SSL-LX30FT4YD Equivalent & Substitute Parts

Part Overview

The SSL-LX30FT4YD is a yellow diffused T-1 through-hole LED manufactured by Lumex Opto/Components Inc. This discrete indicator LED operates at a forward voltage of 2.1V with a test current of 20mA, delivering 9 millicandela of luminous intensity. The component features a 3mm T-1 lens form factor with a 100° viewing angle and a peak wavelength of 585nm. The part is currently active in production and maintains full RoHS3 compliance with unlimited moisture sensitivity rating.

Substitute parts are necessary when original inventory is unavailable, when alternative voltage or current specifications better match circuit requirements, or when different manufacturers' components are required for supply chain flexibility. The following equivalent parts maintain compatibility through shared mechanical form factors, similar optical characteristics, and comparable electrical performance within acceptable parameter ranges.

Key Parameters

Parameter	SSL-LX30FT4YD
Manufacturer	Lumex Opto/Components Inc.
Color	Yellow
Lens Transparency	Diffused
Lens Size	3mm, T-1
Lens Style	Round with Domed Top
Voltage - Forward (Vf) (Typ)	2.1V
Current - Test	20mA
Millicandela Rating	9mcd
Viewing Angle	100°
Peak Wavelength	585nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.70mm
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SSL-LX30FT4YD is determined by the following critical parameters:

Mechanical Compatibility Requirements:

Lens size: 3mm T-1 form factor
Mounting type: Through hole radial configuration
Lens style: Round with domed top
Package case: Radial

Optical Compatibility Requirements:

Color: Yellow
Lens transparency: Diffused
Wavelength range: 585nm to 590nm (peak wavelength)

Electrical Compatibility Requirements:

Forward voltage (Vf): 2.0V to 2.1V nominal
Test current: 10mA to 20mA
Millicandela rating: 2.1mcd minimum

Regulatory & Compliance Requirements:

RoHS3 compliance mandatory
Moisture sensitivity level: 1 (Unlimited)
REACH unaffected status

Parts meeting all four requirement categories are classified as direct substitutes. Parts meeting mechanical and optical requirements but with different electrical specifications are classified as functional alternatives requiring circuit verification.

Parameter Comparison

Parameter	SSL-LX30FT4YD	HLMP-1719-A0002	HLMP-1719	HLMP-1620	HLMP-1621	WP132XYD	SLR-332YY3F
Manufacturer	Lumex Opto/Components Inc.	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Kingbright	Rohm Semiconductor
Color	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3.20mm Dia
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top
Voltage - Forward (Vf) (Typ)	2.1V	1.8V	1.8V	5V	12V	2.1V	2.1V
Current - Test	20mA	2mA	2mA	10mA	13mA	20mA	10mA
Millicandela Rating	9mcd	2.1mcd	2.1mcd	2.2mcd	2.2mcd	15mcd	6.3mcd
Viewing Angle	100°	50°	50°	60°	60°	60°	85°
Peak Wavelength	585nm	—	—	583nm	583nm	590nm	—
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Height (Max)	6.70mm	6.35mm	6.35mm	6.35mm	6.35mm	5.20mm	4.60mm
Product Status	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	—	Cut Tape (CT)	Bulk	Bulk	Bulk	Bulk	Bulk

Engineering Selection Recommendations

Direct Substitutes (Electrical and Mechanical Compatibility):

WP132XYD (Kingbright) and SLR-332YY3F (Rohm Semiconductor) are direct substitutes for the SSL-LX30FT4YD. Both parts share identical forward voltage (2.1V), compatible test current specifications (10mA to 20mA range), yellow diffused lens configuration, 3mm T-1 form factor, and radial through-hole mounting. All three parts maintain active product status and full RoHS3 compliance. WP132XYD delivers 15mcd luminous intensity with a 60° viewing angle, while SLR-332YY3F provides 6.3mcd with an 85° viewing angle. The SSL-LX30FT4YD operates at 9mcd with a 100° viewing angle, positioning it between these alternatives in terms of brightness and beam width.

