SSL-LX3044OD Equivalent & Substitute Parts Reference

Part Overview

The SSL-LX3044OD is an orange diffused LED indicator manufactured by Lumex Opto/Components Inc., designed for through-hole mounting applications. This T-1 (3mm) discrete LED operates at 2V forward voltage with a 30mcd brightness rating and 60° viewing angle. The component is ROHS3 compliant and currently active in production with 841 pieces in stock.

Substitute parts are identified based on matching mechanical form factor, electrical operating parameters, and optical characteristics. Alternative components may be required due to supply constraints, design revisions, or specific application requirements for brightness, voltage, or viewing angle specifications.

Key Parameters

Parameter	Value	Specification Type
Lens Size	3mm, T-1	Mechanical
Lens Transparency	Diffused	Optical
Color	Orange	Optical
Voltage - Forward (Vf)	2V	Electrical
Current - Test	20mA	Electrical
Millicandela Rating	30mcd	Optical
Viewing Angle	60°	Optical
Mounting Type	Through Hole	Mechanical
Wavelength - Peak	630nm	Optical
Package / Case	Radial	Mechanical
RoHS Status	ROHS3 Compliant	Compliance

Substitute Part Grouping Explanation

Substitution logic for the SSL-LX3044OD is based on the following critical parameters:

Primary Matching Criteria:

Lens size: 3mm T-1 form factor
Mounting type: Through-hole radial configuration
Color: Orange optical output
Lens transparency: Diffused finish
Forward voltage: 2V nominal operation
Test current: 20mA nominal
Viewing angle: 60° standard
Wavelength peak: 630nm orange spectrum

Acceptable Variation Ranges:

Millicandela rating: Components with 8.7mcd to 30mcd are functionally equivalent for indication applications
Wavelength peak: 605nm to 630nm acceptable within orange spectrum
Height variation: 5.60mm to 6.55mm compatible with standard through-hole PCB layouts
Forward voltage: 2.0V to 2.2V acceptable for standard 5V logic circuits with appropriate series resistor

Non-Substitutable Parameters:

Lens size must remain 3mm T-1
Mounting type must remain through-hole
Color must remain orange
Lens transparency must remain diffused

Parameter Comparison

Parameter	SSL-LX3044OD	LTL-4291N	SLI-343D8U3F	HLMP-1620	HLMP-1621	HLMP-1719	LTL-4251N	LTL-307YLC	SLI-343D8C3F
Manufacturer	Lumex	Lite-On	Rohm	Broadcom	Broadcom	Broadcom	Lite-On	Lite-On	Rohm
Color	Orange	Orange	Orange	Yellow	Yellow	Yellow	Yellow	Yellow	Orange
Lens Size	3mm T-1	3mm T-1	3.10mm	3mm T-1	3mm T-1	3mm T-1	3mm T-1	5.00mm	3.10mm
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Clear
Vf (Typ)	2V	2V	2.2V	5V	12V	1.8V	2.1V	1.8V	2.2V
Current - Test	20mA	10mA	20mA	10mA	13mA	2mA	10mA	2mA	20mA
Millicandela	30mcd	8.7mcd	470mcd	2.2mcd	2.2mcd	2.1mcd	5.6mcd	3.7mcd	680mcd
Viewing Angle	60°	60°	40°	60°	60°	50°	60°	50°	40°
Wavelength Peak	630nm	630nm	—	583nm	583nm	—	585nm	585nm	—
Height (Max)	4.60mm	6.00mm	5.60mm	6.35mm	6.35mm	6.35mm	5.85mm	8.60mm	5.60mm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Orange Diffused T-1 Substitutes (Highest Compatibility):

The LTL-4291N from Lite-On Inc. is the primary substitute for SSL-LX3044OD. Both components share identical mechanical form factor (3mm T-1), diffused orange lens, 2V forward voltage, 20mA test current, and 60° viewing angle. The LTL-4291N provides 8.7mcd brightness compared to the SSL-LX3044OD's 30mcd, representing a reduction in luminous intensity. This component is ROHS3 compliant and currently active with 15,839 pieces in inventory.

