SSL-LX3044YC LED Yellow Clear T-1 Through Hole Equivalent & Substitute Parts

Part Overview

The SSL-LX3044YC is a yellow LED indication component manufactured by Lumex Opto/Components Inc., designed for through-hole mounting applications. This discrete 3mm T-1 radial LED operates at 2.1V forward voltage with a 90mcd brightness rating and 30° viewing angle. The component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified based on matching electrical characteristics (forward voltage, test current, lens size, and mounting type) and mechanical compatibility (T-1 through-hole radial package). Alternative components may be required due to inventory availability, design optimization, or supply chain considerations.

Key Parameters

Parameter	SSL-LX3044YC Value	Specification Basis
Manufacturer	Lumex Opto/Components Inc.	Primary source
Color	Yellow	Optical characteristic
Lens Transparency	Clear	Optical characteristic
Lens Size	3mm, T-1	Mechanical compatibility
Voltage - Forward (Vf) Typical	2.1V	Electrical requirement
Current - Test	20mA	Operating condition
Millicandela Rating	90mcd	Brightness specification
Viewing Angle	30°	Optical characteristic
Mounting Type	Through Hole	Package type
Package / Case	Radial	Physical configuration
Height (Max)	4.60mm	Mechanical dimension
Wavelength - Peak	585nm	Optical specification
RoHS Status	ROHS3 Compliant	Regulatory compliance
Product Status	Active	Lifecycle status

Substitute Part Grouping Explanation

Substitute parts are grouped into two categories based on substitution compatibility with SSL-LX3044YC:

Category A: Direct Yellow LED Substitutes (Same Color, Clear Lens)

These parts maintain the yellow color and clear lens transparency of the main part. Substitution is based on matching the following critical parameters:

Color: Yellow
Lens Transparency: Clear
Lens Size: 3mm T-1 form factor
Mounting Type: Through Hole Radial
Voltage - Forward (Vf): 2.0V to 2.1V range
Current - Test: 20mA
Package / Case: Radial

Parts in this category: WP710A10YC, LTL1CHKSKNN

Category B: Alternative Yellow LED Substitutes (Yellow Color, Diffused Lens)

These parts provide yellow indication with diffused lens technology. Substitution is based on:

Color: Yellow
Lens Size: 3mm form factor
Mounting Type: Through Hole Radial
Voltage - Forward (Vf): 2.0V to 2.1V range
Current - Test: 20mA
Package / Case: Radial

Parts in this category: 151031YS06000, SLR-343YC3F

Category C: Non-Substitutable Parts (Different Color)

The following parts are listed in the substitute field but are not direct substitutes due to color mismatch (orange instead of yellow):

HLMP-Y901-J0000 (Orange, Broadcom Limited)
LTL1CHKFKNN (Orange, Lite-On Inc.)
WP710A10NC (Orange, Kingbright)
SLR-342DC3F (Orange, Rohm Semiconductor)

These orange LED components share mechanical compatibility and similar electrical characteristics but differ in optical output color and are suitable only for applications where orange indication is acceptable.

Parameter Comparison

Parameter	SSL-LX3044YC	WP710A10YC	LTL1CHKSKNN	151031YS06000	SLR-343YC3F
Manufacturer	Lumex Opto/Components Inc.	Kingbright	Lite-On Inc.	Würth Elektronik	Rohm Semiconductor
Color	Yellow	Yellow	Yellow	Yellow	Yellow
Lens Color	Colorless	Colorless	Colorless	Yellow	Yellow
Lens Transparency	Clear	Clear	Clear	Diffused	Clear
Lens Size	3mm, T-1	3mm, T-1	3.10mm Dia	3.00mm Dia	3.10mm Dia
Voltage - Forward (Vf) Typical	2.1V	2.1V	2.05V	2V	2.1V
Current - Test	20mA	20mA	20mA	20mA	10mA
Millicandela Rating	90mcd	30mcd	320mcd	110mcd	16mcd
Viewing Angle	30°	34°	45°	60°	40°
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial
Height (Max)	4.60mm	5.90mm	5.20mm	5.55mm	5.60mm
Wavelength - Peak	585nm	590nm	591nm	592nm	585nm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Not For New Designs
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Active Product Status)

WP710A10YC (Kingbright) and LTL1CHKSKNN (Lite-On Inc.) are the preferred substitutes for new designs. Both components maintain Active product status, ensuring long-term availability and supply chain stability. WP710A10YC provides the closest electrical match with identical 2.1V forward voltage and 20mA test current. LTL1CHKSKNN offers higher brightness (320mcd versus 90mcd) with slightly lower forward voltage (2.05V), suitable for applications requiring increased visibility.

