SSL-LX3054YT Equivalent & Substitute Parts

Part Overview

The SSL-LX3054YT is a yellow LED indication component manufactured by Lumex Opto/Components Inc., designed for through-hole mounting applications. This T-1 (3mm) discrete LED operates at a forward voltage of 2.1V with a test current of 20mA and delivers 90 millicandela of luminous intensity. The component features a clear lens with a domed top and a 30° viewing angle, with peak wavelength output at 585nm. The SSL-LX3054YT maintains Active product status and holds ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the primary component experiences inventory constraints, extended lead times, or when design flexibility permits selection from alternative manufacturers offering compatible electrical and mechanical characteristics within the same T-1 form factor.

Key Parameters

Parameter	Value
Manufacturer Part Number	SSL-LX3054YT
Manufacturer	Lumex Opto/Components Inc.
Color	Yellow
Lens Transparency	Clear
Millicandela Rating	90mcd
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.1V
Current - Test	20mA
Viewing Angle	30°
Mounting Type	Through Hole
Wavelength - Peak	585nm
Package / Case	Radial
Height (Max)	5.25mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the SSL-LX3054YT is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

Color: Yellow
Lens Transparency: Clear
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
Voltage - Forward (Vf) (Typ): 2.1V
Current - Test: 20mA
Wavelength - Peak: 585nm (±5nm tolerance acceptable)

Secondary Compatibility Factors:

Millicandela Rating: 90mcd (direct equivalents) or lower ratings for reduced brightness applications
Viewing Angle: 30° (direct equivalents) or wider angles for increased visibility
Height (Max): 5.25mm (direct equivalents) or comparable dimensions for PCB layout compatibility
RoHS Status: ROHS3 Compliant
Product Status: Active

Parts are grouped into two categories:

Direct Equivalents: Parts matching all primary substitution criteria with identical or near-identical secondary parameters. These parts are fully interchangeable without circuit modification.

Similar Substitutes: Parts matching primary substitution criteria but with variations in millicandela rating, viewing angle, or height. These parts require circuit evaluation to confirm suitability for the intended application, particularly regarding brightness requirements and spatial constraints.

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	Current - Test	Millicandela	Viewing Angle	Wavelength - Peak	Height (Max)	Product Status	RoHS Status
SSL-LX3054YT	Lumex Opto/Components Inc.	Yellow	2.1V	20mA	90mcd	30°	585nm	5.25mm	Active	ROHS3 Compliant
SSL-LX3044YT	Lumex Opto/Components Inc.	Yellow	2.1V	20mA	90mcd	30°	585nm	4.60mm	Active	ROHS3 Compliant
WP710A10YT	Kingbright	Yellow	2.1V	20mA	30mcd	34°	590nm	5.90mm	Active	ROHS3 Compliant
LTL-4252	Lite-On Inc.	Yellow	2.1V	10mA	19mcd	20°	585nm	6.55mm	Active	ROHS3 Compliant
LTL-4252N	Lite-On Inc.	Yellow	2.1V	10mA	19mcd	45°	585nm	5.85mm	Active	ROHS3 Compliant
SLR-332YC3F	Rohm Semiconductor	Yellow	2.1V	10mA	10mcd	85°	587nm	4.60mm	Active	ROHS3 Compliant
HLMP-1420	Broadcom Limited	Yellow	2V	10mA	15mcd	45°	583nm	6.35mm	Active	ROHS3 Compliant
HLMP-1421	Broadcom Limited	Yellow	2V	10mA	15mcd	45°	583nm	6.35mm	Active	ROHS3 Compliant
HLMP-Y402-G0000	Broadcom Limited	Orange	2.1V	20mA	29mcd	45°	610nm	5.20mm	Active	ROHS3 Compliant
WP710A10NT	Kingbright	Orange	2.05V	20mA	30mcd	34°	607nm	5.90mm	Active	ROHS3 Compliant
WP132XNT	Kingbright	Orange	2.05V	20mA	20mcd	50°	607nm	5.20mm	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Selection:

SSL-LX3044YT (Lumex Opto/Components Inc.) is the primary direct equivalent to SSL-LX3054YT. Both components share identical electrical specifications (2.1V forward voltage, 20mA test current, 90mcd brightness, 585nm peak wavelength) and mechanical form factor (T-1, 3mm, radial through-hole). The SSL-LX3044YT exhibits a reduced maximum height of 4.60mm compared to 5.25mm on the SSL-LX3054YT, making it suitable for applications with tighter vertical clearance constraints. Both components maintain Active product status and ROHS3 compliance. This substitution requires no circuit modification.

Compatible Substitute Selection for Reduced Brightness Applications:

WP710A10YT (Kingbright) operates at identical forward voltage (2.1V) and test current (20mA) with yellow color and clear lens. The component delivers 30mcd brightness (one-third of the SSL-LX3054YT) and features a 34° viewing angle with 590nm peak wavelength. The maximum height of 5.90mm exceeds the primary component by 0.65mm. This substitute is suitable for applications where reduced brightness is acceptable and where the increased height does not conflict with PCB layout requirements.

Compatible Substitute Selection for Reduced Current Applications:

LTL-4252N (Lite-On Inc.) operates at 2.1V forward voltage with yellow color and clear lens. The component operates at 10mA test current (half the primary component) and delivers 19mcd brightness with a 45° viewing angle. Peak wavelength is 585nm, matching the primary component. Maximum height is 5.85mm. This substitute is suitable for low-power applications where reduced current consumption is required and where the increased viewing angle provides design flexibility.