The SLI-343D8U3F from Rohm Semiconductor (EXCELED™ series) provides an alternative orange diffused T-1 option. Operating at 2.2V forward voltage with 20mA test current, this component delivers 470mcd brightness—significantly higher than the SSL-LX3044OD. The 40° viewing angle is narrower than the reference part's 60°. This component is ROHS3 compliant with 1,311 pieces in stock.

Secondary Substitutes (Voltage or Brightness Variations):

The SLI-343D8C3F from Rohm Semiconductor offers orange output in a clear lens configuration rather than diffused. Operating at 2.2V with 20mA test current and 680mcd brightness, this component is suitable only where clear lens transparency is acceptable. The 40° viewing angle differs from the reference specification.

Non-Recommended Substitutes:

Yellow-colored LEDs (HLMP-1620, HLMP-1621, HLMP-1719, LTL-4251N, LTL-307YLC) are not suitable substitutes due to color mismatch. Although mechanically compatible, the optical output wavelength differs significantly from the orange 630nm specification.

Compliance Status:

All recommended substitute parts maintain ROHS3 compliance and active product status, ensuring regulatory alignment with the SSL-LX3044OD.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SSL-LX3044OD with a yellow LED such as HLMP-1620 or LTL-4251N?

A: No. Although these components share the same T-1 form factor and through-hole mounting, the color output is fundamentally different. The SSL-LX3044OD produces orange light at 630nm peak wavelength, while yellow LEDs operate at 583–588nm. Color substitution is not acceptable for indication applications where specific color coding is required.

Q: What is the brightness difference between SSL-LX3044OD and LTL-4291N?

A: The SSL-LX3044OD provides 30mcd brightness, while the LTL-4291N provides 8.7mcd. The LTL-4291N is approximately 71% dimmer. Both operate at 2V forward voltage and 20mA test current. Brightness reduction may be acceptable in applications where indicator visibility is not critical, but circuit design must account for the lower luminous intensity.

Q: Can I use SLI-343D8U3F as a direct replacement for SSL-LX3044OD?

A: The SLI-343D8U3F is mechanically and electrically compatible but differs in brightness and viewing angle. It provides 470mcd (15.7× brighter) at 2.2V forward voltage with a narrower 40° viewing angle compared to the SSL-LX3044OD's 60°. Substitution is acceptable if the application tolerates higher brightness and narrower viewing angle. Circuit resistor values may require adjustment due to the 0.2V voltage difference.

Q: Are there height clearance concerns when substituting the SSL-LX3044OD?

A: The SSL-LX3044OD has a maximum height of 4.60mm. Substitute parts range from 5.60mm to 6.35mm maximum height. If PCB layout includes low-profile components or conformal coating processes, the increased height of substitute parts may create clearance issues. Verify mechanical fit before design implementation.

Q: What is the difference between HLMP-1719 and HLMP-1719-A0002?

A: Both parts are electrically and optically identical yellow LEDs at 1.8V forward voltage with 2.1mcd brightness. The primary difference is packaging: HLMP-1719 is supplied in bulk, while HLMP-1719-A0002 is supplied in cut tape (CT) format. Neither is suitable as a substitute for the SSL-LX3044OD due to color mismatch.

Q: Does the SSL-LX3044OD have any listed substitutes from the manufacturer?

A: According to the provided data, the SSL-LX3044OD lists the following substitutes: LTL-4251, LTL-4291N, WP710A10YD5V, WP3A10YD, and WP132XYD. Of these, LTL-4291N is confirmed as an orange diffused T-1 component with full technical specifications provided in this reference.

Q: Can I substitute based on forward voltage alone?

A: No. Forward voltage is one parameter among many. The SSL-LX3044OD requires matching on lens size (3mm T-1), color (orange), lens transparency (diffused), mounting type (through-hole), and viewing angle (60°). Components with different forward voltages (such as HLMP-1620 at 5V or HLMP-1719 at 1.8V) require different circuit designs and are not direct substitutes.

Q: What compliance certifications apply to substitute parts?

A: All recommended substitute parts are ROHS3 compliant and REACH unaffected, matching the SSL-LX3044OD's regulatory status. All components carry ECCN EAR99 classification and HTSUS code 8541.41.0000. Moisture sensitivity level is 1 (unlimited) for all parts, indicating no special storage or handling requirements.

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