LTL-4263 LED Red Diffused T-1 3/4 Through Hole - Equivalent & Substitute Parts

Part Overview

The LTL-4263 is a red diffused LED indicator manufactured by Lite-On Inc., designed for through-hole mounting applications. This component features a 5mm lens diameter with a domed top configuration and operates at 1.8V forward voltage with a 20mA test current. The part is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing production and maintenance applications. Substitute parts must maintain compatibility with the through-hole mounting footprint and preserve the core optical and electrical characteristics required for red LED indication circuits.

Substiute Parts

LTL-4263

Lite-On Inc.In Stock: 762LTL-4263 Datasheet

Current PartRFQ

1383-2SURD/S530-A3

Everlight Electronics Co LtdIn Stock: 7481383-2SURD/S530-A3 Datasheet

MFR RecommendedRFQ

WP7113SRD/J4

KingbrightIn Stock: 12754WP7113SRD/J4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTL-4263 are qualified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Color: Red
• Lens Transparency: Diffused
• Mounting Type: Through Hole
• Package Configuration: Radial with 5mm lens diameter
• Lens Style: Round with Domed Top
• Current - Test: 20mA
• Electrical Operation: Forward voltage in the range of 1.8V to 2.1V

Secondary Compatibility Considerations:

• Wavelength range: Dominant wavelength between 624nm and 640nm
• Physical dimensions: Height maximum between 8.60mm and 9.85mm
• Viewing angle: Between 30° and 40°
• Brightness rating: Millicandela rating from 135mcd to 1800mcd

The two qualified substitute parts maintain the core through-hole radial package configuration and diffused red lens characteristics. Both substitutes operate within acceptable forward voltage and current parameters for direct circuit replacement. Variations in brightness and viewing angle reflect design improvements in active production parts compared to the obsolete original component.

Parameter Comparison

Engineering Selection Recommendations

1383-2SURD/S530-A3 (Everlight Electronics)

This substitute provides a direct form-factor replacement with active product status. The forward voltage increase from 1.8V to 2V requires circuit verification to ensure adequate current limiting resistor sizing. The brightness increase to 500mcd and expanded viewing angle to 40° represent performance improvements over the obsolete LTL-4263. This part is suitable for applications where moderate brightness enhancement is acceptable and circuit design allows for the 0.2V forward voltage adjustment.

WP7113SRD/J4 (Kingbright)

This substitute maintains the T-1 3/4 package designation and offers the closest physical compatibility with the original LTL-4263. The forward voltage of 2.1V represents a 0.3V increase requiring circuit design verification. The significantly higher brightness rating of 1800mcd and narrower viewing angle of 30° indicate this part is optimized for high-intensity indication applications. ROHS3 compliance and active product status ensure long-term availability. This part is recommended for applications requiring enhanced brightness or where the narrower viewing angle is functionally acceptable.

Both substitute parts maintain ROHS3 compliance or equivalent environmental standards. Selection between substitutes depends on circuit tolerance for forward voltage variation and application requirements for brightness and viewing angle characteristics.

Frequently Asked Questions (FAQ)

Q: Can the LTL-4263 be directly replaced with either substitute part without circuit modification?

A: Both substitute parts maintain the same through-hole radial package and 5mm lens configuration. However, the forward voltage differs: the LTL-4263 operates at 1.8V while substitutes operate at 2V (Everlight) or 2.1V (Kingbright). Circuit design must accommodate this voltage difference through resistor recalculation to maintain proper LED current at 20mA test condition.

Q: What is the primary difference between the two substitute parts?

A: The Everlight 1383-2SURD/S530-A3 provides moderate brightness at 500mcd with a 40° viewing angle. The Kingbright WP7113SRD/J4 delivers significantly higher brightness at 1800mcd with a narrower 30° viewing angle. Selection depends on application requirements for brightness intensity and light distribution pattern.

Q: Are both substitute parts RoHS compliant?

A: The Kingbright WP7113SRD/J4 is explicitly ROHS3 compliant. The Everlight 1383-2SURD/S530-A3 RoHS status is not specified in the provided data. Verification with the manufacturer is recommended if RoHS compliance is a requirement.

Q: Will the height difference affect PCB layout?

A: The LTL-4263 has a maximum height of 8.60mm. The Everlight substitute is 8.90mm and the Kingbright substitute is 9.85mm. These differences are within typical through-hole component tolerances but should be verified against specific PCB clearance requirements and enclosure constraints.

Q: What wavelength differences exist between the parts?

A: The LTL-4263 has a dominant wavelength of 638nm. The Everlight substitute is 624nm (slightly more orange-red) and the Kingbright substitute is 640nm (slightly more pure red). These differences are minor and typically imperceptible to human vision in indication applications.