FKR3863X Equivalent & Substitute Parts Reference

Part Overview

The FKR3863X is a red LED indication component manufactured by Stanley Electric Co, designed for through-hole mounting applications. This discrete 2.2V radial LED features a 625nm dominant wavelength with 2800mcd brightness rating and a clear round domed lens of 3.10mm diameter. The product is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

FKR3863X

Stanley Electric CoIn Stock: 1119FKR3863X Datasheet

Current PartRFQ

SLI-343U8RC3F

Rohm SemiconductorIn Stock: 1585SLI-343U8RC3F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FKR3863X is determined by the following critical parameters:

Electrical Compatibility Parameters:

• Forward voltage (Vf) of 2.2V nominal
• Test current of 20mA
• Red color specification (620-625nm dominant wavelength range)

Mechanical Compatibility Parameters:

• Through-hole radial mounting configuration
• 3.10mm diameter lens size
• Round domed lens style
• Physical dimensions compatible with standard PCB footprints

Regulatory Compliance Parameters:

• RoHS compliance status
• REACH compliance status

The substitute part SLI-343U8RC3F from Rohm Semiconductor meets the core electrical and mechanical requirements for direct substitution. Both components share identical forward voltage, test current, lens size, mounting type, and lens style specifications. Wavelength values (625nm vs 620nm dominant) fall within the acceptable red LED spectrum range for indication applications.

Parameter Comparison

Engineering Selection Recommendations

The SLI-343U8RC3F from Rohm Semiconductor is a qualified substitute for the obsolete FKR3863X based on the following engineering criteria:

Electrical Equivalence: Both components operate at identical forward voltage (2.2V) and test current (20mA), ensuring direct circuit compatibility without modification to current-limiting resistor calculations or power supply specifications.

Mechanical Compatibility: Identical lens diameter (3.10mm), lens style (round domed), and through-hole radial mounting configuration ensure PCB footprint compatibility. The substitute component is 0.80mm shorter in maximum height, which presents no mechanical interference issues in standard applications.

Regulatory Status: The SLI-343U8RC3F holds current ROHS3 compliance certification and REACH unaffected status, meeting modern regulatory requirements. The main part FKR3863X is RoHS compliant and REACH unaffected, confirming environmental compliance alignment.

Product Availability: The substitute part is classified as active product status with 1545 pieces in stock, providing reliable supply continuity compared to the obsolete main part with limited remaining inventory of 1027 pieces.

Brightness Consideration: The substitute component has a lower millicandela rating (330mcd vs 2800mcd). This difference must be evaluated against specific application brightness requirements for indication purposes.

Frequently Asked Questions (FAQ)

Q: Can SLI-343U8RC3F be used as a direct replacement for FKR3863X without circuit modifications?

A: Yes, for electrical circuit operation. Both components share identical forward voltage (2.2V) and test current (20mA) specifications, eliminating the need for resistor or power supply adjustments. However, the brightness difference (330mcd vs 2800mcd) must be assessed for your specific indication application requirements.

Q: What is the primary difference between these two components?

A: The main difference is the millicandela rating. The FKR3863X provides 2800mcd brightness, while the SLI-343U8RC3F provides 330mcd. Both are red LEDs with identical electrical parameters and mechanical form factors. The wavelength differs slightly (625nm vs 620nm dominant), but both fall within the standard red LED spectrum.

Q: Will the SLI-343U8RC3F fit the same PCB footprint as FKR3863X?

A: Yes. Both components have identical lens diameter (3.10mm), lens style (round domed), and radial through-hole mounting configuration. The substitute is 0.80mm shorter in maximum height (5.60mm vs 6.40mm), which does not affect PCB compatibility or standard mounting procedures.

Q: Is the SLI-343U8RC3F compliant with current environmental regulations?

A: Yes. The SLI-343U8RC3F is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original FKR3863X is RoHS compliant and REACH unaffected, confirming environmental compliance alignment between both components.

Q: What is the viewing angle specification for the substitute part?

A: The SLI-343U8RC3F has a specified viewing angle of 40°. The original FKR3863X viewing angle specification was not provided in the available data.

Q: Why is the FKR3863X classified as obsolete?

A: The FKR3863X is listed as obsolete product status, indicating it has been discontinued by the manufacturer. The SLI-343U8RC3F from Rohm Semiconductor is an active product with current manufacturing and supply availability.