WP813SRC/F Equivalent & Substitute Parts Reference

Part Overview

The WP813SRC/F is an active, through-hole red LED indicator manufactured by Kingbright. This 10mm diameter component operates at 1.85V forward voltage with a 5000mcd brightness rating and 15° viewing angle, designed for discrete indication applications requiring high luminous intensity in a compact radial package. Substitute parts are identified to address inventory availability, lead time constraints, or specific application requirements while maintaining functional compatibility within defined electrical and mechanical parameters.

Substiute Parts

WP813SRC/F

KingbrightIn Stock: 978WP813SRC/F Datasheet

Current PartRFQ

LTL-4266N

Lite-On Inc.In Stock: 52307LTL-4266N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WP813SRC/F are identified based on the following compatibility criteria:

Electrical Compatibility:

• Forward voltage (Vf) within 0.05V tolerance of 1.85V
• Test current maintained at 20mA
• Red spectral output (dominant wavelength 638nm–640nm range)

Optical Compatibility:

• Red color specification
• Peak wavelength alignment at 660nm
• Lens transparency: Clear
• Lens color: Colorless

Mechanical Compatibility:

• Through-hole radial mounting configuration
• Round domed lens style
• Physical dimensions compatible with standard PCB footprints

Compliance Compatibility:

• RoHS3 compliance status
• Moisture Sensitivity Level (MSL) 1 rating
• Active product status

The LTL-4266N substitute part meets electrical and optical criteria but differs in brightness rating (170mcd vs. 5000mcd), viewing angle (45° vs. 15°), lens size (3.00mm vs. 10.00mm), and physical height (6.00mm vs. 13.50mm). These differences define the substitution scope and application constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (WP813SRC/F): Use the WP813SRC/F when high brightness output (5000mcd) and narrow viewing angle (15°) are required for focused indication applications. This component is ROHS3 compliant and maintains active product status with established supply chain availability (948 pcs in stock).

Substitute Selection (LTL-4266N): The LTL-4266N is electrically and optically compatible based on forward voltage (1.8V vs. 1.85V) and dominant wavelength (638nm vs. 640nm) alignment. However, this substitute exhibits significantly reduced brightness (170mcd vs. 5000mcd), wider viewing angle (45° vs. 15°), smaller lens diameter (3.00mm vs. 10.00mm), and reduced physical height (6.00mm vs. 13.50mm). The LTL-4266N is ROHS3 compliant and maintains active product status. Selection of this substitute is constrained to applications where reduced brightness and wider viewing angle are acceptable, and where the smaller physical footprint provides design advantage. PCB layout modifications may be required due to dimensional differences.

Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating and are classified under HTSUS 8541.41.0000.

Frequently Asked Questions (FAQ)

Q: Can the LTL-4266N directly replace the WP813SRC/F in existing designs?

A: Direct replacement is not recommended without design review. While both components share electrical compatibility (forward voltage within 0.05V tolerance) and optical compatibility (red spectral output, 660nm peak wavelength), the LTL-4266N exhibits significantly different optical and mechanical characteristics. The 170mcd brightness rating is 29.4 times lower than the WP813SRC/F (5000mcd), the viewing angle is 3 times wider (45° vs. 15°), and the physical dimensions differ substantially (3.00mm lens diameter vs. 10.00mm, 6.00mm height vs. 13.50mm). PCB footprint compatibility must be verified, and application brightness requirements must be reassessed.

Q: What are the key electrical compatibility criteria for these parts?

A: Both the WP813SRC/F and LTL-4266N operate at forward voltages within 0.05V tolerance (1.85V vs. 1.8V) and share identical test current specifications (20mA). Both components are rated for red spectral output with peak wavelength at 660nm. These electrical parameters allow circuit-level compatibility in current-limiting applications using standard series resistor calculations.

Q: Are there packaging or mounting differences between these parts?

A: Both components use through-hole radial mounting with round domed lens styles. However, the WP813SRC/F features a 10.00mm lens diameter and 13.50mm maximum height, while the LTL-4266N has a 3.00mm lens diameter and 6.00mm maximum height. These dimensional differences require PCB layout verification and may necessitate footprint modifications. The WP813SRC/F is supplied in standard packaging, while the LTL-4266N is supplied in bulk packaging.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the WP813SRC/F and LTL-4266N are ROHS3 compliant, maintain MSL 1 (Unlimited) moisture sensitivity rating, and are classified under HTSUS 8541.41.0000. The WP813SRC/F is REACH Unaffected, while the LTL-4266N is REACH Affected. Both components are classified as EAR99 for export control purposes.

Q: What is the primary limitation of using the LTL-4266N as a substitute?

A: The primary limitation is the significant reduction in brightness output. The LTL-4266N delivers 170mcd compared to the WP813SRC/F's 5000mcd, representing a 96.6% reduction in luminous intensity. This reduction directly impacts visibility in applications requiring high-brightness indication. Additionally, the wider 45° viewing angle of the LTL-4266N may not provide the focused indication characteristics of the 15° viewing angle WP813SRC/F. Application-specific brightness and viewing angle requirements must be evaluated before substitution.

Q: Are there inventory considerations for these parts?

A: The WP813SRC/F has 948 pcs in stock, while the LTL-4266N has significantly higher inventory availability at 52,224 pcs. If supply chain constraints or lead time requirements necessitate substitution, the LTL-4266N's larger inventory may provide procurement advantage, provided that the optical and mechanical differences are acceptable for the application.