SSL-LX3044SRD Equivalent & Substitute Parts

Part Overview

The SSL-LX3044SRD is a red diffused LED indicator in T-1 through-hole package manufactured by Lumex Opto/Components Inc. This component is rated at 1.7V forward voltage with 80mcd brightness and a 60° viewing angle. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and inventory management. Active alternatives with comparable electrical and mechanical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value
Manufacturer Part Number	SSL-LX3044SRD
Manufacturer	Lumex Opto/Components Inc.
Description	LED RED DIFFUSED T-1 T/H
Color	Red
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	1.7V
Current - Test	20mA
Millicandela Rating	80mcd
Viewing Angle	60°
Wavelength - Peak	660nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	4.60mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SSL-LX3044SRD is determined by alignment across the following critical parameters:

Primary Substitution Criteria:

Color: Red
Lens Transparency: Diffused
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
Voltage - Forward (Vf) (Typ): 1.7V to 2.1V range
Current - Test: 20mA nominal
Viewing Angle: 60° preferred
Wavelength - Peak: 625nm to 660nm range

Grouping Logic:

MFR Recommended Substitute: SSL-LX3044SID shares the same base product number (SSL-LX3044) and is manufactured by the same supplier. This part maintains identical mechanical dimensions, lens specifications, and mounting characteristics while offering improved brightness (100mcd vs 80mcd) and active product status.

Parametric Equivalent: SSL-LX305F4SRD provides electrical and optical equivalence with identical forward voltage (1.7V), brightness (80mcd), and wavelength (660nm). This part is active and maintains the same lens and mounting specifications with a marginal height increase (5.00mm vs 4.60mm).

Similar Alternatives: Parts from Everlight Electronics, Bivar Inc., Visual Communications Company, and Broadcom Limited provide red diffused T-1 through-hole LEDs with comparable form factors. These alternatives vary in forward voltage (1.8V to 5V), brightness (1.8mcd to 400mcd), and viewing angles (30° to 60°), requiring circuit-level evaluation for compatibility.

Parameter Comparison

Parameter	SSL-LX3044SRD (Main)	SSL-LX3044SID (MFR Recommended)	SSL-LX305F4SRD (Parametric Equivalent)	1254-10SURD/S530-A3 (Similar)	3HD-F (Similar)	4300F1LC (Similar)	HLMP-1301-G00FG (Similar)	HLMP-1600 (Similar)	HLMP-1601 (Similar)
Manufacturer	Lumex	Lumex	Lumex	Everlight	Bivar	VCC	Broadcom	Broadcom	Broadcom
Color	Red	Red	Red	Red	Red	Red	Red	Red	Red
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	3mm, T-1	3mm, T-1	3mm, T-1	3.00mm Dia	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Voltage - Forward (Vf) (Typ)	1.7V	2.1V	1.7V	2V	2V	1.8V	1.9V	5V	12V
Current - Test	20mA	20mA	20mA	20mA	20mA	2mA	10mA	10mA	13mA
Millicandela Rating	80mcd	100mcd	80mcd	400mcd	30mcd	1.8mcd	8.6mcd	2.1mcd	2.1mcd
Viewing Angle	60°	60°	60°	30°	35°	50°	60°	60°	60°
Wavelength - Peak	660nm	636nm	660nm	632nm	625nm	635nm	635nm	635nm	635nm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Height (Max)	4.60mm	4.60mm	5.00mm	5.30mm	5.30mm	6.35mm	6.35mm	6.35mm	6.35mm
Product Status	Obsolete	Active	Active	Active	Active	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SSL-LX3044SID

The SSL-LX3044SID is the manufacturer-recommended substitute. Both parts share the same base product number (SSL-LX3044) and are manufactured by Lumex Opto/Components Inc. The SSL-LX3044SID maintains identical mechanical dimensions (4.60mm height), lens specifications (3mm T-1 diffused), and mounting configuration (radial through-hole). The forward voltage increases from 1.7V to 2.1V, and brightness improves from 80mcd to 100mcd. The part is active and ROHS3 compliant. Circuit designs operating at 20mA test current accommodate this voltage differential without modification.

