SLR-343PC3F Equivalent & Substitute Parts

Part Overview

The SLR-343PC3F is a green 560nm LED indication component manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This part operates at 2.1V forward voltage with a 6.3mcd brightness rating and features a 3.10mm domed lens with 40° viewing angle. The product is designated as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Key Parameters

Parameter	SLR-343PC3F
Manufacturer	Rohm Semiconductor
Color	Green
Wavelength - Dominant	560nm
Voltage - Forward (Vf) Typical	2.1V
Current - Test	10mA
Millicandela Rating	6.3mcd
Lens Size	3.10mm Dia
Viewing Angle	40°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	5.60mm
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the SLR-343PC3F is determined by the following critical parameters:

Color: Green (560nm dominant wavelength range)
Forward Voltage (Vf): 2.1V nominal
Mounting Type: Through Hole Radial
Lens Configuration: Domed top, clear lens
Package Type: Radial through-hole

Parts are grouped into two categories:

Direct Manufacturer Equivalent: RLI-343P8C3F from Rohm Semiconductor maintains the same series designation and electrical characteristics.

Cross-Manufacturer Substitutes: Parts from Bivar Inc., Broadcom Limited, and Fairchild Semiconductor that meet the electrical and mechanical compatibility criteria. These parts operate at identical forward voltage (2.1V), feature green color emission, and use compatible through-hole radial packaging. Wavelength variations within the green spectrum (560nm–575nm) and brightness differences are acceptable within the substitute category, as they do not affect circuit-level compatibility.

Non-Compatible Alternatives: The Everlight Electronics parts (1224SYGC/S530-E2 and 264-7SYGC/S530-E2) emit yellow-green (573nm) rather than pure green and are listed for reference only; they represent a different color family and should not be used as direct substitutes in applications requiring green indication.

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength (nm)	Vf (Typ)	Test Current	Brightness (mcd)	Lens Size	Viewing Angle	Height (Max)	Product Status	RoHS
SLR-343PC3F	Rohm Semiconductor	Green	560	2.1V	10mA	6.3	3.10mm	40°	5.60mm	Last Time Buy	ROHS3
RLI-343P8C3F	Rohm Semiconductor	Green	—	2.1V	—	—	—	—	—	Active	—
MV7442	Fairchild Semiconductor	Green	570	2.1V	20mA	120	3mm T-1	45°	6.30mm	Active	ROHS3
HLMP-Y801-JPP00	Broadcom Limited	Green	568	2.1V	20mA	310	3mm T-1	30°	5.20mm	Active	ROHS3
3SUGC-F	Bivar Inc.	Green	570	2.1V	20mA	300	3mm T-1	20°	5.30mm	Active	ROHS3
3GC-201-S	Bivar Inc.	Green	568	2.1V	20mA	40	3mm T-1	20°	6.58mm	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation: RLI-343P8C3F (Rohm Semiconductor) is the manufacturer-recommended equivalent. This part maintains the same series designation and electrical specifications while offering Active product status, ensuring long-term availability and supply chain stability.

Secondary Recommendations: HLMP-Y801-JPP00 (Broadcom Limited) and 3SUGC-F (Bivar Inc.) are suitable cross-manufacturer substitutes. Both parts meet the electrical compatibility requirements (2.1V forward voltage, green color, through-hole radial mounting) and carry ROHS3 compliance certification. These parts are in Active production status, providing reliable long-term sourcing.

Brightness Consideration: Substitute parts exhibit higher brightness ratings (40–310mcd) compared to the original SLR-343PC3F (6.3mcd). Applications sensitive to brightness levels should evaluate whether increased luminous intensity affects circuit performance or user experience.

Viewing Angle Variation: Substitute parts range from 20° to 45° viewing angle. Applications requiring the original 40° specification should prioritize MV7442 (45°) or verify that alternative angles do not compromise system requirements.

Compliance Status: All recommended substitutes maintain ROHS3 compliance and are suitable for applications with environmental and regulatory requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can I use MV7442 as a direct replacement for SLR-343PC3F?

A: Yes. MV7442 meets the critical electrical compatibility criteria: green color emission (570nm), 2.1V forward voltage, through-hole radial mounting, and ROHS3 compliance. The higher brightness (120mcd vs. 6.3mcd) and wider viewing angle (45° vs. 40°) should be evaluated for your specific application, but these differences do not prevent circuit-level substitution.

Q: Why are the Everlight parts (1224SYGC/S530-E2 and 264-7SYGC/S530-E2) listed but not recommended?

A: These parts emit yellow-green light (573nm) rather than pure green (560nm). They represent a different color family and will produce visually distinct indication. They are listed for reference only and should not be used as substitutes in applications requiring green indication.

Q: What is the difference between RLI-343P8C3F and SLR-343PC3F?

A: RLI-343P8C3F is the manufacturer-recommended equivalent from Rohm Semiconductor. It maintains the same electrical specifications and series designation while offering Active product status, replacing the Last Time Buy SLR-343PC3F.

Q: Does higher brightness in substitute parts affect circuit compatibility?

A: No. Higher brightness does not affect circuit-level compatibility. The forward voltage (2.1V) and test current specifications remain consistent. However, increased brightness may affect visual perception in the application. Verify that higher luminous intensity does not create unintended effects in your specific use case.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification, matching the environmental and regulatory status of the original SLR-343PC3F.

Q: Can I use parts with different viewing angles interchangeably?

A: Viewing angle differences affect light distribution but do not prevent electrical substitution. The original SLR-343PC3F operates at 40°. Substitute parts range from 20° to 45°. Verify that the alternative viewing angle meets your application's visibility and optical requirements before implementation.

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