Wavelength-Compatible Alternatives:

SLR-332YC3F (Rohm Semiconductor) operates at 2.1V forward voltage with yellow color and clear lens. The component operates at 10mA test current and delivers 10mcd brightness with an 85° wide viewing angle. Peak wavelength is 587nm, within acceptable tolerance of the primary component. Maximum height is 4.60mm. This substitute is suitable for applications requiring wide-angle visibility with reduced brightness and current consumption.

Broadcom Limited Alternatives:

HLMP-1420 and HLMP-1421 (Broadcom Limited) operate at 2V forward voltage (0.1V below primary component) with yellow color and clear lens. Both components operate at 10mA test current and deliver 15mcd brightness with 45° viewing angle. Peak wavelength is 583nm, within acceptable tolerance. Maximum height is 6.35mm. These substitutes are suitable for applications where the reduced forward voltage and current consumption are compatible with circuit design.

Color Variant Consideration:

HLMP-Y402-G0000 (Broadcom Limited) is an orange LED variant operating at 2.1V forward voltage and 20mA test current, matching the primary component's electrical specifications. The component delivers 29mcd brightness with 45° viewing angle and 610nm peak wavelength. This substitute is applicable only to applications where orange color indication is functionally equivalent to yellow.

All recommended substitutes maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the primary component.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX3044YT be used as a direct replacement for SSL-LX3054YT without circuit modification?

A: Yes. SSL-LX3044YT is a direct electrical equivalent with identical forward voltage (2.1V), test current (20mA), brightness (90mcd), and wavelength (585nm). The only difference is reduced maximum height (4.60mm vs. 5.25mm), which provides additional PCB layout flexibility. No circuit modification is required.

Q: What is the primary difference between SSL-LX3054YT and WP710A10YT?

A: WP710A10YT operates at identical forward voltage (2.1V) and test current (20mA) but delivers significantly reduced brightness (30mcd vs. 90mcd). The viewing angle is slightly wider (34° vs. 30°), and peak wavelength is 590nm versus 585nm. WP710A10YT is suitable only for applications where reduced brightness is acceptable.

Q: Are the Broadcom HLMP-1420 and HLMP-1421 suitable replacements?

A: HLMP-1420 and HLMP-1421 are compatible substitutes with important limitations. Both operate at 2V forward voltage (0.1V lower than SSL-LX3054YT) and 10mA test current (half the primary component). Brightness is significantly reduced to 15mcd. These components are suitable only for low-power applications where the reduced forward voltage and current are compatible with circuit design.

Q: What is the significance of the 30° viewing angle on SSL-LX3054YT?

A: The 30° viewing angle defines the cone of visibility for the LED indication. Narrower angles concentrate light intensity in a specific direction, while wider angles distribute light across a broader area. Substitutes with wider viewing angles (such as LTL-4252N at 45° or SLR-332YC3F at 85°) provide increased visibility from off-axis positions but may appear dimmer when viewed directly due to brightness distribution across a larger area.

Q: Can orange LED variants substitute for the yellow SSL-LX3054YT?

A: Orange variants such as HLMP-Y402-G0000, WP710A10NT, and WP132XNT are electrically compatible but differ in color and wavelength. These substitutes are applicable only to applications where orange color indication is functionally equivalent to yellow. Color-critical applications require yellow variants.

Q: What does T-1 (3mm) form factor mean?

A: T-1 refers to the traditional through-hole LED package with a 3mm diameter cylindrical lens. All listed substitutes maintain this form factor, ensuring mechanical compatibility with standard LED mounting holes and sockets. The radial package configuration indicates two leads extending from the base for through-hole PCB insertion.

Q: How does millicandela rating affect component selection?

A: Millicandela (mcd) measures luminous intensity. The SSL-LX3054YT delivers 90mcd, providing high brightness for clear indication in well-lit environments. Substitutes with lower ratings (such as 10mcd to 30mcd) are suitable for applications where reduced brightness is acceptable or where power consumption must be minimized. Higher brightness applications require components rated at or above 90mcd.

Q: What is the importance of RoHS3 compliance?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances regulations, restricting lead, mercury, cadmium, and other hazardous materials. All listed substitutes maintain ROHS3 compliance, ensuring regulatory alignment for applications subject to environmental and safety standards.

Q: Can LTL-4252 and LTL-4252N be used interchangeably?

A: LTL-4252 and LTL-4252N are functionally similar but differ in viewing angle (20° vs. 45°) and maximum height (6.55mm vs. 5.85mm). LTL-4252N provides wider visibility and reduced height, making it more suitable for general-purpose applications. LTL-4252 is suitable for applications requiring narrow-angle, focused indication. Both operate at identical forward voltage (2.1V) and reduced test current (10mA).

Q: What is the impact of forward voltage variation on circuit design?

A: SSL-LX3054YT operates at 2.1V forward voltage. Substitutes operating at 2.0V (such as HLMP-1420 and HLMP-1421) or 2.05V (such as WP710A10NT and WP132XNT) require circuit evaluation to confirm compatibility with current-limiting resistor calculations. A 0.1V reduction in forward voltage increases current flow through the LED if the series resistor value remains unchanged. Circuit designers must recalculate resistor values to maintain appropriate test current levels.

Q: Are there inventory considerations for substitute selection?

A: Inventory levels vary significantly among substitutes. SSL-LX3054YT has 973 units in stock, while SSL-LX3044YT has 2,230 units. WP710A10YT has only 1,286 units, while HLMP-Y402-G0000 has 55,742 units. Substitute selection may be influenced by availability and lead time requirements for production schedules.

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