SLR-325VRT31 Equivalent & Substitute Parts

Part Overview

The SLR-325VRT31 is a red diffused LED indicator manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This component features a 630nm dominant wavelength with 10mcd brightness rating and 2V forward voltage operation. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent substitute parts is necessary for maintaining existing systems, repair operations, and legacy product support where this component remains in use.

Substiute Parts

SLR-325VRT31

Rohm SemiconductorIn Stock: 975SLR-325VRT31 Datasheet

Current PartRFQ

LTL-709E

Lite-On Inc.In Stock: 3289LTL-709E Datasheet

SimilarRFQ

LTL-816EE

Lite-On Inc.In Stock: 927LTL-816EE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLR-325VRT31 are identified based on the following critical parameters that determine functional compatibility:

• Red color specification (visual indication consistency)
• Forward voltage of 2V (circuit compatibility)
• Through-hole radial mounting configuration (mechanical fit)
• Diffused lens transparency (optical characteristics)
• Test current of 10mA (operational current range)

The substitute parts listed below maintain these core electrical and mechanical parameters within acceptable tolerances for the SLR-325VRT31 application context. Variations in millicandela rating, lens diameter, and viewing angle are noted where they occur, as these parameters may affect visual performance in specific circuit implementations.

Parameter Comparison

Engineering Selection Recommendations

LTL-709E maintains the closest electrical and optical alignment with the SLR-325VRT31. Both components operate at 2V forward voltage with 10mA test current and feature diffused lens transparency. The LTL-709E is currently in active production status, ensuring ongoing availability. The primary mechanical difference is the reduced lens diameter (1.80mm versus 3.20mm) and lower profile height (3.60mm versus 5.70mm), which may require PCB layout verification for through-hole mounting compatibility. The wavelength shift from 630nm to 623nm dominant wavelength remains within the red spectrum range.

LTL-816EE provides an alternative with higher brightness output (29mcd versus 10mcd) and operates at 30mA test current. This component shares the 3.20mm lens diameter and radial through-hole configuration with the original part. The lens type specification (Clear, Tinted) differs from the diffused transparency of the SLR-325VRT31, resulting in different optical dispersion characteristics. The increased current requirement and brightness may necessitate circuit design review to ensure compatibility with existing current-limiting resistor values.

Both substitute parts carry ROHS3 compliance and active product status, supporting long-term supply chain stability for legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Can the LTL-709E directly replace the SLR-325VRT31 without PCB modifications?

A: The LTL-709E maintains electrical compatibility (2V, 10mA) and diffused lens characteristics. However, the reduced lens diameter (1.80mm versus 3.20mm) and lower height profile (3.60mm versus 5.70mm) require verification of the through-hole mounting footprint on the PCB. Physical fit must be confirmed before substitution.

Q: What is the primary difference between the LTL-709E and LTL-816EE substitutes?

A: The LTL-709E operates at 10mA test current with 12.6mcd brightness and maintains diffused lens transparency. The LTL-816EE operates at 30mA test current with 29mcd brightness and features a clear, tinted lens. The LTL-816EE's higher current requirement necessitates circuit design review to ensure existing current-limiting resistors remain appropriate.

Q: Are all substitute parts RoHS compliant?

A: Yes. The SLR-325VRT31, LTL-709E, and LTL-816EE all carry ROHS3 compliance certification, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: Why is the SLR-325VRT31 marked "Not For New Designs"?

A: This designation indicates the component has reached end-of-life status and is no longer recommended for new product development. The listed substitute parts are active products suitable for both legacy system support and new applications.

Q: Do the substitute parts have the same wavelength as the original SLR-325VRT31?

A: The LTL-709E has a dominant wavelength of 623nm (versus 630nm) with peak wavelength of 635nm. The LTL-816EE peak wavelength is 635nm. Both remain within the red spectrum range. Visual color perception differences may be minimal in typical indicator applications.