SLR-37DU3F Equivalent & Substitute Parts

Part Overview

The SLR-37DU3F is an orange LED indication component manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The component operates at 2V forward voltage with a 10mA test current and delivers 10 millicandela brightness in a diffused 3mm lens configuration.

Substiute Parts

SLR-37DU3F

Rohm SemiconductorIn Stock: 1161SLR-37DU3F Datasheet

Current PartRFQ

WP132XNT

KingbrightIn Stock: 2134WP132XNT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SLR-37DU3F is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Orange
• Mounting Type: Through Hole (Radial configuration)
• Lens Size: 3mm class
• Forward Voltage (Vf): 2V nominal range
• Test Current: 10-20mA operational range
• Wavelength: 600-620nm peak range
• RoHS3 Compliance: Required
• REACH Unaffected: Required

The WP132XNT from Kingbright meets these substitution criteria with allowable parameter variations within standard LED specification tolerances.

Parameter Comparison

Engineering Selection Recommendations

The WP132XNT is an active production component from Kingbright that satisfies the core electrical and mechanical requirements for substitution of the obsolete SLR-37DU3F. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Parameter deviations between the main part and substitute are within acceptable ranges for LED indication applications:

• Forward voltage differential of 0.05V is within standard LED tolerance
• Millicandela increase from 10mcd to 20mcd provides enhanced brightness
• Lens transparency change from diffused to clear alters light distribution characteristics
• Viewing angle reduction from 55° to 50° represents a minor change in beam width
• Peak wavelength variance of 3nm remains within orange spectrum classification
• Physical height increase of 0.20mm is negligible for through-hole mounting

The WP132XNT is suitable for direct substitution in applications where the enhanced brightness and clear lens characteristics are compatible with circuit design requirements.

Frequently Asked Questions (FAQ)

Q: Can the WP132XNT directly replace the SLR-37DU3F without circuit modification?

A: The WP132XNT is electrically compatible within standard LED operating parameters. Circuit validation is required to confirm that the increased brightness (20mcd vs. 10mcd) and clear lens transparency are acceptable for the intended application. Forward voltage and test current specifications are within compatible ranges.

Q: What is the primary difference between the diffused and clear lens versions?

A: The SLR-37DU3F features a diffused lens that scatters light over a wider area, while the WP132XNT has a clear lens that produces more focused light output. This affects visual appearance and brightness perception in the application.

Q: Are both components suitable for high-temperature applications?

A: Both components carry identical moisture sensitivity level (MSL 1 - Unlimited) and compliance certifications. Thermal performance specifications are not provided in the available parameters; thermal requirements must be evaluated against detailed datasheets.

Q: What is the significance of the T-1 package designation on the WP132XNT?

A: T-1 is a standard through-hole LED package designation indicating a 3mm lens diameter. This is compatible with the 3.10mm lens size of the SLR-37DU3F for mounting purposes.

Q: Are there inventory considerations for this substitution?

A: The WP132XNT is listed as active production status with 2085 pieces in stock, compared to the obsolete SLR-37DU3F with 1104 pieces available. The substitute offers superior long-term availability for ongoing production requirements.