SLR-342DC3F Equivalent & Substitute Parts

Part Overview

The SLR-342DC3F is an orange LED indicator (605nm) manufactured by Rohm Semiconductor in T-1 through-hole radial package configuration. This part operates at 2V forward voltage with 25mcd brightness rating and 40° viewing angle. The product is classified as Not For New Designs, making identification of functionally equivalent alternatives essential for ongoing maintenance, repair, and legacy system support applications.

Key Parameters

Parameter	SLR-342DC3F Value
Color	Orange
Wavelength - Dominant	605nm
Voltage - Forward (Vf) (Typ)	2V
Current - Test	10mA
Millicandela Rating	25mcd
Mounting Type	Through Hole
Package / Case	Radial
Supplier Device Package	T-1
Lens Style	Round with Domed Top
Lens Size	3.10mm Dia
Viewing Angle	40°
Height (Max)	5.40mm
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SLR-342DC3F is determined by the following critical parameters:

Primary Matching Criteria:

Color: Orange (605nm wavelength range acceptable within 600-620nm)
Mounting Type: Through Hole radial configuration
Package Style: T-1 or equivalent 3mm round lens diameter
Voltage - Forward (Vf): 2V nominal (acceptable range 2.0V to 2.1V)
Lens Configuration: Round with domed top, clear or orange tinted

Secondary Compatibility Factors:

Millicandela Rating: 25mcd baseline (substitutes with higher brightness acceptable for direct replacement)
Current - Test: 10-20mA operational range
Viewing Angle: 40° to 80° acceptable
Height: 4.45mm to 5.40mm maximum
RoHS3 Compliance: Required for environmental and regulatory compatibility

Substitute parts meeting these criteria maintain functional equivalence for indicator applications while accommodating minor variations in brightness, viewing angle, and test current that do not compromise circuit operation.

Parameter Comparison

Parameter	SLR-342DC3F	3294-15USOC/S530-A3	HLMP-Y402-G0000	WP132XNT
Manufacturer	Rohm Semiconductor	Everlight Electronics	Broadcom Limited	Kingbright
Color	Orange	Orange	Orange	Orange
Wavelength - Dominant (nm)	605	615	605	602
Voltage - Forward (Vf) (Typ)	2V	2V	2.1V	2.05V
Current - Test	10mA	20mA	20mA	20mA
Millicandela Rating	25mcd	80mcd	29mcd	20mcd
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial
Supplier Device Package	T-1	3.0mm Round	T-1	T-1
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top
Lens Size	3.10mm Dia	3.00mm Dia	3mm, T-1	3mm, T-1
Viewing Angle	40°	80°	45°	50°
Height (Max)	5.40mm	4.45mm	5.20mm	5.20mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Active	Active	Active

Engineering Selection Recommendations

Direct Substitutes (Orange 605nm Category):

HLMP-Y402-G0000 (Broadcom Limited) represents the closest functional equivalent. This part maintains orange color at 605nm dominant wavelength, operates at 2.1V forward voltage (within acceptable tolerance), and is packaged in T-1 radial configuration. Active product status ensures ongoing availability and supply chain reliability. The 29mcd brightness rating exceeds the original 25mcd specification, providing improved visibility margin without circuit redesign. Height of 5.20mm remains within PCB layout constraints.

WP132XNT (Kingbright) provides an alternative orange substitute at 602nm wavelength with 2.05V forward voltage. The 20mcd brightness rating is slightly lower than the original specification but remains suitable for indicator applications. T-1 package and through-hole mounting ensure mechanical compatibility. Active product status supports long-term availability.

3294-15USOC/S530-A3 (Everlight Electronics) operates at 615nm wavelength (orange spectrum boundary) with 2V forward voltage matching the original specification exactly. The 80mcd brightness rating is significantly higher, requiring circuit current-limiting verification before implementation. Reduced height of 4.45mm may provide PCB layout advantages in space-constrained applications.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), ensuring regulatory and environmental compatibility with the original SLR-342DC3F specification.

Frequently Asked Questions (FAQ)

Q: Can I use a higher brightness LED as a direct substitute?

A: Yes. Substitute LEDs with higher millicandela ratings (such as the 80mcd Everlight part) are functionally compatible for indicator applications. Higher brightness does not compromise circuit operation. Verify that existing current-limiting resistors in the circuit accommodate the substitute part's test current specification (typically 10-20mA range).

Q: What is the acceptable wavelength range for orange LED substitution?

A: Orange LEDs in the 600-620nm dominant wavelength range are visually equivalent for indicator purposes. The SLR-342DC3F operates at 605nm. Substitutes at 602nm, 605nm, and 615nm all fall within acceptable orange color perception and are interchangeable for indication applications.

Q: Are T-1 and 3.0mm round packages mechanically interchangeable?

A: Yes. T-1 package designation and 3.0mm round lens diameter refer to the same physical form factor. Both describe a through-hole radial LED with 3mm lens diameter and domed top configuration. PCB footprints and mounting holes are identical.

Q: What forward voltage tolerance should I apply when selecting a substitute?

A: The SLR-342DC3F operates at 2V nominal. Substitutes rated at 2.0V to 2.1V forward voltage are acceptable. This 0.1V variation is within standard LED manufacturing tolerance and does not require circuit modification. Verify that the circuit's current-limiting resistor accommodates the substitute part's test current specification.

Q: Does product status affect substitution eligibility?

A: Product status indicates supply chain availability and manufacturer support. The original SLR-342DC3F is classified as Not For New Designs, making active-status substitutes (such as HLMP-Y402-G0000, WP132XNT, and 3294-15USOC/S530-A3) preferable for ongoing production and maintenance applications. Active parts ensure long-term sourcing reliability.

Q: Can I substitute an orange LED with a yellow LED?

A: No. Yellow LEDs (587-590nm wavelength) are not functionally equivalent to orange LEDs (605nm). Color perception differences make yellow substitutes unsuitable for applications requiring specific orange indication. Use only orange-colored substitutes from the provided equivalent parts list.

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