Functional Alternatives (Mechanical and Optical Compatibility with Electrical Differences):

HLMP-1719-A0002 and HLMP-1719 (Broadcom Limited) are mechanically and optically compatible but operate at reduced forward voltage (1.8V) and test current (2mA). These parts are suitable for applications where lower power consumption is acceptable and circuit design accommodates the lower voltage specification. Both maintain active product status and RoHS3 compliance.

HLMP-1620 (Broadcom Limited) operates at 5V forward voltage with 10mA test current. This part is suitable only for circuits designed for higher voltage operation and is not recommended for direct replacement in 2.1V circuits without circuit modification.

HLMP-1621 (Broadcom Limited) operates at 12V forward voltage with 13mA test current. This part is suitable only for high-voltage applications and requires significant circuit redesign for use as a substitute.

Not Recommended:

SLR-332DU3F (Rohm Semiconductor) is an orange LED (605nm wavelength) with "Not For New Designs" product status. This part does not meet the yellow color specification and is not recommended for new applications.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1719-A0002 be used as a direct replacement for SSL-LX30FT4YD?

A: HLMP-1719-A0002 is mechanically and optically compatible but operates at 1.8V forward voltage versus 2.1V for the SSL-LX30FT4YD. Direct substitution requires circuit verification to confirm that the lower voltage and 2mA test current are acceptable for the application. The part is available in Cut Tape packaging, which may differ from the original packaging specification.

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

A: Both parts are electrically and optically identical. The primary difference is packaging: HLMP-1719 is supplied in Bulk packaging, while HLMP-1719-A0002 is supplied in Cut Tape (CT) format. Selection depends on assembly process requirements and quantity needs.

Q: Why does WP132XYD have higher millicandela rating than SSL-LX30FT4YD?

A: WP132XYD delivers 15mcd compared to 9mcd for SSL-LX30FT4YD, despite identical 2.1V forward voltage and 20mA test current specifications. This difference reflects variations in LED chip efficiency and lens optical design between manufacturers. WP132XYD is suitable for applications requiring higher brightness output.

Q: Can HLMP-1620 or HLMP-1621 be used in place of SSL-LX30FT4YD?

A: HLMP-1620 (5V) and HLMP-1621 (12V) are not suitable for direct substitution in circuits designed for 2.1V operation. These parts require separate power supply circuits or series resistor networks designed for their respective voltage specifications. Use only when circuit design explicitly accommodates higher voltage operation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—HLMP-1719-A0002, HLMP-1719, HLMP-1620, HLMP-1621, WP132XYD, and SLR-332YY3F—maintain full RoHS3 compliance. SLR-332DU3F also carries RoHS3 compliance but is not recommended due to orange color specification and "Not For New Designs" status.

Q: What is the viewing angle difference between SSL-LX30FT4YD and substitute parts?

A: SSL-LX30FT4YD provides a 100° viewing angle. WP132XYD and HLMP-1620/1621 offer 60° viewing angles, while HLMP-1719/1719-A0002 provide 50° viewing angles, and SLR-332YY3F provides 85°. Narrower viewing angles concentrate light intensity in a smaller cone, while wider angles distribute light over a broader area. Selection depends on application visibility requirements.

Q: Is height difference significant between SSL-LX30FT4YD and substitutes?

A: SSL-LX30FT4YD has a maximum height of 6.70mm. Broadcom parts (HLMP series) measure 6.35mm, WP132XYD measures 5.20mm, and SLR-332YY3F measures 4.60mm. Height differences may affect PCB layout and mechanical clearance. Verify clearance requirements before substitution, particularly for applications with space constraints.

Q: Can SLR-332YY3F be used as a substitute?

A: SLR-332YY3F is mechanically and optically compatible with identical 2.1V forward voltage. However, it operates at 10mA test current (versus 20mA for SSL-LX30FT4YD) and delivers 6.3mcd (versus 9mcd). The part maintains active product status and RoHS3 compliance. Substitution is acceptable for applications where the lower brightness and current specifications are compatible with circuit design.

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