SLR-332YYT32 Equivalent & Substitute Parts

Part Overview

The SLR-332YYT32 is a yellow diffused LED indicator manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This T-1 package component operates at 2.1V forward voltage with a 10mA test current and delivers 6.3mcd luminous intensity at a dominant wavelength of 587nm. The product is currently active and ROHS3 compliant, making it suitable for modern electronic assemblies. Identifying equivalent substitute parts is necessary to ensure supply chain continuity, optimize inventory management, and maintain design flexibility across manufacturing batches.

Substiute Parts

SLR-332YYT32

Rohm SemiconductorIn Stock: 936SLR-332YYT32 Datasheet

Current PartRFQ

LTL-4251N

Lite-On Inc.In Stock: 32787LTL-4251N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLR-332YYT32 is determined by strict alignment of the following critical parameters:

• Color and Wavelength: Yellow indication with dominant wavelength in the 587–588nm range
• Electrical Characteristics: Forward voltage of 2.1V and test current of 10mA
• Optical Properties: Diffused lens transparency for uniform light distribution
• Mechanical Compatibility: Through-hole radial mounting in T-1 package configuration
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The LTL-4251N from Lite-On Inc. meets these substitution criteria. Both components share identical forward voltage, test current, color classification, lens transparency, mounting type, and regulatory compliance status. Minor variations in millicandela rating (5.6mcd vs. 6.3mcd), viewing angle (60° vs. 85°), and physical height (5.85mm vs. 4.60mm) are within acceptable tolerance ranges for general indication applications but must be evaluated against specific circuit design requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the SLR-332YYT32 and LTL-4251N are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. Selection between these components should be based on application-specific requirements:

The SLR-332YYT32 provides higher luminous intensity (6.3mcd) and a wider viewing angle (85°), making it suitable for applications requiring greater visibility across a broader field of view. The LTL-4251N offers a narrower viewing angle (60°) and lower luminous intensity (5.6mcd), appropriate for applications where directional indication is preferred or where brightness reduction is beneficial.

Physical height differences (4.60mm vs. 5.85mm) must be evaluated against PCB layout constraints and enclosure clearance requirements. Both components operate at identical electrical parameters (2.1V forward voltage, 10mA test current), ensuring circuit-level compatibility when substituted.

Frequently Asked Questions (FAQ)

Q: Can the LTL-4251N directly replace the SLR-332YYT32 in existing designs?

A: Direct substitution is electrically feasible due to matching forward voltage (2.1V) and test current (10mA). However, differences in luminous intensity, viewing angle, and physical height must be evaluated against specific application requirements. PCB layout and enclosure clearance should be verified before implementation.

Q: What are the key differences between these two yellow LEDs?

A: The primary differences are luminous intensity (SLR-332YYT32: 6.3mcd vs. LTL-4251N: 5.6mcd), viewing angle (85° vs. 60°), and maximum height (4.60mm vs. 5.85mm). Both share identical color, lens transparency, mounting type, package configuration, and electrical characteristics.

Q: Are both components compliant with current regulatory standards?

A: Yes. Both the SLR-332YYT32 and LTL-4251N are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and assembly.

Q: How do wavelength specifications compare?

A: The SLR-332YYT32 has a dominant wavelength of 587nm, while the LTL-4251N is specified at 588nm. This 1nm difference is within the yellow spectrum range and does not affect functional compatibility for indication applications.

Q: What packaging formats are available for these components?

A: The SLR-332YYT32 is supplied in Tape & Box (TB) packaging, while the LTL-4251N is available in Bulk packaging. Both use the T-1 radial package configuration for through-hole mounting.