SLR-37YC3F Equivalent & Substitute Parts

Part Overview

The SLR-37YC3F is a 3mm yellow LED indicator from Rohm Semiconductor designed for through-hole mounting applications. It delivers 25mcd luminous intensity at 2.1V forward voltage with a 55° viewing angle and 585nm peak wavelength. The component is classified as Obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility while accommodating potential variations in mechanical dimensions and performance characteristics.

Substiute Parts

SLR-37YC3F

Rohm SemiconductorIn Stock: 1114SLR-37YC3F Datasheet

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SLR-343YC3F

Rohm SemiconductorIn Stock: 1644SLR-343YC3F Datasheet

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LTL-1CHYE

Lite-On Inc.In Stock: 11260LTL-1CHYE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLR-37YC3F are qualified based on the following critical parameters:

Electrical Compatibility Requirements:

• Color: Yellow
• Voltage - Forward (Vf): 2.1V (matching nominal specification)
• Wavelength - Peak: 585nm (matching optical specification)
• Mounting Type: Through Hole (maintaining PCB assembly compatibility)
• Package / Case: Radial (maintaining lead configuration)

Mechanical Compatibility Considerations:

• Lens Size: 3mm diameter class (allowing minor dimensional variations within standard T-1 envelope)
• Height: Tolerance range accommodating standard through-hole PCB clearances

Compliance Requirements:

• RoHS3 Compliant status maintained across all substitutes
• REACH and ECCN classifications verified for regulatory alignment

Substitutes may vary in millicandela rating, viewing angle, and test current within the constraints of the yellow LED indicator category, provided electrical and mechanical interfaces remain compatible with the original design.

Parameter Comparison

Engineering Selection Recommendations

SLR-343YC3F (Rohm Semiconductor): This part maintains identical electrical specifications (2.1V, 10mA test current, 585nm wavelength) and radial through-hole package configuration. The 16mcd rating is lower than the original 25mcd, and the 40° viewing angle is narrower than the original 55°. Height increases to 5.60mm. Product status is Not For New Designs, indicating limited long-term availability. Selection is appropriate for direct replacement in applications where reduced brightness and narrower viewing angle are acceptable.

LTL-1CHYE (Lite-On Inc.): This part maintains identical electrical specifications (2.1V forward voltage, 585nm wavelength) and radial through-hole package configuration. The 40mcd rating exceeds the original 25mcd specification, and the 45° viewing angle is narrower than the original 55°. Test current is specified at 20mA versus the original 10mA. Product status is Active, indicating current manufacturing and long-term availability. Height is 5.20mm. Selection is appropriate for applications requiring higher brightness output and extended component lifecycle support.

Frequently Asked Questions (FAQ)

Q: Can SLR-343YC3F be used as a direct replacement for SLR-37YC3F?

A: Yes, within application constraints. Both parts share identical forward voltage (2.1V), test current (10mA), and peak wavelength (585nm). The SLR-343YC3F produces lower luminous intensity (16mcd vs. 25mcd) and has a narrower viewing angle (40° vs. 55°). Height increases from 5.00mm to 5.60mm. Verify that reduced brightness and viewing angle do not impact circuit function before substitution.

Q: Can LTL-1CHYE be used as a direct replacement for SLR-37YC3F?

A: Yes, within application constraints. Both parts share identical forward voltage (2.1V) and peak wavelength (585nm). The LTL-1CHYE produces higher luminous intensity (40mcd vs. 25mcd) and operates at 20mA test current versus the original 10mA. Viewing angle is narrower (45° vs. 55°). Height is 5.20mm. Verify that increased current draw and higher brightness do not impact circuit design before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. SLR-343YC3F and LTL-1CHYE are both ROHS3 Compliant, maintaining regulatory alignment with the original SLR-37YC3F.

Q: What is the primary difference between the two substitute options?

A: SLR-343YC3F maintains the original 10mA test current but delivers lower brightness (16mcd). LTL-1CHYE delivers higher brightness (40mcd) but requires 20mA test current. LTL-1CHYE has Active product status, while SLR-343YC3F is Not For New Designs. Select based on brightness requirements and long-term availability needs.

Q: Do all parts use the same through-hole radial package?

A: Yes. All three parts use radial through-hole mounting with 3mm-class lens diameters. Height variations (5.00mm, 5.60mm, 5.20mm) are within standard PCB clearance tolerances for through-hole components.