SSL-LX2573HD Red Rectangular LED Equivalent & Substitute Parts

Part Overview

The SSL-LX2573HD is an active, through-hole mounted red LED indicator manufactured by Lumex Opto/Components Inc. This diffused rectangular LED (2mm × 5mm) is designed for discrete 2V radial applications requiring red light indication. With a 3 millicandela rating and 110° viewing angle, it serves general-purpose indication functions in electronic assemblies.

Substitute parts are identified to address inventory availability, lead time constraints, or specific application requirements while maintaining compatibility with the original design envelope and electrical specifications.

Key Parameters

Parameter	Value	Specification Type
Color	Red	Optical
Lens Transparency	Diffused	Optical
Lens Style	Rectangle with Flat Top	Mechanical
Lens Size	5.00mm × 2.00mm	Mechanical
Voltage - Forward (Vf) Typical	2V	Electrical
Current - Test	20mA	Electrical
Viewing Angle	110°	Optical
Mounting Type	Through Hole	Mechanical
Package / Case	Radial	Mechanical
Height (Max)	7.00mm	Mechanical
RoHS Status	ROHS3 Compliant	Compliance
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Environmental

Substitute Part Grouping Explanation

Substitution eligibility for the SSL-LX2573HD is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

Color: Red
Lens Transparency: Diffused
Lens Style: Rectangle with Flat Top
Lens Size: 5.00mm × 2.00mm
Voltage - Forward (Vf) Typical: 2V
Current - Test: 20mA
Viewing Angle: 110°
Mounting Type: Through Hole
Package / Case: Radial
Height (Max): 7.00mm
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

Millicandela Rating: May vary based on application requirements
Wavelength - Peak: May vary within red spectrum range

The SSL-LX2573ID meets all mandatory matching parameters and qualifies as a direct substitute. Variations in brightness (millicandela) and peak wavelength do not preclude substitution when the optical envelope, electrical characteristics, and mechanical form factor remain identical.

Parameter Comparison

Parameter	SSL-LX2573HD (Main)	SSL-LX2573ID (Substitute)	Compatibility
Manufacturer	Lumex Opto/Components Inc.	Lumex Opto/Components Inc.	Identical
Description	LED RED DIFF RECT 2MMX5MM T/H	LED RED DIFF RECT 2MMX5MM T/H	Identical
Color	Red	Red	Identical
Lens Transparency	Diffused	Diffused	Identical
Lens Style	Rectangle with Flat Top	Rectangle with Flat Top	Identical
Lens Size	5.00mm × 2.00mm	5.00mm × 2.00mm	Identical
Millicandela Rating	3mcd	10mcd	Variation Allowed
Voltage - Forward (Vf) Typical	2V	2V	Identical
Current - Test	20mA	20mA	Identical
Viewing Angle	110°	110°	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	Radial	Radial	Identical
Height (Max)	7.00mm	7.00mm	Identical
Wavelength - Peak	700nm	635nm	Variation Allowed
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

SSL-LX2573HD Selection Criteria:

Primary choice when 3 millicandela brightness specification is required
Specified wavelength of 700nm (deep red) is required for the application
Original design validation and qualification documentation references this part number

SSL-LX2573ID Selection Criteria:

Higher brightness requirement (10 millicandela) within the same form factor
Wavelength of 635nm (standard red) is acceptable for the application
Inventory availability or lead time advantages
Both parts maintain identical electrical, mechanical, and compliance characteristics
Both parts are Active status with ROHS3 compliance and MSL 1 rating

Selection between these parts depends solely on brightness and wavelength requirements. All other parameters remain constant, ensuring direct interchangeability within the specified design envelope.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX2573ID replace SSL-LX2573HD in any application?

A: Direct replacement is possible when the application tolerates the brightness difference (10mcd versus 3mcd) and wavelength shift (635nm versus 700nm). Both parts share identical electrical specifications (2V forward voltage, 20mA test current), mechanical dimensions (5.00mm × 2.00mm lens, 7.00mm max height), and mounting type (through-hole radial). Verify that increased brightness does not cause optical interference or that the wavelength shift does not affect color perception requirements.

Q: What are the key differences between these two parts?

A: The SSL-LX2573ID provides higher luminous intensity (10mcd versus 3mcd) and operates at a shorter peak wavelength (635nm versus 700nm). All other specifications—forward voltage, test current, viewing angle, lens style, package type, and compliance ratings—are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both SSL-LX2573HD and SSL-LX2573ID are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited). Both are REACH Unaffected and classified as EAR99 for export control purposes.

Q: What is the viewing angle for these LEDs?

A: Both parts have a 110° viewing angle, providing wide-angle light distribution suitable for general indication applications.

Q: Can these parts be used in surface-mount applications?

A: No. Both SSL-LX2573HD and SSL-LX2573ID are through-hole mounted components with radial package configuration. They are not suitable for surface-mount assembly.

Q: What is the maximum operating height for PCB clearance?

A: The maximum height is 7.00mm for both parts, measured from the PCB surface to the top of the lens.

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