WP793SRC/D Equivalent & Substitute Parts Reference

Part Overview

The WP793SRC/D is an 8mm round through-hole red LED indicator manufactured by Kingbright, featuring a clear domed lens and 640nm dominant wavelength. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part delivers 800mcd luminous intensity at 20mA test current with a 1.85V forward voltage and 15° viewing angle. Substitute parts are selected based on matching electrical characteristics, mechanical compatibility, and functional performance within the red LED indicator category.

Substiute Parts

WP793SRC/D

KingbrightIn Stock: 983WP793SRC/D Datasheet

Current PartRFQ

WP793SURCK

KingbrightIn Stock: 961WP793SURCK Datasheet

MFR RecommendedRFQ

6324-15SURC/S400-A9

Everlight Electronics Co LtdIn Stock: 8936324-15SURC/S400-A9 Datasheet

SimilarRFQ

LTL-4266N

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

SimilarRFQ

LTL-4266NR

Lite-On Inc.In Stock: 1167LTL-4266NR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WP793SRC/D are classified into two categories based on compatibility with the primary design parameters:

Category 1: Direct Manufacturer Upgrade (Recommended Substitute) WP793SURCK represents the active production equivalent from Kingbright. This part maintains the 8.00mm lens diameter, through-hole mounting, and radial package configuration. Electrical parameters differ within acceptable ranges: forward voltage increases from 1.85V to 1.95V, and luminous intensity increases from 800mcd to 9000mcd. The dominant wavelength shifts from 640nm to 630nm, remaining within the red spectrum. This part is active in production status and ROHS3 compliant.

Category 2: Similar Functional Substitutes (Alternative Options) Parts LTL-4266N, LTL-4266NR, and 6324-15SURC/S400-A9 provide functional red LED indication but with modified mechanical and optical characteristics. These parts differ in lens size (3.00mm to 4.60mm diameter), height profile, and viewing angle (45° to 100°), requiring PCB layout and optical design verification. All maintain through-hole mounting and red color specification.

Key Parameters Determining Substitution Validity:

• Color: Red (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• Lens Transparency: Clear (mandatory match)
• Forward Voltage (Vf): 1.8V to 2.0V range (acceptable tolerance)
• Current - Test: 20mA (standard reference condition)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: WP793SURCK

WP793SURCK is the recommended substitute for WP793SRC/D applications. This part maintains identical mechanical compatibility with 8.00mm lens diameter and through-hole radial mounting. The forward voltage tolerance of 1.95V versus 1.85V represents a 5.4% increase, which is acceptable within standard LED circuit design margins. The luminous intensity increase from 800mcd to 9000mcd provides enhanced brightness performance. WP793SURCK is active in production status with ROHS3 compliance and 933 pieces in current inventory, ensuring supply continuity.

Secondary Selection: LTL-4266N or LTL-4266NR

These Lite-On parts serve as functional alternatives where mechanical constraints permit lens size reduction to 3.00mm diameter. Both parts maintain the 1.8V forward voltage specification and ROHS3 compliance. LTL-4266N offers 52,224 pieces in inventory with unlimited moisture sensitivity rating (MSL 1). LTL-4266NR provides 1,090 pieces with MSL 2A rating. The 45° viewing angle and 170mcd intensity represent reduced optical performance compared to the main part, suitable for applications with relaxed brightness requirements and wider viewing angle tolerance.

Tertiary Selection: 6324-15SURC/S400-A9

The Everlight part provides an alternative with 4.60mm lens diameter and 100° viewing angle, accommodating applications requiring wide-angle light distribution. The 2V forward voltage and 320mcd intensity differ from the main part specification. This option requires verification of PCB layout compatibility due to reduced height (4.90mm) and modified lens geometry. RoHS compliance status is not specified in available documentation.

Selection Criteria Summary:

• Active production status required for supply assurance
• ROHS3 compliance mandatory for regulatory adherence
• Mechanical fit verification necessary for lens size variants
• Forward voltage tolerance within ±10% acceptable for standard LED circuits
• Luminous intensity variation acceptable based on application requirements

Frequently Asked Questions (FAQ)

Q1: Can WP793SURCK directly replace WP793SRC/D without circuit modification?

WP793SURCK operates at 1.95V forward voltage compared to 1.85V for WP793SRC/D. This 0.1V difference is within typical LED circuit design tolerance and does not require circuit modification. Current-limiting resistor values calculated for 1.85V will operate the WP793SURCK within acceptable parameters. Verify that the circuit power supply and resistor values accommodate the slightly higher voltage drop.

Q2: What are the mechanical compatibility considerations when substituting with LTL-4266N?

LTL-4266N features a 3.00mm lens diameter compared to 8.00mm for WP793SRC/D. This requires PCB footprint modification and potential mechanical redesign of any lens housing or optical components. The reduced height (6.00mm versus 11.00mm) may affect board-level clearance. The 45° viewing angle differs from the 15° specification, altering light distribution characteristics. PCB layout and optical design verification is mandatory before implementation.

Q3: How do luminous intensity differences affect application performance?

WP793SURCK delivers 9000mcd versus 800mcd for WP793SRC/D, representing an 11.25x brightness increase. This enhanced intensity improves visibility in high-ambient-light environments and permits operation at reduced current levels if brightness reduction is desired. LTL-4266N and LTL-4266NR provide 170mcd, suitable only for applications with relaxed brightness requirements or close-proximity viewing. Application-specific brightness requirements determine appropriate substitute selection.

Q4: Are all substitute parts ROHS3 compliant?

WP793SURCK, LTL-4266N, and LTL-4266NR are confirmed ROHS3 compliant. The 6324-15SURC/S400-A9 RoHS compliance status is not specified in available documentation. Regulatory compliance verification is required before selecting 6324-15SURC/S400-A9 for applications subject to ROHS3 requirements.

Q5: What viewing angle considerations apply to substitute selection?

WP793SRC/D and WP793SURCK both specify 15° viewing angle, providing narrow-beam light distribution suitable for indicator applications requiring directional visibility. LTL-4266N and LTL-4266NR provide 45° viewing angle, expanding light distribution to wider viewing zones. The 6324-15SURC/S400-A9 offers 100° viewing angle for applications requiring omnidirectional light distribution. Application optical requirements determine appropriate viewing angle specification.

Q6: How does wavelength variation affect color perception?

WP793SRC/D specifies 640nm dominant wavelength (655nm peak). WP793SURCK shifts to 630nm dominant (645nm peak), remaining within the red spectrum with slightly increased orange tone. LTL-4266N and LTL-4266NR specify 638nm dominant (660nm peak), providing red color perception consistent with the main part. The 6324-15SURC/S400-A9 specifies 624nm dominant (632nm peak), representing the most orange-shifted variant. Color-critical applications require wavelength verification against application specifications.

Q7: What inventory and supply considerations apply?

WP793SRC/D is obsolete with 928 pieces in current stock. WP793SURCK is active production with 933 pieces available, providing immediate supply continuity. LTL-4266N offers 52,224 pieces in inventory, ensuring long-term availability. LTL-4266NR provides 1,090 pieces. The 6324-15SURC/S400-A9 offers 861 pieces. Supply chain planning should prioritize active production parts (WP793SURCK, LTL-4266N, LTL-4266NR) over obsolete specifications.