & Substitute Parts

Part Overview

The LTL-307ENF-D is a red diffused through-hole LED manufactured by Lite-On Inc., designed for indication applications with a dominant wavelength of 623nm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance requirements. The LTL-4223 serves as the manufacturer-recommended equivalent, offering comparable optical and electrical characteristics within the same product family.

Substiute Parts

LTL-307ENF-D

Lite-On Inc.In Stock: 1102LTL-307ENF-D Datasheet

Current PartRFQ

LTL-4223

Lite-On Inc.In Stock: 2726LTL-4223 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTL-307ENF-D with the LTL-4223 is based on the following critical parameters that determine functional equivalence:

Optical Characteristics: Both parts maintain identical dominant (623nm) and peak (635nm) wavelengths, ensuring color consistency in indication applications. The diffused lens transparency and round domed-top lens style are preserved across both parts.

Electrical Specifications: Forward voltage (Vf) remains constant at 2V, supporting direct circuit compatibility. The millicandela rating of 19mcd is maintained, preserving brightness output for indication purposes.

Mechanical Compatibility: Both parts feature through-hole radial mounting with identical maximum height (8.60mm), enabling direct PCB layout compatibility.

Environmental Compliance: Both parts carry MSL 1 (Unlimited) rating and EAR99 ECCN classification, maintaining equivalent environmental and regulatory standing.

Differences: The LTL-4223 operates at a reduced test current of 10mA (versus 20mA for the LTL-307ENF-D) and features a slightly larger lens size (5mm T-1 3/4 versus 4.80mm), with a narrower viewing angle of 36° (versus 50°). The LTL-4223 is classified as Active product status with RoHS3 and REACH compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LTL-4223 is the manufacturer-recommended substitute for the obsolete LTL-307ENF-D. Selection of the LTL-4223 is supported by:

Product Status: The LTL-4223 maintains Active product status with established supply chain availability, whereas the LTL-307ENF-D is classified as Obsolete.

Regulatory Compliance: The LTL-4223 carries RoHS3 Compliant and REACH Affected certifications, meeting current environmental and regulatory requirements for electronic components in regulated markets.

Functional Equivalence: Identical forward voltage, dominant wavelength, peak wavelength, and millicandela rating ensure direct functional substitution in indication circuits.

Mechanical Compatibility: Matching through-hole radial mounting and maximum height enable direct PCB layout compatibility without redesign.

Circuit Considerations: The reduced test current specification (10mA versus 20mA) may require verification of circuit current-limiting resistor values to ensure proper LED operation within the substitute part's rated parameters.

Frequently Asked Questions (FAQ)

Q: Can the LTL-4223 be used as a direct replacement for the LTL-307ENF-D?

A: Yes, the LTL-4223 is the manufacturer-recommended substitute. Both parts share identical forward voltage (2V), dominant wavelength (623nm), peak wavelength (635nm), and millicandela rating (19mcd). Through-hole radial mounting and maximum height are identical, enabling direct PCB compatibility.

Q: What are the key differences between these parts?

A: The LTL-4223 operates at a reduced test current of 10mA compared to 20mA for the LTL-307ENF-D. The LTL-4223 features a larger lens size (5mm T-1 3/4 versus 4.80mm) and a narrower viewing angle (36° versus 50°). The LTL-4223 is Active product status with RoHS3 and REACH compliance, while the LTL-307ENF-D is Obsolete.

Q: Will the narrower viewing angle of the LTL-4223 affect circuit performance?

A: The viewing angle difference (36° versus 50°) affects the spatial distribution of light output. Applications requiring wide-angle indication may require circuit or optical design adjustments to compensate for the narrower beam pattern of the LTL-4223.

Q: Are there any circuit modifications required when substituting the LTL-4223?

A: The reduced test current specification (10mA versus 20mA) requires verification of current-limiting resistor values in the circuit. Existing resistor values designed for 20mA operation may need adjustment to ensure proper LED brightness and operating point within the LTL-4223's rated parameters.

Q: What is the packaging difference between these parts?

A: The LTL-307ENF-D is supplied in standard through-hole packaging. The LTL-4223 is supplied in Bulk packaging with T-1 3/4 form factor designation, indicating the standardized 5mm lens diameter package style.

Q: Are both parts compliant with current environmental regulations?

A: The LTL-4223 carries RoHS3 Compliant and REACH Affected certifications. The LTL-307ENF-D compliance status is not specified in the provided data. For applications in regulated markets, the LTL-4223 is the recommended choice due to documented compliance certifications.