SLA-370LT3F Equivalent & Substitute Parts

Part Overview

The SLA-370LT3F is a red LED indication component manufactured by Rohm Semiconductor, configured as a 3mm T-1 through-hole radial device. This part is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The component delivers 100mcd brightness at 1.75V forward voltage with a 25° viewing angle, suitable for standard indicator applications requiring discrete red LED functionality.

Substiute Parts

SLA-370LT3F

Rohm SemiconductorIn Stock: 1175SLA-370LT3F Datasheet

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SLI-343V8RC3F

Rohm SemiconductorIn Stock: 10059SLI-343V8RC3F Datasheet

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SSL-LX306F4SRD

Lumex Opto/Components Inc.In Stock: 1075SSL-LX306F4SRD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLA-370LT3F are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Color: Red
• Mounting Type: Through Hole
• Package / Case: Radial
• Lens Size: 3mm or 3.10mm T-1 configuration
• Voltage - Forward (Vf): Range 1.7V to 2.2V
• Current - Test: 20mA
• RoHS Status: ROHS3 Compliant

Acceptable Variation Parameters:

• Millicandela Rating: 100mcd to 330mcd (brightness variation acceptable for indication applications)
• Viewing Angle: 25° to 60° (wider angles provide greater visibility)
• Wavelength - Peak: 630nm to 660nm (red spectrum range)
• Height (Max): 5.25mm to 6.00mm (within standard through-hole component tolerances)

Substitute parts must maintain through-hole radial configuration and red color specification. Forward voltage tolerance of ±0.5V and brightness variation within the 100mcd to 330mcd range are acceptable for standard LED indication circuits.

Parameter Comparison

Engineering Selection Recommendations

SLI-343V8RC3F (Rohm Semiconductor): This substitute maintains Rohm Semiconductor manufacturing continuity with active product status. Forward voltage of 2.2V represents a 0.45V increase from the main part; circuit design must accommodate this voltage differential. Brightness rating of 330mcd provides enhanced luminous intensity compared to the 100mcd main part. The 40° viewing angle exceeds the main part specification. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) match the main part certifications.

SSL-LX306F4SRD (Lumex Opto/Components Inc.): This substitute provides closest electrical alignment with forward voltage of 1.7V, representing only a 0.05V deviation from the main part. Millicandela rating matches the main part at 100mcd. The 60° viewing angle provides wider visibility than the main part. Height specification of 6.00mm remains within acceptable through-hole component tolerances. ROHS3 compliance and unlimited MSL rating match the main part. Active product status ensures ongoing availability.

Both substitutes maintain through-hole radial configuration, red color specification, and 20mA test current compatibility with the SLA-370LT3F.

Frequently Asked Questions (FAQ)

Q: Can the SLI-343V8RC3F replace the SLA-370LT3F in existing designs without circuit modification?

A: The SLI-343V8RC3F operates at 2.2V forward voltage compared to the main part's 1.75V. Circuits designed for the main part must be evaluated for the additional 0.45V voltage drop. Current-limiting resistor values may require adjustment to maintain proper LED operation at 20mA test current.

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

A: The SSL-LX306F4SRD provides closer electrical compatibility with 1.7V forward voltage and 100mcd brightness matching the main part specifications. The SLI-343V8RC3F offers higher brightness at 330mcd with 2.2V forward voltage and represents a Rohm Semiconductor product line continuation.

Q: Are both substitutes compatible with the same PCB footprint as the SLA-370LT3F?

A: All three parts use through-hole radial configuration with 3mm or 3.10mm T-1 lens sizes. Height variations (5.25mm to 6.00mm) remain within standard through-hole component tolerances. PCB footprint compatibility depends on specific lead spacing and hole diameter specifications not provided in this reference.

Q: Do the substitute parts maintain the same compliance certifications?

A: Both substitutes are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the main part certifications. REACH status is unaffected for all three parts.

Q: What viewing angle considerations apply when selecting a substitute?

A: The main part specifies 25° viewing angle. The SLI-343V8RC3F provides 40° viewing angle, and the SSL-LX306F4SRD provides 60° viewing angle. Wider viewing angles increase visibility but may affect application-specific optical requirements. Circuit design should confirm that increased viewing angle does not compromise intended indicator functionality.