SLR-37VR3F Equivalent & Substitute Parts

Part Overview

The SLR-37VR3F is a red diffused LED in 3mm through-hole package manufactured by Rohm Semiconductor. This part is classified as Obsolete, making it necessary to identify equivalent or substitute components for new designs and ongoing production requirements. The part operates at 2V forward voltage with 16mcd brightness rating and 650nm peak wavelength, designed for standard LED indication applications in discrete radial configurations.

Substiute Parts

SLR-37VR3F

Rohm SemiconductorIn Stock: 1147SLR-37VR3F Datasheet

Current PartRFQ

SLR-343VRT32

Rohm SemiconductorIn Stock: 4387SLR-343VRT32 Datasheet

DirectRFQ

1254-10SDRD/S530-A3

Everlight Electronics Co LtdIn Stock: 8661254-10SDRD/S530-A3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLR-37VR3F are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Color: Red
• Lens Transparency: Diffused
• Voltage - Forward (Vf): 2V
• Wavelength - Peak: 650nm
• Mounting Type: Through Hole
• Package / Case: Radial

Secondary Compatibility Criteria:

• Millicandela Rating: 16mcd (or similar brightness range)
• Lens Size: 3.10mm Dia (or equivalent 3mm class)
• Current - Test: 10mA (or compatible test current)
• Height (Max): 5.00mm (or within acceptable mechanical envelope)

The identified substitutes maintain these core electrical and mechanical parameters while accommodating minor variations in packaging format, inventory status, and product lifecycle stage.

Parameter Comparison

Engineering Selection Recommendations

SLR-343VRT32 (Rohm Semiconductor - Direct Substitute)

This part maintains identical electrical specifications (2V forward voltage, 16mcd brightness, 650nm peak wavelength) and mechanical form factor (3.10mm lens diameter, radial package). The SLR-343VRT32 is classified as "Not For New Designs," indicating it remains available for legacy system support and replacement applications. Both parts are ROHS3 compliant with MSL 1 rating. The primary difference is packaging format (Cut Tape vs. standard through-hole) and a marginal height increase of 0.60mm, which is typically acceptable in standard PCB layouts.

1254-10SDRD/S530-A3 (Everlight Electronics - Similar Substitute)

This part provides functional equivalence with matching color, lens transparency, forward voltage, and wavelength specifications. The Everlight component is classified as Active, making it suitable for new designs. Notable differences include reduced brightness (12.5mcd vs. 16mcd), lower test current (2mA vs. 10mA), slightly smaller lens diameter (3.00mm vs. 3.10mm), and marginally increased height (5.20mm vs. 5.00mm). These variations remain within acceptable tolerance for standard LED indication circuits. ROHS3 compliance and MSL 1 rating are maintained.

Frequently Asked Questions (FAQ)

Q: Can SLR-343VRT32 be used as a direct replacement for SLR-37VR3F?

A: Yes. Both parts share identical forward voltage (2V), brightness rating (16mcd), peak wavelength (650nm), lens size (3.10mm), and radial through-hole package configuration. The height difference of 0.60mm is typically accommodated in standard PCB designs. Packaging format differs (Cut Tape vs. standard), but electrical and mechanical performance are equivalent.

Q: What are the trade-offs when using 1254-10SDRD/S530-A3 instead of SLR-37VR3F?

A: The Everlight part maintains voltage, wavelength, and package compatibility but operates at reduced brightness (12.5mcd vs. 16mcd) and lower test current (2mA vs. 10mA). The lens diameter is slightly smaller (3.00mm vs. 3.10mm) and height is marginally increased (5.20mm vs. 5.00mm). These differences are acceptable for applications where the lower brightness is sufficient. The advantage is Active product status, ensuring long-term availability.

Q: Are all substitute parts RoHS compliant?

A: Yes. SLR-37VR3F, SLR-343VRT32, and 1254-10SDRD/S530-A3 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the significance of product status (Obsolete vs. Not For New Designs vs. Active)?

A: Obsolete parts (SLR-37VR3F) are no longer manufactured and have limited availability. Not For New Designs parts (SLR-343VRT32) remain available for legacy support but are not recommended for new product development. Active parts (1254-10SDRD/S530-A3) are in current production and recommended for new designs requiring long-term supply assurance.

Q: Can these parts be used interchangeably in the same circuit?

A: Yes, with consideration for brightness requirements. All three parts operate at 2V forward voltage and are compatible with standard LED indication circuits. If the application requires 16mcd brightness, use SLR-37VR3F or SLR-343VRT32. If 12.5mcd is acceptable, 1254-10SDRD/S530-A3 is suitable and offers the advantage of Active status.

Q: What mechanical considerations apply when substituting these parts?

A: All parts use radial through-hole packages with similar form factors. Height variations (5.00mm to 5.60mm) are typically accommodated in standard PCB layouts. Lens diameter differences (3.00mm to 3.10mm) are negligible for most applications. Verify PCB footprint compatibility before implementation.