SLR-37MC3F Equivalent & Substitute Parts

Part Overview

The SLR-37MC3F is a green LED indication component manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This part is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance requirements. The component features a 3mm clear lens with 25mcd brightness rating and operates at 2.1V forward voltage with 10mA test current.

Substiute Parts

SLR-37MC3F

Rohm SemiconductorIn Stock: 996SLR-37MC3F Datasheet

Current PartRFQ

SLR-343MC3F

Rohm SemiconductorIn Stock: 747SLR-343MC3F Datasheet

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LTL-4232N

Lite-On Inc.In Stock: 18882LTL-4232N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLR-37MC3F is determined by the following critical parameters:

• Color and Lens Transparency: Green color with clear lens (visual and spectral consistency)
• Voltage - Forward (Vf): 2.1V nominal operation
• Mounting Type: Through-hole radial configuration
• Lens Size: 3mm diameter class
• Package / Case: Radial through-hole package
• RoHS Compliance: ROHS3 Compliant status

The identified substitute parts meet these core electrical and mechanical criteria, enabling direct functional replacement in circuit applications designed for the SLR-37MC3F.

Parameter Comparison

Engineering Selection Recommendations

SLR-343MC3F (Rohm Semiconductor): This substitute maintains identical electrical specifications (2.1V, 10mA test current, 25mcd) and mechanical form factor as the SLR-37MC3F. The part is classified as Not For New Designs, indicating limited future availability. Selection is appropriate for legacy system maintenance where exact parameter matching is required.

LTL-4232N (Lite-On Inc.): This substitute provides active product status with higher brightness output (40mcd versus 25mcd) and elevated test current specification (20mA versus 10mA). The part maintains 2.1V forward voltage and through-hole radial mounting compatibility. ROHS3 compliance and active product status support long-term supply chain viability. Selection is suitable for applications where increased luminous intensity is acceptable and circuit design accommodates the higher test current specification.

Frequently Asked Questions (FAQ)

Q: Can the SLR-37MC3F be replaced with the SLR-343MC3F? A: Yes. Both parts share identical forward voltage (2.1V), test current (10mA), brightness rating (25mcd), and through-hole radial package configuration. Mechanical dimensions differ slightly (5.00mm versus 5.60mm height), requiring verification of PCB layout clearance.

Q: What are the key differences between SLR-343MC3F and LTL-4232N? A: The LTL-4232N provides higher brightness (40mcd versus 25mcd) and operates at elevated test current (20mA versus 10mA). Both maintain 2.1V forward voltage and through-hole mounting. The LTL-4232N has active product status, while SLR-343MC3F is Not For New Designs. Height specifications differ (5.60mm versus 5.85mm).

Q: Are all substitute parts RoHS3 compliant? A: Yes. SLR-37MC3F, SLR-343MC3F, and LTL-4232N are all ROHS3 Compliant.

Q: Which substitute part offers the best long-term availability? A: The LTL-4232N maintains Active product status, indicating ongoing manufacturing and supply chain support. The SLR-343MC3F is classified as Not For New Designs, suggesting limited future availability.

Q: Can the LTL-4232N be used as a direct drop-in replacement? A: The LTL-4232N is mechanically compatible (through-hole radial package, 3mm lens size) and electrically compatible (2.1V forward voltage). Circuit design must accommodate the higher test current specification (20mA versus 10mA) and increased brightness output (40mcd versus 25mcd).