SSL-LX306F4LID Red LED T-1 Equivalent & Substitute Parts

Part Overview

The SSL-LX306F4LID is an active red LED indication component manufactured by Lumex Opto/Components Inc. This through-hole mounted T-1 form factor LED operates at 2V forward voltage with a 40mcd brightness rating and 635nm peak wavelength. The component features a diffused red lens with 60° viewing angle and is RoHS3 compliant. Substitute parts are identified for applications requiring equivalent optical and electrical performance or where primary inventory availability is limited.

Key Parameters

Parameter	Value
Manufacturer Part Number	SSL-LX306F4LID
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)	2V
Current - Test	20mA
Millicandela Rating	40mcd
Viewing Angle	60°
Wavelength - Peak	635nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.00mm
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SSL-LX306F4LID are classified into two categories based on electrical and optical parameter alignment:

Direct Substitutes (Lumex SSL-LX3054 Series): SSL-LX3054LID and SSL-LX3054ID maintain identical electrical specifications (2V forward voltage, 20mA test current, 40mcd brightness, 635nm peak wavelength) and optical characteristics (diffused red lens, 60° viewing angle, T-1 form factor). These parts differ only in packaging configuration and maximum height specification (5.25mm versus 6.00mm). Both are manufactured by Lumex Opto/Components Inc. and carry active product status with RoHS3 compliance.

Parametric Equivalents (Cross-Manufacturer): HLMP-K101 (Broadcom Limited) and HLMPK101 (onsemi) provide functional equivalence with minor electrical and optical variations. These parts operate at 1.8V forward voltage (0.2V lower than the primary part), deliver 45mcd brightness (5mcd higher), and feature peak wavelengths of 645nm and 660nm respectively. Both maintain the T-1 form factor, diffused red lens, 60° viewing angle, and 20mA test current. The HLMP-K101 carries active product status, while HLMPK101 is classified as obsolete.

Substitution eligibility is determined by matching the following critical parameters: lens color (red), lens transparency (diffused), lens size (3mm T-1), mounting type (through hole), viewing angle (60°), and test current (20mA).

Parameter Comparison

Parameter	SSL-LX306F4LID	SSL-LX3054LID	SSL-LX3054ID	HLMP-K101	HLMPK101
Manufacturer	Lumex	Lumex	Lumex	Broadcom	onsemi
Color	Red	Red	Red	Red	Red
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Voltage - Forward (Vf) (Typ)	2V	2V	2V	1.8V	1.8V
Current - Test	20mA	20mA	20mA	20mA	20mA
Millicandela Rating	40mcd	40mcd	40mcd	45mcd	45mcd
Viewing Angle	60°	60°	60°	60°	60°
Wavelength - Peak	635nm	635nm	635nm	645nm	660nm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial
Height (Max)	6.00mm	5.25mm	5.25mm	6.35mm	6.30mm
Product Status	Active	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified

Engineering Selection Recommendations

Primary Substitutes: SSL-LX3054LID and SSL-LX3054ID are direct electrical and optical equivalents to the SSL-LX306F4LID. Both parts maintain identical forward voltage (2V), test current (20mA), brightness (40mcd), and peak wavelength (635nm) specifications. Selection between these Lumex parts should be based on packaging requirements and available inventory. SSL-LX3054LID and SSL-LX3054ID are both active products with RoHS3 compliance and unlimited moisture sensitivity rating.

Cross-Manufacturer Alternatives: HLMP-K101 (Broadcom Limited) provides parametric equivalence with active product status and full RoHS3 compliance. This part operates at 1.8V forward voltage, delivering 5mcd additional brightness (45mcd) with a 645nm peak wavelength. The 0.2V voltage reduction and wavelength shift to 645nm must be evaluated against circuit design requirements and color matching specifications.

Obsolete Part Consideration: HLMPK101 (onsemi) carries obsolete product status and should not be selected for new designs or long-term production applications. This part is retained in the equivalency table for reference only in legacy system maintenance scenarios.

Compliance Verification: All active substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the primary part's regulatory status. HLMPK101 compliance status is not specified and should be verified independently if required for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX3054LID and SSL-LX3054ID be used interchangeably with SSL-LX306F4LID?

A: Yes. Both SSL-LX3054LID and SSL-LX3054ID maintain identical electrical specifications (2V forward voltage, 20mA test current) and optical characteristics (40mcd brightness, 635nm peak wavelength, diffused red lens, 60° viewing angle, T-1 form factor). The primary difference is maximum height: SSL-LX3054 series parts measure 5.25mm maximum height compared to 6.00mm for the SSL-LX306F4LID. Verify PCB layout clearance before substitution.

Q: What are the electrical differences between the SSL-LX306F4LID and HLMP-K101?

A: HLMP-K101 operates at 1.8V forward voltage compared to 2V for the SSL-LX306F4LID. This 0.2V reduction affects circuit current limiting calculations. HLMP-K101 delivers 45mcd brightness versus 40mcd for the primary part. Peak wavelength differs: HLMP-K101 is 645nm compared to 635nm. These differences require circuit re-evaluation and color matching verification before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: SSL-LX3054LID, SSL-LX3054ID, and HLMP-K101 are confirmed RoHS3 compliant. HLMPK101 (onsemi) compliance status is not specified in available documentation. For regulated applications requiring RoHS3 certification, use only SSL-LX3054 series parts or HLMP-K101.

Q: Why is HLMPK101 listed as a substitute if it is obsolete?

A: HLMPK101 is included for reference in legacy system maintenance and repair applications where existing inventory may be available. This part should not be selected for new designs or production applications. Active alternatives (SSL-LX3054 series or HLMP-K101) are recommended for all new implementations.

Q: What is the impact of wavelength differences on color perception?

A: The SSL-LX306F4LID operates at 635nm peak wavelength. HLMP-K101 operates at 645nm, and HLMPK101 at 660nm. These wavelength variations produce perceptible color shifts across the red spectrum. Applications requiring precise color matching (indicator panels, status displays) must verify wavelength compatibility before substitution.

Q: Can I substitute HLMP-K101 in a circuit designed for SSL-LX306F4LID without modification?

A: Circuit modification is required. HLMP-K101 operates at 1.8V forward voltage compared to 2V for the SSL-LX306F4LID. Current limiting resistor values must be recalculated to maintain proper LED current (20mA test current). Failure to adjust circuit parameters will result in excessive LED current and reduced component life.

Q: What packaging differences exist between substitute parts?

A: SSL-LX306F4LID uses standard packaging. SSL-LX3054LID and SSL-LX3054ID are supplied in bulk packaging. HLMP-K101 is supplied in bulk packaging. HLMPK101 packaging is not specified. Verify packaging compatibility with assembly equipment and handling procedures before procurement.

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