SLR-37MG3F Equivalent & Substitute Parts

Part Overview

The SLR-37MG3F is a 3mm green diffused LED from Rohm Semiconductor designed for indication applications. This part operates at 2.1V forward voltage with a 25mcd brightness rating and features a through-hole radial package. The product is currently obsolete, making identification of compatible substitute components essential for ongoing production support, maintenance, and design continuity.

Substiute Parts

SLR-37MG3F

Rohm SemiconductorIn Stock: 1013SLR-37MG3F Datasheet

Current PartRFQ

SLR-343MCT32

Rohm SemiconductorIn Stock: 7724SLR-343MCT32 Datasheet

SimilarRFQ

XLUG11D

SunLEDIn Stock: 20114XLUG11D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLR-37MG3F is determined by the following critical parameters:

• Color and Wavelength: Green indication (peak wavelength 563nm)
• Lens Transparency: Diffused or clear lens acceptable for indication applications
• Electrical Characteristics: Forward voltage 2.0V to 2.1V; test current 10mA
• Brightness: Millicandela rating 24mcd to 25mcd
• Mounting Configuration: Through-hole radial package, 3mm T-1 form factor
• Compliance: ROHS3 compliant; REACH unaffected; MSL 1 (Unlimited)

The identified substitute parts meet these criteria while maintaining functional equivalence for indication circuit applications.

Parameter Comparison

Engineering Selection Recommendations

SLR-343MCT32 (Rohm Semiconductor): This substitute maintains identical electrical specifications (2.1V, 10mA, 25mcd) and mechanical form factor as the SLR-37MG3F. The primary difference is lens transparency (clear vs. diffused), which affects light distribution characteristics. This part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Selection is appropriate where clear lens optics are acceptable for the indication function.

XLUG11D (SunLED): This substitute provides equivalent green indication capability with closely matched electrical parameters (2V forward voltage, 10mA test current, 24mcd brightness). Peak wavelength differs slightly (565nm vs. 563nm), remaining within the green spectrum for indication applications. Height is 0.4mm lower than the original part. This part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Selection is appropriate where minor wavelength and height variations are acceptable.

Both substitutes are active products with current manufacturing support and full compliance certifications, providing long-term availability for replacement and new designs.

Frequently Asked Questions (FAQ)

Q: Can SLR-343MCT32 directly replace SLR-37MG3F in existing designs?

A: SLR-343MCT32 is electrically and mechanically compatible. The clear lens differs from the diffused lens of the original part, resulting in different light distribution patterns. Circuit-level compatibility is maintained; optical appearance will differ.

Q: What is the significance of the wavelength difference between SLR-37MG3F (563nm) and XLUG11D (565nm)?

A: Both wavelengths fall within the green spectrum for indication applications. The 2nm difference is not significant for standard indication circuits and does not affect functional compatibility.

Q: Are there height differences that affect PCB layout?

A: Yes. SLR-37MG3F maximum height is 5.00mm, SLR-343MCT32 is 5.60mm, and XLUG11D is 4.60mm. Height variations may impact clearance in confined spaces but do not affect electrical function.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent compliance for regulated applications.

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

A: Diffused lenses scatter light over a wider viewing angle with softer appearance; clear lenses provide more directional light output with higher intensity in the forward direction. Both are suitable for indication applications depending on optical requirements.

Q: Which substitute offers the closest match to the original SLR-37MG3F?

A: SLR-343MCT32 provides the closest electrical match (identical 2.1V, 25mcd specifications). XLUG11D offers the closest lens transparency match (diffused) with slightly lower brightness (24mcd) and forward voltage (2V).