Secondary Substitutes (Active Product Status)

151031YS06000 (Würth Elektronik) is an Active product with diffused lens technology, providing 110mcd brightness and 60° viewing angle. This component is suitable for applications where wider viewing angle and diffused light distribution are beneficial. The 2V forward voltage and 20mA test current maintain electrical compatibility.

Legacy Substitutes (Not For New Designs)

SLR-343YC3F (Rohm Semiconductor) carries "Not For New Designs" status and should be used only for replacement or maintenance of existing assemblies. This component operates at 10mA test current (versus 20mA standard) and provides lower brightness (16mcd), limiting its application scope.

Regulatory Compliance

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the regulatory profile of SSL-LX3044YC. All components are classified as EAR99 export control and carry identical HTSUS tariff code 8541.41.0000.

Frequently Asked Questions (FAQ)

Q1: Can WP710A10YC directly replace SSL-LX3044YC in existing designs?

WP710A10YC shares identical electrical specifications (2.1V forward voltage, 20mA test current) and mechanical package (3mm T-1 radial through-hole). The primary difference is height: WP710A10YC measures 5.90mm maximum height versus 4.60mm for SSL-LX3044YC. Verify PCB clearance and mechanical constraints before substitution.

Q2: What is the difference between clear and diffused yellow lenses?

Clear lens (colorless) provides direct light transmission with narrow viewing angle (30-34°), suitable for focused indication. Diffused lens (yellow-tinted) scatters light across wider viewing angles (60°), providing visibility from multiple directions. 151031YS06000 with diffused lens is appropriate for applications requiring omnidirectional visibility.

Q3: Why are orange LED parts listed as substitutes if they are different colors?

Orange LED components (HLMP-Y901-J0000, LTL1CHKFKNN, WP710A10NC, SLR-342DC3F) share identical mechanical packaging and similar electrical characteristics. These are listed as cross-reference options only for applications where color change from yellow to orange is acceptable. Direct substitution is not recommended for color-critical applications.

Q4: What does "Not For New Designs" status mean for SLR-343YC3F?

"Not For New Designs" indicates the component is in end-of-life phase. Rohm Semiconductor continues to supply existing inventory but does not recommend this part for new product development. Use only for replacement of existing assemblies or when no alternative is available.

Q5: How do brightness ratings (mcd) affect substitution?

Millicandela rating determines LED brightness at specified test current. SSL-LX3044YC provides 90mcd at 20mA. LTL1CHKSKNN (320mcd) and 151031YS06000 (110mcd) are brighter alternatives suitable for applications requiring increased visibility. WP710A10YC (30mcd) and SLR-343YC3F (16mcd) are dimmer options for low-brightness applications.

Q6: Are all substitute parts RoHS3 compliant?

All listed substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching SSL-LX3044YC regulatory requirements. No additional compliance verification is required for RoHS3 or REACH status.

Q7: What viewing angle considerations apply to substitution?

SSL-LX3044YC provides 30° viewing angle (narrow, focused indication). Substitutes range from 34° (WP710A10YC) to 60° (151031YS06000). Wider viewing angles provide visibility from multiple directions but may reduce peak brightness perception. Select based on application requirements for indicator visibility.

Q8: Can test current differences affect circuit design?

SSL-LX3044YC and most substitutes operate at 20mA test current. SLR-343YC3F operates at 10mA, requiring circuit redesign if selected. Verify current-limiting resistor values and power supply capacity before substitution to ensure proper LED operation and longevity.

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