SLC-22MG3F Equivalent & Substitute Parts

Part Overview

The SLC-22MG3F is a green diffused through-hole LED manufactured by Rohm Semiconductor, designed for indication applications with a dominant wavelength of 572nm and a forward voltage of 2.1V at 10mA test current. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production, maintenance, and design updates. The radial package configuration and 2.00mm lens diameter establish the mechanical compatibility baseline for identifying suitable alternatives.

Substiute Parts

SLC-22MG3F

Rohm SemiconductorIn Stock: 945SLC-22MG3F Datasheet

Current PartRFQ

LTL-1234A

Lite-On Inc.In Stock: 1062LTL-1234A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLC-22MG3F is determined by the following critical parameters:

• Color and Wavelength: Green spectrum (dominant wavelength 569–572nm) for visual indication compatibility
• Lens Configuration: Diffused lens with 2.00mm diameter for optical consistency
• Electrical Characteristics: Forward voltage of 2.1V and through-hole radial mounting for circuit integration
• Mechanical Compatibility: Radial package and similar physical dimensions for PCB layout compatibility
• Regulatory Compliance: ROHS3 compliance and EAR99 classification for supply chain continuity

The LTL-1234A from Lite-On Inc. meets these substitution criteria with compatible electrical and mechanical specifications, though with variations in test current, millicandela rating, and height that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The LTL-1234A is a valid substitute for the obsolete SLC-22MG3F based on matching electrical characteristics (2.1V forward voltage, through-hole radial mounting) and regulatory compliance (ROHS3 Compliant, EAR99 classification). The substitute maintains green diffused lens configuration with identical 2.00mm diameter, ensuring mechanical compatibility in existing PCB layouts.

Key differences requiring evaluation:

• Test Current: The LTL-1234A operates at 20mA test current versus 10mA for the original part. Circuit designs must accommodate this higher current specification.
• Brightness: The LTL-1234A provides 3.7mcd versus 2.5mcd on the original, resulting in increased luminous intensity suitable for indication applications.
• Wavelength: The 569nm dominant wavelength on the substitute is within acceptable green spectrum variation (3nm difference) for visual indication purposes.
• Height: The 6.00mm maximum height on the substitute exceeds the original 5.70mm by 0.30mm. PCB clearance and mechanical constraints must be verified.
• Product Status: The LTL-1234A is active production, ensuring long-term availability and supply chain stability compared to the obsolete original.

Frequently Asked Questions (FAQ)

Q: Can the LTL-1234A directly replace the SLC-22MG3F in existing designs?

A: The LTL-1234A is mechanically and electrically compatible for through-hole PCB mounting with matching 2.1V forward voltage and 2.00mm lens diameter. However, circuit designs must accommodate the higher 20mA test current specification and verify that the 0.30mm height increase does not conflict with mechanical clearances or enclosure constraints.

Q: What is the wavelength difference between these parts?

A: The SLC-22MG3F has a dominant wavelength of 572nm, while the LTL-1234A is 569nm. This 3nm variation remains within the green spectrum and does not affect visual indication functionality for standard applications.

Q: Are both parts RoHS compliant?

A: Yes, both the SLC-22MG3F and LTL-1234A are ROHS3 Compliant, meeting environmental and regulatory requirements for electronic component manufacturing and supply.

Q: What is the brightness difference?

A: The LTL-1234A provides 3.7mcd compared to 2.5mcd on the original SLC-22MG3F. This 48% increase in luminous intensity may require circuit current limiting adjustments to maintain consistent brightness in the application.

Q: Is the radial package identical between both parts?

A: Both parts use radial through-hole packages with 2.00mm diffused green lenses. The primary dimensional difference is the maximum height: 5.70mm for the SLC-22MG3F and 6.00mm for the LTL-1234A. PCB layout and mechanical clearance verification is required.

Q: Why is the original part obsolete?

A: The SLC-22MG3F is classified as obsolete by Rohm Semiconductor. The LTL-1234A from Lite-On Inc. is an active production alternative that maintains functional and mechanical compatibility while ensuring ongoing component availability.