Secondary Recommendation: SSL-LX305F4SRD

The SSL-LX305F4SRD provides parametric equivalence with identical electrical characteristics (1.7V forward voltage, 80mcd brightness, 660nm peak wavelength) and optical properties (60° viewing angle, diffused lens). This part is active and ROHS3 compliant. The height increases to 5.00mm, which requires verification against PCB layout constraints. The different base product number (SSL-LX305 vs SSL-LX3044) indicates a distinct product line within the Lumex portfolio.

Alternative Consideration: 3HD-F

The 3HD-F from Bivar Inc. is active and ROHS3 compliant. It maintains the 3mm T-1 form factor and radial through-hole mounting. The forward voltage is 2V with 30mcd brightness and 35° viewing angle. This part is suitable for applications where reduced brightness and narrower viewing angle are acceptable. Height is 5.30mm.

Not Recommended for New Designs: 4300F1LC

The 4300F1LC from Visual Communications Company carries a "Not For New Designs" status. Although ROHS3 compliant, this classification indicates the manufacturer does not support new design implementations.

Voltage-Dependent Alternatives:

The HLMP-1600 (5V) and HLMP-1601 (12V) from Broadcom Limited are suitable only for circuits designed for higher supply voltages. These parts are active and ROHS3 compliant but require different circuit topologies than the 1.7V SSL-LX3044SRD.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX3044SID directly replace SSL-LX3044SRD without circuit modification?

A: The SSL-LX3044SID operates at 2.1V forward voltage compared to 1.7V for the SSL-LX3044SRD. At the 20mA test current, this 0.4V difference affects series resistor calculations in current-limiting circuits. Designs using fixed current sources or regulated supplies accommodate this change. Designs using fixed resistors require resistor value adjustment to maintain target current.

Q: What is the significance of the wavelength difference between 660nm and 636nm?

A: The SSL-LX3044SRD operates at 660nm (deep red), while SSL-LX3044SID operates at 636nm (standard red). Both are within the red spectrum and appear red to human perception. The wavelength difference reflects different LED chip technology. Applications requiring specific wavelength characteristics must maintain the original part or select alternatives with matching wavelength specifications.

Q: Are the mechanical dimensions interchangeable between all listed substitutes?

A: No. The SSL-LX3044SRD has a maximum height of 4.60mm. The SSL-LX305F4SRD increases to 5.00mm, while Bivar 3HD-F, VCC 4300F1LC, and Broadcom HLMP series reach 5.30mm to 6.35mm. PCB layout and component clearance requirements determine whether height variations are acceptable. Verify mounting hole spacing and adjacent component placement before substitution.

Q: What does "Diffused" lens transparency mean for optical performance?

A: A diffused lens scatters light across a wider area, reducing peak brightness in the direct viewing direction but improving visibility from off-axis angles. All listed substitutes maintain diffused lens characteristics, preserving the optical behavior of the original SSL-LX3044SRD.

Q: Why is product status important for component selection?

A: The SSL-LX3044SRD is classified as obsolete, meaning the manufacturer no longer produces it. Active alternatives ensure long-term supply availability and continued manufacturing support. Parts marked "Not For New Designs" indicate the manufacturer discourages new implementations, though existing inventory may remain available.

Q: How does the 60° viewing angle compare to alternatives with different angles?

A: The SSL-LX3044SRD provides a 60° viewing angle, matching SSL-LX3044SID, SSL-LX305F4SRD, HLMP-1301-G00FG, HLMP-1600, and HLMP-1601. The Everlight 1254-10SURD/S530-A3 narrows to 30°, and Bivar 3HD-F provides 35°. Narrower angles concentrate brightness in the forward direction; wider angles distribute brightness across a broader area. Application requirements for visibility range determine acceptable viewing angle specifications.

Q: Are all listed parts ROHS3 compliant?

A: The SSL-LX3044SRD, SSL-LX3044SID, SSL-LX305F4SRD, 3HD-F, 4300F1LC, HLMP-1301-G00FG, HLMP-1600, and HLMP-1601 are all ROHS3 compliant. The Everlight 1254-10SURD/S530-A3 does not specify RoHS status in the provided data. Compliance verification is required for applications subject to RoHS regulations.

Q: What packaging options are available?

A: The SSL-LX3044SRD is supplied in bulk packaging. The SSL-LX3044SID is available in bulk packaging. The Everlight 1254-10SURD/S530-A3 is supplied in Tape & Reel (TR) format, suitable for automated assembly. Other alternatives are supplied in bulk. Packaging selection affects procurement, handling, and assembly processes.

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